Table 3.

Tuberculosis Incidence Rates According to Time Since Antiretroviral Therapy Initiation

Time Interval1	TB diagnoses	Person-years	Incidence rate per 100000 (PY)	95% CI2	Cumulative incidence rate per 100000 PY	95% CI2
HAART initiation <1 month	8	3152	254	109–500	254	109–500
>1 month–< 3 months	12	6137	196	101–342	215	131–333
>3 months–≤ 6 months	13	8906	146	78–250	181	125–255
>6 months–≤ 1 year	16	16801	95	54–155	140	103–185
>1 year–≤ 2 years	21	30298	69	43–106	107	84–136
>2 years–≤ 3 years	23	26450	87	55–131	101	82–124
>3 years–≤ 4 years	17	22923	74	43–119	96	79–116
>4 years–≤ 5 years	7	19580	36	14–74	87	72–104
>5 years–≤12 years	28	64675	43	29–62	73	61–86

NOTE. CI, confidence interval; HAART, highly active antiretroviral therapy. P values for the comparison of the incidence rate for the indicated time interval versus the first 3 months after HAART initiation using a Poisson model: 3–6 months, .28; 6 months–1 year, .02; 1–2 years, <.001; 2–3 years, .003; 3–4 years, .001; 4–5 years, <.001; 5–12 years, <.001.

¹For persons with less than 1 month, 1 month accumulated.

²95% CI determined via exact Poisson probabilities.