Skip to main content
. Author manuscript; available in PMC: 2021 Jul 27.
Published in final edited form as: Conn Med. 2018 Mar;82(3):133–137.

Table 2.

Incidence Rates by Serological Test Result

HIV Hepatitis B Hepatitis C
Number of susceptible individuals at baseline 442 199 267
Number (and percent) of susceptible individuals with follow-up 190 (43.0%) 67 (33.7%) 99 (37.1%)
Number of seroconversions 1 1 11
Total exposure time (months)* 3062.4 962.5 1461.7
Incidence rate (per 100 person-years) 0.39 1.25 9.03
95% Confidence interval 0.01 – 2.16 0.22 – 6.69 5.14 – 15.29
*

Exposure time was measured as the number of months between baseline and follow-up visits for study participants negative for a given viral infection at baseline. For those who seroconverted, half of the period between baseline and first seropositive visit was used in calculating total exposure time.