Osteopathic Manual Treatment for Amyotrophic Lateral Sclerosis: A Feasibility Pilot Study.

BACKGROUND: Current interventions in amyotrophic lateral sclerosis (ALS) are focused on supporting quality of life (QoL) and easing pain with a multidisciplinary approach.
OBJECTIVE: Primary aim of this pilot work assessed feasibility, safety, tolerability and satisfaction of osteopathic manual treatment (OMT) in 14 ALS outpatients.
METHODS: Patients were randomized according to an initial single-blind design (12 weeks, T0-T1), in order to receive OMT (weekly for 4 weeks, and fortnightly for the following 8 weeks) versus usual-care (n=7 each group), followed by an OMT open period (T1-T2, once a week for 8 weeks, n=10). Secondary aims included blind osteopathic assessment of somatic dysfunctions (SD) for goal attainment scale (GAS) calculation, Brief Pain Inventory-short form and McGill QoL-16 items.
RESULTS: OMT was demonstrated feasible and safe and patients displayed high satisfaction (T1-VAS=8.34 ± 0.46; T2-VAS=8.52 ± 0.60). Considering secondary aims no significant differences emerged. Finally, at study entry (T0), a cervico-dorsal SD was found in 78% of ALS patients versus 28% of healthy matched controls (p<0.01).
CONCLUSION: OMT was found feasible, safe and satisfactory in ALS. The lack of secondary aim differences can be due to the limited sample size. OMT could be an interesting option to explore in ALS.

RCT Entities:   Population Interventions Outcomes

INTRODUCTION

Amyotrophic lateral sclerosis (ALS) is a neurodegenerative disorder characterized by progressive lack of strength, muscle atrophy and spasticity. The disease usually leads to death in few months since symptom onset due to aspiration pneumonia or respiratory dysfunction. Effective therapies for ALS are currently lacking and management guidelines emphasize the role of a multidisciplinary approach in order to support an adequate quality of life (QoL); emphasis is given on starting cares as soon as possible, providing them until the very end of life. Furthermore, ALS patients often report pain that might easily go underrecognized and undertreated [1]. Among therapies used to face the progressive lack of function in patients with ALS, kinesitherapy, is used in order to avoid excessive spasticity and deconditioning that could overlap with the effects of the disease itself [2]. In this context, osteopathic manual treatment (OMT) might be considered as a complementary approach to ALS, aiming to ameliorate pain management and QoL, as already shown in other neurological disorders, such as Parkinson’s disease and headache [3, 4]. Although, to our best knowledge, no literature report is available on OMT in ALS, there is pilot evidence of safety and efficacy of OMT in Parkinson’s disease (PD) [3, 5]. Understanding the specific impaired or altered function of the somatic system (somatic dysfunctions, SD [6]) expressed by ALS patients might be useful for creating the basis for an effective OMT approach. Finally, OMT is usually well tolerated with a low rate of side effects [4], albeit this has never been reported before in vulnerable patients such as those affected by ALS.

The primary aim of this work consisted in assessing safety, feasibility, tolerability and satisfaction of OMT in a preliminary series of ALS outpatients. The secondary aims included the blind assessment of pain and QoL, besides the blind evaluation of the effects of the OMT by goal attainment scaling (GAS).

MATERIALS AND METHODOLOGY

Patients

Following approval of the protocol by the ethics committee, 14 consecutive ALS outpatients were recruited with written informed consent. All clinical investigation were conducted according to the principles expressed in the Declaration of Helsinki.

Inclusion criteria were: diagnosis of possible-, probable- or definite-ALS according to El Escorial criteria [7]; ALS functional rating scale (ALSFRS-R) score >24; pulse oximetry values ≥92% in clinostatism. Exclusion criteria were: presence of non-invasive ventilation (NIV) or tracheostomy; clinically relevant orthopnea or pulse oximetry values <92% in clinostatism.

Clinical characterization of ALS included the ALSFRS-R [8], the ALS-severity scale (ALS-SS [9],) and the Norris ALS scale [10]. The disease progression index (DPI) was estimated in this work as the loss of ALSFRS-R score over time since onset: [48 - current ALSFRS-R]/disease duration in months [11]. Finally, 14 age- (±5 years) and sex-matched healthy controls were also recruited among the caregivers just for comparison with ALS patients as regards the initial osteopathic evaluation.

