| Literature DB >> 34862287 |
Gabriela Beatriz Gomez1,2, Mariana Siapka3,4, Francesca Conradie5, Norbert Ndjeka6, Anna Marie Celina Garfin7, Nino Lomtadze8, Zaza Avaliani8, Nana Kiria8, Shelly Malhotra9,10, Sarah Cook-Scalise9,11, Sandeep Juneja9, Daniel Everitt9, Melvin Spigelman9, Anna Vassall3.
Abstract
OBJECTIVES: Patients with highly resistant tuberculosis have few treatment options. Bedaquiline, pretomanid and linezolid regimen (BPaL) is a new regimen shown to have favourable outcomes after six months. We present an economic evaluation of introducing BPaL against the extensively drug-resistant tuberculosis (XDR-TB) standard of care in three epidemiological settings.Entities:
Keywords: economics; public health; tuberculosis
Mesh:
Substances:
Year: 2021 PMID: 34862287 PMCID: PMC8647530 DOI: 10.1136/bmjopen-2021-051521
Source DB: PubMed Journal: BMJ Open ISSN: 2044-6055 Impact factor: 3.006
Figure 1Characteristics of the standard of care and intervention modelled by setting. BDQ, bedaquiline; BPaL, bedaquiline, pretomanid and linezolid; CFZ, clofazimine; DLM, delamanid; ETO, ethionamide; FBC, full blood count; hdINH, high-dose Isoniazid; LZD, linezolid; PHC, primary healthcare; PZA, pyrazinamide; TRD, terizidone.
Input parameters for cost-effectiveness analyses
| South Africa | Georgia | The Philippines | Reference | |
| Population | ||||
| MDR intolerant/failure | 10% of all patients with MDR-TB | Assumption | ||
| HIV prevalence (n=56/109)* | 51% | – | – |
|
| Age (years) | 35 (range 17–60) |
| ||
| Treatment outcomes† | ||||
| Per cent completed at 18 mo, SoC | 0.73 (0.031) | 0.585 | 0.64–0.73 |
|
| Per cent failure at 18 mo, SoC | 0.045 (0.015) | 0.073 | 0.045 (0.015) |
|
| Per cent LTFU at 18 mo, SoC | 0.10 (0.021) | 0.219 | 0.15–0.20 |
|
| Per cent completed/cure at 6 mo, BPaL | 0.90 (0.83–0.95) |
| ||
| Per cent death, BPaL (n=7/109) | 0.064 (0.026) |
| ||
| Per cent LTFU at 6 mo, BPaL | 0.04 (0.021) |
| ||
| Outcomes after treatment | ||||
| Risk of relapse‡ | 2836 (2131–3693) |
| ||
| Per cent return to care after relapse, SoC and BPaL | 0.75 (±20%) | Assumption | ||
| Per cent return to care after LTFU, SoC and BPaL | 0.20 (±20%) | Assumption | ||
| Median survival after treatment failure, mo (LTFU/relapse/palliative), SoC and BPaL | 19.84 (4.16–26.04) |
| ||
| Disability weight | ||||
| XDR-TB/MDR-TB, without HIV infection | 0.333 (0.224–0.454) |
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| XDR-TB/MDR-TB, with HIV infection | 0.408 (0.274–0.549) |
| ||
| HIV/AIDS receiving ART without TB | 0.078 (0.052–0.111) |
| ||
*All HIV-positive patients are assumed to be on/started on ART.
†Transformed to a rate (per mo) assumed constant.
‡Incidence risk of relapse per 100 000 successfully treated.
ART, antiretroviral treatment; BPaL, bedaquiline, pretomanid and linezolid; LFTU, loss to follow-up; MDR-TB, multidrug-resistant tuberculosis; mo, months; n, number; SoC, standard of care; TB, tuberculosis; XDR-TB, extensively drug-resistant tuberculosis.
Health outcomes and total costs estimate by country
| Scenario | Deaths in 5 years | Total TB-related costs (US$2018) | Total ART-related costs | Incremental (all) cost | Total DALYs | Total DALYs averted | |
| South Africa | |||||||
| Cohort: XDR-TB only | SoC | 223 | 5 206 829 | 13 152 066 | – | 14 007 | – |
| BPaL | 118 | 1 859 461 | 15 446 196 | −1 053 237 | 7486 | 6521 | |
| Cohort: XDR-TB and MDR-TB intolerant/failure | SoC | 529 | 12 378 747 | 31 100 746 | – | 33 115 | – |
| BPaL | 280 | 4 414 849 | 36 525 226 | −2 539 419 | 17 699 | 15 416 | |
| Georgia | |||||||
| Cohort: XDR-TB only | SoC | 16 | 282 680 | – | – | 893 | – |
| BPaL | 7 | 83 775 | – | −198 905 | 396 | 497 | |
| Cohort: XDR-TB and MDR-TB intolerant/failure | SoC | 27 | 478 439 | – | – | 1491 | – |
| BPaL | 13 | 141 489 | – | −336 950 | 661 | 830 | |
| The Philippines | |||||||
| Cohort: XDR-TB only | SoC | 5 | 84 327 | – | – | 268 | – |
| BPaL | 2 | 26 357 | – | −57 970 | 119 | 149 | |
| Cohort: XDR-TB and MDR-TB intolerant/failure | SoC | 221 | 3 704 919 | – | – | 11 890 | – |
| BPaL | 104 | 1 158 821 | – | −2 546 098 | 5316 | 6574 |
ART, antiretroviral treatment; BPaL, bedaquiline, pretomanid and linezolid; DALYs, disability-adjusted life years; MDR-TB, multidrug-resistant tuberculosis; SoC, standard of care; TB, tuberculosis; XDR-TB, extensively drug-resistant tuberculosis.
Figure 2Probability of BPaL being cost saving as the price estimates for pretomanid change. Dashed line corresponds to US$ 364 per treatment course for pretomanid. BPaL, bedaquiline, pretomanid and linezolid; p, probability; Pa, pretomanid.
Input cost estimates for cost-effectiveness analyses (US$2018 per month)
| South Africa | Georgia | The Philippines | Reference | |
| Standard of care (intensive phase) | 558.9 (drugs) | 424.6 (drugs) | 424.6 (drugs) |
|
| Standard of care (continuation phase) | 208.9 (drugs) | 74.58 (drugs) | 74.58 (drugs) |
|
| BPaL | 296.4 (drugs) | 214.0 (drugs) | 214.0 (drugs) |
|
| Palliative care* | 428.1 | 330.9 | 328.0 |
|
| Antiretroviral treatment | 249.2 | – | – |
|
*Average of 10% hospice inpatient unit; 40% community care and 50% no care.
BPaL, bedaquiline, pretomanid and linezolid.