The personal, societal, and economic burden of schizophrenia in the People's Republic of China: implications for antipsychotic therapy.

BACKGROUND: This article describes the personal, societal, and economic burden attributable to schizophrenia in the People's Republic of China and highlights the potential for effective outpatient treatment to reduce this burden given recent changes in the Chinese health care system. The importance of effective antipsychotic therapy in reducing the burden of schizophrenia is also examined.
METHODS: Published research on the burden, disability, management, and economic costs of schizophrenia in the People's Republic of China was examined in the context of the larger body of global research. Research written in English or Chinese and published before June 2012 was identified using PubMed, CNKI, and Wanfang Med database searches. The contribution of effective antipsychotic therapy in reducing the risk for relapse and hospitalization and improving patients' functioning is described.
RESULTS: Schizophrenia imposes a substantial burden on Chinese society, with indirect costs accounting for the majority of the total cost. Functional impairment is high, leading to lost wages and work impairment. In the People's Republic of China, schizophrenia is the most common diagnosis among hospitalized psychiatric patients. Ongoing changes in the Chinese health care system may reduce some barriers to effective relapse prevention in schizophrenia and potentially reduce hospitalizations. The use of antipsychotics for acute episodes and maintenance treatment has been shown to decrease symptom severity and reduce the risk for relapse and hospitalization. However, discontinuing antipsychotic medication appears common and is a strong predictor of relapse. Cost-effectiveness research in the People's Republic of China is needed to examine the potential gains from improved outpatient antipsychotic treatment.
CONCLUSION: Schizophrenia is a very costly mental illness in terms of personal, economic, and societal burden, both in the People's Republic of China and globally. When treated effectively, patients tend to persist longer with antipsychotic treatment, have fewer costly relapses, and have improved functioning. Further research examining the long-term effects of reducing barriers to effective treatments on the societal burden of schizophrenia in the People's Republic of China is needed.

Introduction

Schizophrenia is a highly debilitating mental illness that is seen across nearly every culture and is characterized by impaired thinking, feeling, behavior, and functioning.1–3 The World Health Organization ranks schizophrenia among the top ten causes of years lost because of disability.4 Most of the research on schizophrenia has been conducted in Western countries. The purpose of this review is to examine the available literature on the personal, societal, and economic burden attributable to schizophrenia in the People’s Republic of China, in the context of international research in this field, and to highlight the importance of effective antipsychotic therapy and relapse prevention in reducing the burden of schizophrenia in both the acute and maintenance treatment phases.

Diagnosis

The primary symptoms in schizophrenia can be broadly categorized into positive and negative symptoms.1,5,6 Positive symptoms include delusions, hallucinations, disorganized speech, and bizarre behavior; negative symptoms include fat emotions, reduced speech, and reduced goal-driven behavior. Globally, schizophrenia is usually diagnosed using either the Diagnostic and Statistical Manual of Mental Disorders, 4th Edition, Text Revision (DSM-IV-TR)1 or the International Statistical Classification of Diseases and Related Health Problems, 10th Revision (ICD-10) criteria.6 In the People’s Republic of China, schizophrenia is diagnosed using the Chinese Classification of Mental Disorders, 3rd Edition, Revised (CCMD-3) criteria.5 Although not identical, diagnostic criteria for schizophrenia within the DSM-IV-TR, ICD-10, and CCMD-3 are largely similar, although CCMD-3 differs in that it requires a loss of insight during the active phase of the illness as well as significant social dysfunction.5 Both the ICD-10 and CCMD-3 require continuous symptoms for at least 1 month, rather than the 6-month duration required by the DSM-IV-TR. Regardless of the diagnostic system, implicit in the symptoms of schizophrenia are deficits in cognition, social functioning, and productive functioning.7,8

Epidemiology

Schizophrenia is found in all societies. A meta-analysis of 85 studies estimated the worldwide prevalence of schizophrenia to be 0.54%.9 In the People’s Republic of China, a recent large-scale study estimated the 1-month prevalence rate at 0.78%, with similar rates found in rural (0.80%) and urban (0.72%) areas.10 Other studies in the People’s Republic of China have reported prevalence estimates ranging approximately from 0.2% to 2.2%.9,11 The prevalence of schizophrenia in the People’s Republic of China appears to be similar to the global prevalence.