Interventions

Patients were randomized (time point: T0) by a randomly generated list according to an initial single-blind design, followed by an open period (see below), in order to receive either OMT (n=7, OMT) or a standard-of-care treatment (physiotherapy twice a week, n=7, FKT). OMT was administered once a week for the first four weeks, and fortnightly for the following eight weeks. At the end of this period (T1), 10 patients received OMT (open period) once a week for the following eight weeks (T2) (Fig. ).

Fig. (1)

Gantt chart of the study. During the first study period (T0-T1), 7 ALS patients received OMT once a week (small white blocks) for the first month and fortnightly during the following 8 weeks (big white blocks); during this period, 7 ALS patients were followed according to usual care (FKT arm, black bar). During the second study period (T1-T2), 10 ALS patients received OMT on a weekly basis.

SD were defined as impaired or altered functions of components of the somatic system including skeletal, arthrodial and myofascial structures, and their related vascular, lymphatic, and neural elements [6]. The osteopathic manoeuvres applied in the OMT group were performed by 5-years experienced personnel and were individually tailored for each patient, according to Greenman’s descriptions [12]. The OMT techniques were focused on the treatment of SD found during the re-evaluations performed before each session; structural (including myofascial release), visceral, and craniosacral techniques were performed as appropriate [4]. Treatment duration was always 40 minutes.

Outcome Measures

Adverse effects of treatment, if reported by patients or caregivers, were recorded by a medical doctor before starting each new session of OMT. A visual analogue scale (VAS) was included at T1 and T2 for those patients receiving OMT, focusing on the perceived satisfaction regarding the treatment.

Each patient was evaluated in blind by a clinical neurologist at the three time points (T0, T1 and T2) for pain and QoL by using two dedicated questionnaires: the Brief Pain Inventory short form (BPI) and the McGill QoL (16 items). BPI allowed the calculation of the pain severity index (PSI) and the pain interference index (PII), averaging the respective items of the scale [13]. The McGill QoL allowed the calculation of: total score (TS), single-item summary score, macroareas scores: (a) physical or (b) psychological symptoms, (c) physical or (d) psychological well-being, and (e) support [14].

Finally, two experienced Doctors of Osteopathic Medicine (D.O.) assessed all patients (and healthy controls), independently and blindly with respect to the initial treatment allocation, re-assessing them at T1 and T2. The observations of these two raters were not used for guiding treatments. The evaluation was performed according to a pre-decided structured scheme focusing on SD in order to check the same anatomical structures and qualify specific parameters (use of accessory muscles of breathing, direction of abdominal wall movement during inspiration, cervical or dorsal kyphosis, etc.); a careful rater training was also performed in advance. These evaluations were used for describing the effect of treatments on the initially found SD on a Goal Attainment Scale (GAS T0-T1 and GAS T1-T2) [15]. Briefly, GAS defines goals of treatment and describes their achievement on 5-point scale, in this case focusing on the number of identified SD: -2 (marked worsening, ≥50%), -1 (mild worsening, <50%), 0 (unchanged), +1 (mild improvement, <50%), +2 (marked improvement, ≥50%). We chose to set the 0 goal to “unchanged” because of the intrinsic progressing nature of ALS.

Sample Size and Statistical Analysis

Considering that patients with ALS might be especially fragile to manual therapies due to the important limb and trunk weakness and to the respiratory insufficiency when in recumbent position, obliging to a continuous and careful reassessment of the provided therapies, we decided that the presently reported sample size could be adequate for a preliminary protocol, able to generate preliminary data on which grounding future studies.

Data are shown as mean ± standard deviation except where specifically noted. Statistical analysis was performed with GraphPad Prism, version 4.00 program. Either, unpaired sample, or repeated measures Student’s t-test were used as appropriate and reported. Correlations were computed by the Pearson’s r test and differences between frequencies by the χ2 test. Significance was set at p<0.05.

RESULTS

Osteopathic Characterization of ALS Patients

Demographic and clinical characteristics of the recruited patients are listed in Table . OMT allocated patients had significantly faster DPI (more than two-fold), reflecting a tendency to more advanced diseases (lower scale scores) and shorter disease durations. Bulbar onset patients were 2 in the OMT group and 1 in the FKT. Only one OMT patient had PEG.

Table 1

Clinical and demographic data of the recruited patients at the different time points of the study.

