Abstract
To assess changes in US tuberculosis (TB) incidence rates by age, period, and cohort effects, stratified according to race/ethnicity and nativity. We used US National Tuberculosis Surveillance System data for 1996 to 2016 to estimate trends through age-period-cohort models. Controlling for cohort and period effects indicated that the highest rates of TB incidence occurred among those 0 to 5 and 20 to 30 years of age. The incidence decreased by age for successive birth cohorts. There were greater estimated annual percentage decreases among US-born individuals (-7.3%; 95% confidence interval [CI] = -7.5, -7.1) than among non-US-born individuals (-4.3%; 95% CI = -4.5, -4.1). US-born individuals older than 25 years exhibited the largest decreases, a pattern that was not reflected among non-US-born adults. In the case of race/ethnicity, the greatest decreases by nativity were among US-born Blacks (-9.3%; 95% CI = -9.6, -9.1) and non-US-born Hispanics (-5.7%; 95% CI = -6.0, -5.5). TB has been decreasing among all ages, races and ethnicities, and consecutive cohorts, although these decreases are less pronounced among non-US-born individuals.
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