Disease management in the People’s Republic of China

When reviewing global research on schizophrenia, which has been primarily generated in Western countries, any cultural, socioeconomic, and treatment modality differences present in the People’s Republic of China need to be considered. The results of the largest schizophrenia observational study to date, the Worldwide-Schizophrenia Outpatient Health Outcomes study, which did not include the People’s Republic of China, revealed the existence of country-level and geographic differences in the course and prognosis of schizophrenia. In general, patients living in less developed regions had a more favorable disease course: continuous remission was lowest in Northern and Southern Europe (45.7%) and highest in North Africa and the Middle East (67.4%); remission followed by a relapse was lowest in North Africa and the Middle East (13.6%); and a persistent symptomatic course was lowest in East Asia (15.1%) and highest in Southern Europe (39.3%).12 These findings parallel a previous study by the World Health Organization.13 The improved outcomes in developing countries may reflect differences in extended family structures, greater social inclusion, reduced stigma, or greater employment in schizophrenia.14 Although the better prognosis in developing countries conclusion may be an oversimplification, a recent review of 23 longitudinal studies in low- to middle-income countries found a large heterogeneity in outcomes from different studies and countries and reported that a lack of treatment was consistently associated with worse outcomes, whereas accessing care was associated with improved outcomes.15 Nevertheless, the variability in outcomes across regions highlights the need to consider the culture, socioeconomics, and treatment methods within a given region or country.

The stigma associated with mental illness can have a pernicious effect on individuals with mental health problems and their families.16 In the People’s Republic of China, the disruptive behaviors of individuals with schizophrenia are considered a serious cultural transgression, and the stigma may extend to the families as well as the affected individual.17,18 The family bears a greater responsibility for managing the individuals with schizophrenia in the People’s Republic of China relative to many Western cultures, in which the primary responsibility often falls on the affected individual or the health care system.19 As a result, in the People’s Republic of China, individuals with schizophrenia and their families may try to hide the disorder for as long as possible, creating potential barriers to receiving and adhering with mental health treatment.17,18

The health care system in the People’s Republic of China has undergone substantial changes during the last 35 years. Beginning in 1978, decreased central government support and significant policy changes led to a decentralized and privatized health care system.19,20 As part of the new market-based economy, hospitals were encouraged to make a profit, and many mental health rehabilitation facilities dependent on government funding were closed or transformed into small-scale psychiatric hospitals.21 These economic reforms resulted in a reduction in the number of community-based and work-rehabilitation centers, particularly in less affluent rural areas, where mental health services became essentially nonexistent. Specialized psychiatric hospitals became the primary treatment setting for patients with psychiatric conditions, and very few community-based psychiatry services existed.18 In 2002, the first National Mental Health Plan was signed. It included stated goals to establish an effective system for mental health care and to strengthen existing mental health services to decrease the burden and disability associated with mental illness. Several programs were initiated, and they have had a significant effect in some regions.21

A mental health reform program, named the 686 Program, received formal support from the Ministry of Finance in 2004. By early 2005, 60 demonstration sites were established, including one urban and one rural site in each of the People’s Republic of China’s 30 provinces. The program screened patients for possible psychosis, subsidized the cost of medications and hospitalizations for the socially disadvantaged, and implemented community action programs that encompassed the best-practice principles from allied health disciplines. By 2009, the program’s coverage had been expanded to include 112 cities and 96.9 million people, or 7.3% of the People’s Republic of China’s 1.33 billion population.21,22

Large changes in the availability of health insurance have also occurred in the last 15 years in the People’s Republic of China. The rapid economic growth experienced within the People’s Republic of China has been concentrated in the urban areas and has contributed to regional disparities.23 Although commercial health insurance schemes that primarily target the more affluent in Chinese society have expanded, the major change has been the introduction of a countrywide health insurance system, known as basic social medical insurance (BSMI). The BSMI has expanded rapidly, driven by the central government’s goal to provide universal health coverage to the entire population of the People’s Republic of China.24 The BSMI consists of three components: the basic social medical insurance for urban employees (initiated in 1998), the basic social medical insurance for urban residents (initialed in 79 cities in 2007), and the New Rural Cooperative Medical Insurance for Rural Residents (established in 2003).24 The tremendous changes in insurance coverage implemented in the last decade have the potential to improve access to effective health care for hundreds of millions of people and to potentially reduce health-related disability in the People’s Republic of China.