Time x Treatment	T0 x OMT n=7	T0 x FKT n=7	T1 x OMT n=10
Age, yr	54.0 ± 11.6	51.0 ± 6.5	50.3 ± 7.9
Sex, M/F	5/2	5/2	8/2
Onset, Spinal/Bulbar	5/2	6/1	10/0
Duration, mo	17.1 ± 4.5(11-25)	38.0 ± 30.5(8-95)	35.6 ± 26.2(13-98)
ALSFRS-R	35.0 ± 6.7(28-46)	40.4 ± 4.0(35-46)	33.9 ± 9.0(16-46)
DPI	0.81 ± 0.47 *(0.10-1.54)	0.32 ± 0.23(0.04-0.62)	0.49 ± 0.39(0.03-1.28)
ALSSS	29.5 ± 5.3(24-37)	33.8 ± 2.7(31-39)	30.6 ± 5.3(21-38)
Norris	73.4 ± 16.9(50-94)	90.0 ± 4.5(85-98)	74.9 ± 19.7(36-96)
Riluzole, Y/N	2/5	7/0	7/3

DPI, Disease Progression Index; FKT, usual care (physiotherapy); OMT, osteopathic manual treatment. Data are shown as mean ± SD. *p<0.05 vs. FKT, two-tailed Student’s t-test.

At study entry (T0), a cervico-dorsal SD emerged as particularly prevalent in ALS patients, being documented in 11 (78%) of them and only in 4 (28%) matched healthy controls (χ2 7.04, p<0.01, OR 9.17, 95% CI 1.27-79.25). No correlation was found with clinical characteristics (disease duration, ALSFRS-R score, ALS-SS, Norris score, DPI, prevalence of upper or lower motoneuron involvement), nor differences were found dichotomizing patients according to: site of onset (spinal vs. bulbar), riluzole use or El Escorial category (probable vs. definite) (data not shown).

Primary Aims: Feasibility, Tolerability and Satisfaction

OMT was demonstrated feasible and safe over the whole study. All patients well adhered to treatment procedures. No significant side effects were reported. Only one patient reported moderately increased pain the day after the first treatment. New symptom onset was not recorded. Two OMT patients and two FKT ones dropped out at the end of T1 because of the impossibility of reaching treatment setting due to the advancing disease.

Overall OMT treated patients displayed high satisfaction with VAS scores of 8.34 ± 0.46 at T1 (n=7) and of 8.52 ± 0.60 at T2 (n=10); 5 patients enrolled in the FKT group specifically asked for entering in the OMT arm during the T1-T2 period.

Secondary Aims: Pain, QoL and GAS

8 patients at T0 (57%) failed to report pain at the BPI, as well as 6 patients (43%) at T1 and 7 patients (50%) at T2. Regarding the period T0-T1, no BPI differences were found between the two time points and the two groups (mean delta PSI: -0.23 vs. 0.06, for OMT and FKT, respectively; mean delta PII: 0.71 vs. 1.48, for OMT and FKT, respectively). On the other hand, considering the following period (T1-T2, n=10), a tendency toward pain reduction over time was shown for PSI (p=0.05, two-tailed paired Student’s t-test; see Fig.), which did not reach statistical significance. In contrast, PII scores were unchanged (p=0.13; Fig.).

Fig. (2)

(A) Pain severity showed a tendency to decrease over time in ALS patients between T1 and T2 (PSI, pain severity index of the BPI, p=0.05), while (B) interference with daily life activities was unchanged (PII, p=0.13). Two-tailed paired Student’s t-test; mean ± SEM; n=10.

McGill QoL TS, single item summary score and macroareas scores did not significantly change over time or between the two treatment groups (see Table ).

Table 2

McGill QoL total score, summary and macroarea scores did not vary significantly between groups and over time. Mean ± SD (range).

Time	T0		T1		T2
Treatment	OMT n=7	FKT n=7	OMT n=7	FKT n=7	OMT n=10
Total score	103.3 ± 24.6(72-138)	103.3 ± 25.4(53-126)	105.6 ± 26.5(69-140)	106.0 ± 18.1(86-128)	97.3 ± 22.4(64-135)
Summary score	7.7 ± 1.9(5-10)	6.9 ± 3.1(0-10)	6.1 ± 2.6(2-10)	7.0 ± 2.0(5-9)	6.9 ± 1.9(5-10)
Physical symptoms	19.7 ± 6.4(11-28)	18.0 ± 7.5(5-29)	21.1 ± 5.8(10-28)	20.0 ± 8.7(4-30)	20.8 ± 7.7(8-30)
Psychological symptoms	17.1 ± 11.0(3-31)	15.1 ± 8.4(8-31)	14.0 ± 8.7(3-28)	13.7 ± 5.3(5-20)	17.0 ± 11.2(2-34)
Physical well-being	7.6 ± 2.6(2-10)	6.9 ± 1.6(4-8)	6.0 ± 3.2(2-10)	6.6 ± 1.9(4-9)	7.1 ± 1.7(4-10)
Psychological well-being	48.4 ± 9.2(34-60)	43.0 ± 13.1(15-53)	47.4 ± 10.9(31-59)	46.0 ± 6.3(38-55)	45.0 ± 7.6(34-57)
Support	17.9 ± 2.1(15-20)	16.6 ± 2.8(13-20)	17.6 ± 3.0(14-20)	17.0 ± 3.3(11-20)	17.0 ± 2.7(12-20)

