Household contact investigation for the detection of tuberculosis in Vietnam: economic evaluation of a cluster-randomised trial

Household contact investigation for the detection of tuberculosis in Vietnam: economic evaluation of a cluster-randomised trial.

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Item Type: Article
Status: Published
Official URL:
Journal or Publication Title: The Lancet Global Health
Volume: 7
Number: 3
Page Range: e376-e384
Date: 2019
Divisions: Tuberculosis
Depositing User: General Admin
Identification Number: 10.1016/S2214-109X(18)30520-5
ISSN: 2214109X
Date Deposited: 11 Dec 2020 05:18

Background: Active case finding is recommended as an important strategy to control tuberculosis, particularly in low-income and middle-income countries with a high prevalence of the disease. However, the costs and cost-effectiveness of active case finding are unclear due to the absence of evidence from randomised trials. We assessed the costs and cost-effectiveness of an active case finding strategy in Vietnam, where there is a high prevalence of tuberculosis.

Methods: We conducted an economic evaluation alongside the Active Case Finding in Tuberculosis (ACT2) trial-a pragmatic cluster-randomised controlled trial in 70 districts across eight provinces of Vietnam. Patients aged 15 years and older with smear-positive pulmonary tuberculosis were recruited to the trial if they lived with one or more other household members. Household contacts were verbally invited to the clinic by the index patient with tuberculosis. ACT2 compared a combination of active and passive case finding with usual care (passive case finding) of household contacts of patients with tuberculosis from a health system perspective. Clustering occurred at the district and household level. Districts were the unit of randomisation, and we used minimisation to ensure balance of intervention and control districts within each province. In the intervention group, participants were invited to attend screening at baseline, 6 months, 12 months, and 24 months. We determined health-care costs with a standardised national costing survey and reported results in 2017 $US. The primary outcome of our study was disability-adjusted life years (DALYs) averted over a 24-month period. ACT2 was registered prospectively with the Australian and New Zealand Clinical Trials Registry, number ACTRN126.100.00600044.

Findings: Between Aug 11, 2010, and Aug 11, 2015, 10 964 index patients and 25 707 household contacts completed the ACT2 study. There were 10 069 household contacts in the intervention group and 15 638 household contacts in the control group. The incremental cost-effectiveness ratio per DALY averted was $544 (330-1375).

Interpretation: Active case finding was shown to be highly cost-effective in a setting with a high prevalence of tuberculosis. Investment in the wide-scale implementation of this programme in Vietnam should be strongly supported.

Funding: Australian National Health and Medical Research Council.

Copyright © 2019 The Author(s). Published by Elsevier Ltd. This is an Open Access article under the CC BY-NC-ND 4.0 license. Published by Elsevier Ltd.. All rights reserved.

Lung, Thomas
Marks, Guy B
Nhung, Nguyen Viet
Anh, Nguyen Thu
Hoa, Nghiem Le Phuong
Anh, Le Thi Ngoc
Hoa, Nguyen Binh
Britton, Warwick John
Bestrashniy, Jessica
Jan, Stephen
Fox, Gregory J
Last Modified: 17 Dec 2020 02:52

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