Although insurance coverage is now available to most individuals in the People’s Republic of China, specific coverage for schizophrenia and mental health is varied. In some of the wealthier Eastern areas, the mental health service system is being reformed quickly within whole provinces or cities, but in some underdeveloped Western areas, where skills and resources are lacking, the existing national mental health policies have not yet been implemented.21 The implementation of specific mental health policies and services also tends to be more common in Eastern China than Western China and for urban compared with rural residents. More than 30% of the regions have no specific health insurance policies for mental disorders, and where policies do exist, they tend to be appropriately aimed at the reimbursement of outpatient services.25 Without appropriate coverage for outpatient care of patients with schizophrenia, there is a risk for inadvertently incentivizing the overuse of more expensive hospitalization and inpatient services.

Past research has also shown that many patients with schizophrenia in the People’s Republic of China may not always receive needed care. A large-scale epidemiologic study in the People’s Republic of China reported that 27.6% of patients with psychotic disorders never sought treatment.10 Similarly, another study in rural China found that almost one-third of individuals with schizophrenia received no treatment at all, despite 76% of these individuals having marked symptoms.11 The primary reasons reported for the patient not receiving treatment were lack of money (35.3%), uncertainty about the patient’s illness (29.5%), the patient refusing to accept drug treatment (18.6%), and having no relatives to care for the patient (14.7%).26 Perceptions and psychological attributions of schizophrenia as well as issues of availability, access, and affordability of care may represent important barriers to effective treatment in the People’s Republic of China.

Another important barrier in the People’s Republic of China is the limited number of mental health care practitioners and inpatient facilities. In 2004, the People’s Republic of China had 1.99 psychiatric nurses and 1.29 psychiatrists per 100,000 population compared with 6.50 and 13.70, respectively, in the United States and 24.80 and 9.80 in Europe. Similarly, the People’s Republic of China had 1.06 psychiatric beds per 10,000 population compared with 7.70 in the United States and 8.00 in Europe.27 Although there are fewer mental health care practitioners and inpatient facilities in the People’s Republic of China, estimates of the length of stay for a patient with schizophrenia have ranged from 36.8 to 69.9 days,28,29 which is longer than the 7.4 to 11.1 days seen in the United States,30 30.7 days seen in Australia,31 and 35 days seen in Spain,32 but similar to the number of days seen in Finland.33 The longer inpatient stays in the People’s Republic of China may reflect fewer available community-based treatment options.

Disability

The World Health Organization lists schizophrenia in the top eight causes of years lost to disability.4,34 In the People’s Republic of China, schizophrenia was ranked as the 18th most important health problem.18

The functional impairments associated with schizophrenia are sufficiently severe to be apparent in high-level indicators such as unemployment and marriage rates. Globally, the unemployment rate in samples of individuals with schizophrenia has ranged from 10% to 96%, depending on the study method and country, with the majority of estimates being greater than 75%.35–39 In the People’s Republic of China, estimates of the unemployment rate for patients with schizophrenia have ranged from 41.3% to 64.7%.40–43 Although lower than many global estimates for the rate of unemployment in schizophrenia, these rates are substantially higher than the overall unemployment rate in the People’s Republic of China, which is reported to be lower than in most countries.44

Global estimates of marriage rates for patients with schizophrenia have ranged from about 5% to 30%, with most between 15% and 30%.35–37,45–48 In the People’s Republic of China, the rates of marriage for samples of individuals with schizophrenia have ranged from 10.9% to 46.7%.28,40–43 Marriage and employment rates may be slightly higher in the People’s Republic of China than globally, but they remain substantially lower than in populations without schizophrenia because of the strong effect of the disorder on social and productive functioning.