Regarding blind osteopathic GAS scoring relative to the T0-T1 period, 3 patients (43%) allocated to OMT and 2 (28%) allocated to the FKT group showed a mild improvement (GAS score +1); none of the patients allocated to OMT and 2 (28%) patients allocated to the FKT group worsened (GAS score -1) (χ2 p=0.12). Regarding the T1-T2 period, one patient (10%) mildly improved, while 3 patients (30%) mildly worsened in terms of number of SD; 6 patients (60%) remained unchanged (GAS score 0; see Fig.).

Fig. (3)

Goal attainment scale (GAS) in ALS patients undergoing to OMT or FKT during the first period (n=7 for each arm, T0-T1; χ2 p=0.12) and for those 10 patients completing the following two months (T1-T2 period).

DISCUSSION

In this pilot study OMT procedures were clearly found feasible and safe in ALS patients. Furthermore, OMT was highly satisfactory for these patients. Nevertheless, no differences emerged in terms of secondary aims, i.e., the efficiency in modifying pain and QoL, both between the two treatment arms for the first study period and over time. Certainly, the limited sample size obliges to take these results cautiously since a tendency toward a reduction of the severity index was shown over the second study period (T1-T2). Notably, OMT-allocated patients were generally more severe and with shorter disease durations, underlying a significantly faster progression. This issue, unbalanced between the two groups of patients due to the limited sample size, might have been reasonably contributing to the obtained lack of significance and larger studies are needed to assess OMT effects on these selected outcomes.

Furthermore, BPI detects pain only over the last 24 hours, possibly not capturing the complexity of the relapsing-remitting symptoms in a rapid progressing disease, such as ALS. Also, it is important to stress that several patients reported that pain was not a major problem if compared to the decreasing functional autonomy. In order to overcome this problem, previous attempts of detecting pain in ALS patients were done modifying the scale in order to refer to the last week [1]. Possibly, ALS-dedicated pain questionnaires could be developed and validated in the future in order to improve pain detection. Besides “hard” secondary outcomes, we decided to include a single-blind measure able to describe putative treatment-induced modifications in terms of osteopathic medicine. To our knowledge, this is the first attempt of blind scoring the achievement of specific osteopathic outcomes (in this case SD reduction) by using a patient-tailored scale. Goal attainment scaling was chosen, setting the desired expected outcome on the lack of osteopathic changes over time, considering the intrinsic worsening nature of ALS. Albeit no significant differences were reported between OMT and FKT arms, a tendency toward less worsening was shown in the OMT group, again suggesting that sample size could be increased before concluding. From our initial assessments, we conclude from this pilot study that an osteopathic substrate for manual treatment might be present in ALS patients, since they express more frequently a cervico-dorsal SD when compared to healthy matched controls. Albeit the significance of this dysfunction in terms of OMT is not exactly known, future studies may determine if this SD might respond to focused OMT approaches and if this result might affect pain, QoL or other outcomes, for example functionally-related. We regard this approach as fully justified by the lack of current effective treatments able to contrast disease-related pain and QoL impairment in ALS patients. In fact, the high level of satisfaction perceived by all those patients receiving OMT raises important questions related to what exactly is measured by the used outcomes. For example, we may postulate that the lack of QoL improvement we observed in front of elevated VAS scores indicates that specific areas of one patient’s life might selectively benefit from OMT. Nevertheless, considering that OMT could be adapted to each phase of the disease and seems safe also in these fragile patients, we support the idea that could be an interesting option to explore in ALS. In fact, a multimodal treatment strategy might help in developing approaches patient-tailored able to ease sufferance for these individuals till the very end of their life, sustaining, at the same time, their caregivers.

FUNDING

Italian Academy of Osteopathic Medicine (AIMO).

ETHICAL APPROVAL

Protocol 129 10-JUN-2014; ethics committee of the University of Milano-Bicocca, Italy.

Raw data are available upon request from the Authors.