Tuberculosis and increased incidence of cardiovascular disease: Cohort study using US and UK health records.

Background: Limited evidence suggests elevated risks of cardiovascular disease (CVD) among people diagnosed with tuberculosis (TB) disease, though studies have not adjusted for pre-existing CVD risk. We carried out a cohort study using two separate datasets, estimating CVD incidence in people with TB versus those without.

Methods: Using data from the United States (Veterans Health Administration) and the United Kingdom (Clinical Practice Research Datalink) for 2000-2020 we matched adults with incident TB disease and no CVD history 2-years before TB diagnosis (US n=2,121; UK n=15,820) with up to 10 people without TB on the basis of age, sex, race/ethnicity and healthcare practice. Participants were followed beginning 2-years before TB diagnosis and for 2-years subsequently. The acute period was defined as 3-months before/after TB diagnosis. TB, CVD and covariates were identified from electronic routinely collected data (primary and secondary care; mortality). Poisson models estimated incident rate ratios (IRR) for CVD events in people with TB compared to those without.

Results: CVD incidence was consistently higher in people with TB, including during the baseline period (pre-TB) and particularly in the acute period: IRRs were US 3.5 (95% Confidence Interval 2.7-4.4), UK 2.7 (2.2-3.3). Rate Ratios remained high after adjusting for differences in pre-existing CVD risk: US 3.2 (2.2-4.4), UK 1.6 (1.2-2.1).

Conclusion: Increased CVD incidence was observed in people with TB versus those without, especially within months of TB diagnosis, persistent after adjustment for differences in pre-existing risk. Enhancing CVD screening and risk management may improve long-term outcomes in people with TB.