Economic consequences of schizophrenia

Schizophrenia is an expensive disorder and is associated with high levels of direct costs to the health care system and very high levels of indirect costs, primarily because of lost productivity. Direct costs refer to payments that are made, including those for inpatient stays, outpatient services, and medications, whereas indirect costs refer to resources that are lost as a result of the illness, including lost wages of the patient, lost wages of caregivers, and lost years of life. A review of multiple cost-of-illness studies for schizophrenia from around the globe reported that the direct health care costs of treating schizophrenia accounted for between 1.4% and 3.0% of total national health expenditures.49 In the People’s Republic of China, schizophrenia has been reported to contribute 1.3% of the total burden of disease.50

Comparing costs across geographies is challenging, given differences in study methodologies and health care systems. Although few studies have taken a comprehensive view of the cost of schizophrenia across all of the People’s Republic of China, several studies have examined the costs in specific geographic areas.

Cost of schizophrenia in the People’s Republic of China

Zhai et al50 followed-up 299 patients with schizophrenia from Shandong and Hunan provinces who met DSM-IV diagnostic criteria for 1 year. The patients and their caregivers maintained receipts for all health care services and medications received and completed the Economic Cost Questionnaire every 2 months during the year. The median annual costs in Chinese currency per patient were ¥4370 (approximately US $700) in direct costs and ¥10,081 (approximately US $1600) in indirect costs. Direct costs for those patients who had at least one hospitalization (¥7614) were substantially higher than for those who were not hospitalized (¥1812; P < 0.001). Caregivers bore a substantial part of the indirect costs (¥3600). Although the annual per patient costs are much lower in the People’s Republic of China than in most Western countries, the average net income of a rural resident was only ¥2936 in 2004 (¥9422 disposable income for an urban resident),51 and much of the indirect cost may have fallen on the patient and his or her family.50

In Zhejiang province in 2010, other research examined the direct psychiatric hospital costs for 7684 inpatients. Schizophrenia was the most common diagnosis, making up 3117 of the 7684 discharges. Median total cost for schizophrenia was ¥10,765 per admission or ¥241 per day. Psychiatric medications made up ¥834 of the cost during the hospital admission. Schizophrenia and other psychotic disorders had the longest duration of admission, with an average of 45 days.29

Cost of schizophrenia outside the People’s Republic of China

Administrative claims from the Taiwanese governmental health insurance data in 1999 found that the equivalent of US $112.4 million was spent on care for schizophrenia, which represents 1.2% of the total national health care expenditures. Most of the expenditures (US $84.5 million or 75.2%) were on inpatient care, with US $27.9 million spent on outpatient care, with inpatient and outpatient medication costs of US $28.9 million. On a per patient basis, the average annual direct treatment costs for schizophrenia were US $2144.52 Another study in Taiwan followed up 74 patients treated with risperidone or haloperidol for 1 year beginning during 1999 or 2000. The average annual per patient direct costs were estimated at US $2115, but indirect costs were substantially higher, at US $14,461, primarily because of lost wages for the patient and caregivers.53

Using data from the National Health Insurance in South Korea, the total direct health care costs for schizophrenia during 2005 were estimated at US $418.7 million, with inpatient costs accounting for US $327.7 million (78.3%), outpatient costs being US $77.7 million (18.6%), and medication costs being US $13.3 million (3.2%). The average per patient annual total direct treatment cost was US $2600. Indirect costs were substantially higher, at US $2635.1 million, and were driven primary by lost wages.54

In comparison, the total costs in the United States in 2002 were estimated to be $62.7 billion, with direct health care costs comprising $22.7 billon.55 Hospital and long-term care costs made up 47%, outpatient care 31%, and medications 22.2% of the direct health care costs. The annual per patient direct cost was $15,464.55

