Skip to main content

Table 2 Comparison of TB incidence rates among patients ever on IPT against those never on IPT (N = 62,983)

From: Effect of isoniazid preventive therapy on tuberculosis incidence and associated risk factors among HIV infected adults in Tanzania: a retrospective cohort study

IPT status Number of TB cases Total person-years (TPYrs) Incidence rate (per 100pyrs) IRR (95% CI)
Never on IPT 2845 96,845 2.94 1.0
Ever on IPT 279 18,081 1.54 0.52 (0.46–0.59)
Total 3124 114,926 2.7