Past Tuberculosis Diagnosis Linked to Increased Long-Term Mortality Risk for Up to 14 Years, Global Prevention Urgently Needed

The analysis of the 100 Million Brazilian database reveals that a past tuberculosis diagnosis increases the risk of death up to 14 years later regardless of treatment outcome, which should prompt urgent prioritization of global prevention efforts.

Individuals who survived tuberculosis, even after completing treatment, faced a significantly elevated risk of death from natural causes for up to 14 years following diagnosis. In the cohort of those diagnosed with tuberculosis, the risk of mortality from natural causes was 2.16 times higher than in tuberculosis-free individuals over the 14-year period. For those who completed treatment, the risk remained 1.77 times higher than the unexposed group during the same timeframe.

The elevated risk extended across multiple organ systems, with significantly increased rates of death due to cancer, cardiovascular disease, endocrine disorders, respiratory conditions, and external causes. Researchers noted that respiratory-related deaths showed particularly high risk early in the follow-up period, with a one-year risk ratio of 6.15 for respiratory deaths in the treated cohort.

These findings highlight the need for long-term monitoring of tuberculosis survivors to address lasting health impacts. Experts recommend implementing follow-up protocols that include lung function and cardiovascular screenings to mitigate the prolonged burden of the disease.

The study, published in Nature Medicine on April 22, 2026, utilized linked nationwide data from Brazil spanning 2004 to 2018. Researchers matched 185,921 individuals diagnosed with tuberculosis and 111,871 who successfully completed treatment with tuberculosis-free counterparts to analyze long-term mortality outcomes using competing risk methods.

Tuberculosis remains a major global health challenge, with approximately 10.8 million people developing the disease and 1.25 million dying from it in 2023 alone. The persistent mortality risk observed in survivors underscores the importance of integrating tuberculosis prevention and post-treatment care into broader public health strategies.