The higher indirect costs reported in the People’s Republic of China are consistent with findings from other geographies, although Asian countries appear to have a larger proportion of indirect costs (87% in Taiwan,53 83% in Korea,54 and 63% in India56) than those reported in Western countries (47% to 81%).49 Because of substantial disability, individuals with schizophrenia incur significant indirect costs resulting from lost wages, premature mortality and suicide,49,55 involvement with the criminal justice system,57 and caregiver burden.49,58 In a review of multiple studies from various geographies, the high direct and indirect costs of schizophrenia have been consistently reported.49

Health care resource use

Globally, the use of inpatient facilities is a significant component of the cost of treating schizophrenia.55,59 In a review of cost-of-illness studies for schizophrenia, Knapp et al49 found that hospitalization accounted for between 16.5% and 94% of costs, depending on the country and study methods, with two-thirds of the studies finding that hospitalization accounted for more than 50% of total direct health care costs.

Throughout the world, studies have reported the length of hospitalization for each schizophrenia admission to range from 7.4 to 90 days.30,60–63 In the People’s Republic of China, published estimates of the length of hospitalization for patients with schizophrenia have ranged from 36.8 to 69.9 days, depending on the year and the health insurance status of the patient, with insured patients tending to have longer inpatient stays.28,29 These estimates may not be representative of the current situation or the whole country, given the rapidly changing health care system and regional variations in the People’s Republic of China.

Medications also account for a significant, but substantially lower, proportion (2.0%–13.0% in Western countries) of direct health care costs compared with inpatient and outpatient services.49,59 One study in Zhejiang province reported that the overall cost of hospitalization was ¥10,765 for schizophrenia, with ¥834 for psychiatric medications and ¥719 for nonpsychiatric medication.29 The use of effective antipsychotic medication has been shown to decrease both inpatient and outpatient health care use,49 and low rates of medication adherence have been shown to be associated with higher total inpatient costs.64,65

Treatment goals

The treatment goals for patients with schizophrenia vary, depending on the phase of the illness. During an acute episode, the goals of treatment are to prevent harm, control disturbed behavior, suppress symptoms, attempt to get a rapid return to the best level of functioning, and develop an effective treatment alliance with the patient and family.2,8 Once in the stabilization phase, usually 3–6 months after the acute phase, the primary goals are the consolidation of the therapeutic relationship, reduction of positive symptoms, improvement in cognitive and negative symptoms, improvement of social deficits, promotion of insight and medication adherence, support of developing individual coping strategies, integration of the patient back into their community, and identification of support options to minimize the rate of relapse.3,8 Finally, in the stable phase, the goals become improvement of functioning and recovery, maintaining or improving quality of life, and prevention of relapses.3,8 Therapeutic interventions for schizophrenia include both psychosocial and pharmacological treatments, and the best course of treatment is often a combination of both. In the People’s Republic of China, adding psychosocial interventions to medications has been shown to decrease the risk for medication discontinuation and relapse and to improve quality of life and functioning compared with medication alone.66

Role of antipsychotics

Antipsychotic medications have been the mainstay of the treatment for schizophrenia since their introduction in the 1950s and are recommended for use to treat acute psychotic states as well as maintenance treatment to prevent future relapses.2,8,67,68 Frequently, antipsychotic medications are broadly categorized as being either typical, first-generation antipsychotics (FGAs) or the newer, atypical, second-generation antipsychotics (SGAs). FGAs and SGAs have been thought to differ in terms of treatment effectiveness, tolerability, and adverse event profile.69 The SGAs have been reported to lead to improvements in patient outcomes and a reduced risk for extrapyramidal adverse events compared with FGAs.67,70 However, FGAs and SGAs are heterogeneous groups of medications that have been somewhat arbitrarily grouped together primarily as a result of being developed before or after clozapine.69 In clinical care, SGAs have largely replaced the older FGAs, with risperidone, olanzapine, and quetiapine often being the most commonly prescribed agents.71,72 Research examining antipsychotic use patterns for schizophrenia in the People’s Republic of China also suggests that the SGAs are replacing the FGAs.73 The most commonly used SGAs in the People’s Republic of China appear to be clozapine, risperidone, olanzapine, and quetiapine.74

