Enhancing Tuberculosis Outcomes Through Counselling Incentives

Tuberculosis counselling incentives that combine conditional cash transfers with structured pre- and post-test counselling are proving highly effective at overcoming socioeconomic barriers to treatment adherence. This integrated strategy reduces long-term disease transmission while requiring only modest additional investment from the health system, making it a practical option for high-burden settings.

By tying financial support to specific health behaviours and pairing it with targeted counselling, tuberculosis counselling incentives directly address the socioeconomic factors that drive loss to follow-up. Patients are more likely to accept treatment, complete their course, and reduce community transmission, delivering meaningful health gains without straining public budgets.

Dynamic Model Projects 25-Year Impact

Using TBMod, an age-structured mathematical model calibrated with results from a pragmatic Johannesburg trial, researchers simulated national rollout from 2025 to 2050. The model accounts for diagnosis pathways, treatment cascades, drug resistance, and transmission dynamics, projecting outcomes against a business-as-usual scenario while remaining consistent with WHO epidemiological targets.

Accelerating Averted Cases and Cost Savings

Impact builds steadily over time. After an initially modest first-year effect, reduced untreated cases curb further spread, leading to a 10.6% drop in new TB cases and 15% fewer deaths by 2050. Across the full period the intervention averts approximately 400,000 incident cases, 200,000 deaths, and 2 million disability-adjusted life years. At an incremental cost of $289 million, the programme costs $80.40 per patient treated and yields an ICER of $144 per DALY averted—well below South Africa’s $3,314 willingness-to-pay threshold. Results remained robust even when counselling and incentive costs were increased by 50%.

Strategic Value for TB Elimination Efforts

These findings, drawn from this economic evaluation, confirm that scaling tuberculosis counselling incentives is an efficient use of public resources. The approach successfully narrows persistent gaps between diagnosis and treatment completion, supporting both national and global TB reduction targets while offering clear lessons for evaluating behavioural interventions in resource-limited settings.