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Allard-Gray A, Boakye I, Camara A, Eisenbeis L, Guimarães-Teixeira E, Sow O, Zielinski D, Campbell JR, Menzies D. Factors Associated With Discontinuation of Tuberculosis Preventive Treatment: Post Hoc Analysis of 2 Randomized, Controlled Trials. Clin Infect Dis 2023; 77:84-93. [PMID: 36949623 PMCID: PMC10320123 DOI: 10.1093/cid/ciad164] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2022] [Revised: 03/10/2023] [Accepted: 03/20/2023] [Indexed: 03/24/2023] Open
Abstract
BACKGROUND Adherence to tuberculosis preventive treatment (TPT) is an important determinant of clinical benefit. We assessed the association of participant behaviors early in TPT with subsequent discontinuation. METHODS We used data from a phase 3 randomized trial and the preceding phase 2 trial to compare 4 months of rifampin to 9 months of isoniazid for TPT. We excluded participants whose providers discontinued TPT due to adverse events or tuberculosis disease. We analyzed 4 outcomes: discontinuing TPT within the first month of treatment, discontinuing TPT between the first and second month, discontinuing TPT after the second month, and completing treatment but not per protocol. We analyzed the association of outcomes with regimen and participant characteristics and 4 behavioral predictors of discontinuation recorded at the month 1 and month 2 follow-up visits: reporting symptoms of intolerance, missing >20% of doses, rescheduling appointments, and not bringing their medication bottle. RESULTS Overall, 6656 participants were included (phase 3, 5848; phase 2, 808), of whom 4318 (64.9%) completed treatment per protocol. Participant characteristics were inconsistently associated with discontinuation. Phase 3 trial participants with 1, 2, or 3-4 behavioral predictors at the month 1 follow-up had 5.0 (95% confidence interval, 3.6-6.7), 18.6 (13.3-26.1), and 79.4 (38.2-165.0), respectively, higher odds of discontinuing before the second month. The corresponding number of predictors at the month 2 follow-up had 1.8 (1.4-2.2), 4.7 (3.6-6.2), and 7.4 (4.6-11.9) higher odds of discontinuing before completing treatment; phase 2 findings were similar. CONCLUSIONS Four behavioral predictors recorded early in therapy were more strongly associated with subsequent discontinuation than participant characteristics, particularly when more than 1 behavioral predictor was recorded. Clinical Trials Registration. NCT00170209; NCT00931736.
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Affiliation(s)
- Alex Allard-Gray
- Indigenous Health Professions Program, McGill University, Montreal, Quebec, Canada
| | - Isaac Boakye
- Research & Development Unit, Komfo Anokye Teaching Hospital, Kumasi, Ghana
| | - Alioune Camara
- Department of Medical Sciences, Faculty of Health Sciences and Techniques, Gamal Abdel Nasser University of Conakry, Conakry, Guinea
| | - Lisa Eisenbeis
- Ministry of Health, Government of Alberta, Edmonton, Alberta, Canada
| | - Eleny Guimarães-Teixeira
- Department of Internal Medicine, Faculdade de Medicina do IDOMED/Estacio, Rio de Janeiro, Brazil
- Department of Internal Medicine, Escola de Medicina da Fundação Souza Marques, Rio de Janeiro, Brazil
| | - Oumou Sow
- Department of Medical Sciences, Faculty of Health Sciences and Techniques, Gamal Abdel Nasser University of Conakry, Conakry, Guinea
| | - David Zielinski
- Pediatric Respirology, Montreal Children's Hospital, McGill University Health Center Research Institute, Montreal, Quebec, Canada
| | - Jonathon R Campbell
- Departments of Medicine & Global and Public Health, Faculty of Medicine and Health Sciences, McGill University, Montreal, Quebec, Canada
- McGill International TB Centre, Research Institute of the McGill University Health Center, Montreal, Quebec, Canada
- Respiratory Epidemiology and Clinical Research Unit, Centre for Outcomes Research & Evaluation, Research Institute of the McGill University Health Centre, Montreal, Quebec, Canada
| | - Dick Menzies
- McGill International TB Centre, Research Institute of the McGill University Health Center, Montreal, Quebec, Canada
- Respiratory Epidemiology and Clinical Research Unit, Centre for Outcomes Research & Evaluation, Research Institute of the McGill University Health Centre, Montreal, Quebec, Canada
- Montreal Chest Institute, Research Institute of the McGill University Health Center, Montreal, Quebec, Canada
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