Relapse

Symptomatic relapse in schizophrenia can be devastating not only to the patients but also to their families. When the patients’ symptoms remain under control, the patients can slowly begin to reintegrate into society; however, when they experience an acute relapse, the setback can be dramatic, often disrupting relationships and employment. Relapse often results in hospitalization35,63,75 and leads to increases in the use of outpatient services and medication use.75 Relapses tend to increase symptom persistence, disrupt efforts at rehabilitation, and damage relationships, and may lead to greater cognitive decline.76,77

Predictors of relapse

Global treatment guidelines for schizophrenia recommend continuing antipsychotic medications for a minimum or 1 to 2 years after a first-episode patient is stable because this treatment is one of the most efficacious means of relapse prevention.3,8,68 For patients who have had multiple episodes, continuing antipsychotic treatment for a minimum of 5 years and potentially throughout the lifetime is recommended.3,8

A recent meta-analysis of 65 randomized controlled trials found that compared with those taking placebo, patients taking antipsychotic medications were significantly less likely to relapse (relative risk, 0.35) or to be hospitalized (relative risk, 0.38).78 The number needed to treat indicated that during the study periods, for every three patients maintained on an antipsychotic instead of placebo, a single relapse would be prevented.78 The evidence from global studies is strong that antipsychotic maintenance treatment prevents future relapses.

Nonadherence with antipsychotic medication is one of the strongest predictors of relapse.79 When medications are discontinued, the risk for symptomatic relapse has been shown to increase by nearly five times.80 Similarly, medication nonadherence has been shown to be predictive of increased hospitalization rates.81–84 In the People’s Republic of China, a randomized controlled trial found that relative to continuing treatment with the initial antipsychotic (risperidone) dose, random assignment to dose reduction increased the risk for relapse substantially (odds ratio, 2.9), as did poor adherence with medication.43

Nonadherence may be particularly problematic in the People’s Republic of China when patients and their families do not believe that the patient needs to continue treatment with an antipsychotic medication.26,85 An epidemiologic study identified 510 patients with schizophrenia in rural Xinjin county and found that only 30 (5.9%) were currently taking antipsychotic treatment, 92 (18.0%) underwent inconsistent treatment for less than 2 months, 106 (20.8%) had only used traditional Chinese herbal medicines, and 156 (30.6%) had never received any treatment.11 A more recent observational study followed up 1133 patients treated with antipsychotics and found that 40.5% discontinued the study antipsychotic during the 1-year study.86 Other reviews have reported that most patients did not remain on medication for more than 1 year after their initial hospital admission.18 More research is needed to understand the rates of early medication discontinuation and the factors that lead to early discontinuation of antipsychotic treatment in the People’s Republic of China.

Antipsychotics differ in effectiveness

Global research has found that patients are more likely to continue treatment with some antipsychotics relative to others. Time to discontinuation of an antipsychotic for any cause has become an important marker of the real-world effectiveness of antipsychotics in the treatment of schizophrenia.87 Global research has found that patients will continue taking, and clinicians will continue to prescribe, an antipsychotic if they believe the efficacy of the medication, particularly for positive symptoms, outweighs any tolerability issues.88 A recent review of the comparative effectiveness of atypical antipsychotics for the treatment of schizophrenia found that clozapine was the most effective antipsychotic, followed by olanzapine and then by all other atypical and typical antipsychotics.89 Because of its greater efficacy, clozapine remains the treatment of choice for treatment-resistant patients, despite blood monitoring recommendations because of the potential for agranulocytosis, which can be fatal.8,90 Among other (nonclozapine) atypical antipsychotics, olanzapine has been shown to differ on effectiveness when measured as time to all-cause medication discontinuation.

The National Institute of Mental Health-sponsored Clinical Antipsychotic Trials of Intervention Effectiveness (CATIE) study found that patients persisted longer with olanzapine than quetiapine or risperidone.91 Similarly, large observational trials in Europe have found patients treated with clozapine and olanzapine remain on their antipsychotic medication for a longer period of time than many other commonly prescribed atypical or typical antipsychotics.33,92,93 The only study specifically examining antipsychotic discontinuation rates in the People’s Republic of China, a prospective observational study, failed to find any significant differences.86 However, the rate of treatment discontinuation at 12 months was high (36.7%–46.9%), and the treatment duration (mean, 8.9 months) was short for all antipsychotics studied. The cost of medications in this study was paid for by the patients or their families, and the authors state that affordability may have been a factor that influenced the results.86

The CATIE study also examined the rates of hospitalization for exacerbations of schizophrenia during the 18-month study.91,94 Similar to the findings on medication discontinuation, the risk for hospitalization was lowest for olanzapine-treated patients and highest among the quetiapine-treated patients (Figure 1).

Figure 1

Annual hospitalization rates for exacerbation of schizophrenia in CATIE (Phase I).94 Adapted with permission from Psychiatric Services, (Copyright ©2011). American Psychiatric Association. All Rights Reserved.

Notes: Error bars represent 95% confidence intervals. Olanzapine was significantly different (P < 0.05) from quetiapine, perphenazine, and ziprasidone.

Abbreviation: CATIE, Clinical Antipsychotic Trials of Intervention Effectiveness.

Similarly, a large, prospective, observational study of patients with schizophrenia treated in usual clinical care in Europe also found that olanzapine provided significantly improved negative, positive, and cognitive symptoms compared with risperidone, quetiapine, oral typicals, and depot typicals.95

Antipsychotic efficacy

In contrast to effectiveness research, which examines health outcomes from treatments when implemented in usual clinical care, efficacy research examines key clinical outcomes such as symptom reduction from protocol-implemented treatment in well controlled studies. A meta-analysis of 150 randomized double-blind controlled trials comparing the efficacy of typical and atypical antipsychotics found better overall efficacy for the atypical antipsychotics on positive and negative symptoms compared with the typical antipsychotics. When specific atypical antipsychotics were compared with typical antipsychotics, greater efficacy was observed for clozapine, olanzapine, amisulpride, and risperidone, but not the other atypical antipsychotics.96 In another meta-analysis of 78 randomized clinical trials comparing the atypical antipsychotics head-to-head, the authors found that the atypicals could not be considered all alike on efficacy, with olanzapine showing significantly greater efficacy than risperidone, quetiapine, aripiprazole, or ziprasidone; clozapine showing significantly greater efficacy than zotepine; and risperidone showing significantly greater efficacy than quetiapine and ziprasidone.97 An examination of longer-term symptomatic relapse rates across studies found that patients taking olanzapine had significantly less risk for relapse compared with those treated with risperidone, quetiapine, ziprasidone, or typical antipsychotics.98 Globally, research has found that the short-term efficacy and longer-term relapse prevention of atypical antipsychotics varies for the different compounds, with greater efficacy reported for clozapine and olanzapine.

The Chinese literature on the comparative efficacy of antipsychotics appears similar to the global research. In a randomized, open-label trial of antipsychotic drug-naïve Chinese patients, olanzapine demonstrated significantly greater decreases in schizophrenic symptoms compared with ziprasidone.99 A study comparing risperidone and aripiprazole reported no differences in efficacy,100 and another study showed greater efficacy of risperidone over haloperidol for treatment-resistant patients.101 The research from the People’s Republic of China, although less comprehensive, appears consistent with the global research.

Antipsychotics and tolerability

A meta-analysis using randomized double-blind studies of atypical and typical antipsychotics in the treatment of schizophrenia found that patients treated with atypicals were significantly less likely to need adjunctive treatment for extrapyramidal symptoms but were significantly more likely to gain weight, particularly when treated with clozapine or olanzapine.96,102 Olanzapine treatment has also been associated with significantly higher increases in cholesterol than aripiprazole, risperidone, and ziprasidone and with significantly higher increases in blood glucose than amisulpride, aripiprazole, quetiapine, risperidone, and ziprasidone.102 Risperidone-treated patients have been found to have a significantly higher likelihood for prolactin increases and sexual dysfunction than other atypical antipsychotics.98,103 Studies conducted in the People’s Republic of China have also found significantly reduced extrapyramidal symptoms,86,104 but greater weight gain and greater increases in cholesterol and triglycerides,86,104–106 for olanzapine-treated patients relative to patients treated with risperidone, ziprasidone, or typical antipsychotics. Both global and Chinese studies have found that efficacy and tolerability profiles vary for different antipsychotics. The clinician’s goal is to identify the antipsychotic with the efficacy and tolerability profile best suited to a specific individual with schizophrenia.

Effective management of adverse events may lead to improved outcomes. A recent post hoc analysis from the Chinese subgroup (n = 330) of a multicountry, 6-month, prospective, observational study of outpatients with schizophrenia who were treated with olanzapine compared outcomes for patients who participated or did not participate in a weight control program. Not only did the participants in the weight control program gain less weight but they also had significantly better clinical and functional outcomes: greater improvement in illness severity, higher treatment response rate, shorter time to response, reduced impairment in work activities, and greater improvement in patients’ insight.107,108 This finding supports the clinical experience that participation in a weight control program may help prevent clinically significant weight gain in patients treated with antipsychotics and may also be associated with additional clinical and functional benefits that may help prevent relapse.

Discussion

Schizophrenia imposes a high burden on Chinese society, particularly on the individuals with the disease and their families.50 The Chinese health care system has undergone major changes since 1978, becoming more decentralized and privatized.19–21 At this time, there are initiatives to establish universal health care coverage, and a growing number of individuals are covered by health insurance systems, which can provide some relief from the high direct health care costs of schizophrenia for the patient and family members.21,24 In the recent past, very few community-based psychiatric services have been available, particularly in rural areas, with most services provided by specialty psychiatric hospitals that were primarily located in urban areas.21 In late 2012, the Mental Health Law of the People’s Republic of China was passed. In addition to providing more protection to people suffering from mental illness, including a new protocol for commitment to psychiatric hospitals, the new law supports the expansion of community mental health services.109,110 With the ongoing mental health reforms, there is an opportunity for the development of cost-effective outpatient treatment services that use effective medications to prevent relapses. In terms of direct health care costs, hospitalizations are expensive and often of long duration.29 However, the greatest burden associated with schizophrenia in the People’s Republic of China is a result of indirect costs,50 which include the burden on the caregiver and family and the costs associated with lost productivity, social dysfunction, and premature mortality.

Unfortunately, in the People’s Republic of China, many patients with schizophrenia do not initiate or persist with antipsychotic treatment. Several barriers to receiving antipsychotic treatment exist, including patient and family beliefs about the need for continuing antipsychotics, the cost of the medications to the families, and the limited availability of outpatient services.26 This discordance between actual and recommended practice is a major cause for concern. Research has repeatedly linked antipsychotic discontinuation with greater rates of relapse and hospitalization and with further functional disability.78–80 The burden of the disease could potentially be reduced in the People’s Republic of China if persistence on antipsychotic therapy could be increased.

Improved access to effective treatments in the People’s Republic of China, particularly the combination of family education and antipsychotic treatment, could help reduce the personal, societal, and economic burden of this disease. One study found that adding family-based psychoeducational treatment to antipsychotic medication reduced treatment discontinuation and relapses and increased social functioning, health-related quality of life, and employment rates.66 Recent reviews of antipsychotic efficacy and effectiveness have shown that patients are more likely to persist on therapy with the more effective second-generation antipsychotics for a longer period of time.89,111 Cost-effectiveness research investigating potential gains from improved access to effective antipsychotic treatment of people with schizophrenia in the People’s Republic of China is needed, given the high costs associated with this condition to the individual, the health care system, and society.

Conclusion

Improving access and increasing the levels of persistence with antipsychotic medications in the People’s Republic of China would likely reduce the rate of relapse, improve patient outcomes, and reduce total treatment costs. Several barriers exist to optimum treatment, including the paucity of outpatient psychiatric centers, beliefs about the need for maintenance treatment once acute symptoms are treated, and the relatively high cost of medication to patients and families. Increasing the duration of maintenance treatment, particularly with effective antipsychotics, would likely translate into lower rates of relapse, which is expected to help reduce the personal, societal, and economic burden of schizophrenia in the People’s Republic of China by improving patient outcomes.