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. 2009 Apr 6;38(4):997–1007. doi: 10.1093/ije/dyp171

Table 3.

ZINB models assessing changes in number of unprotected sex acts in a typical month following notification of HIV-positive status (HIV-infected participants) or randomly-assigned anchor visit (uninfected participants)

Unadjusted
Adjusteda
Analysis Population ZI OR: odds of zero UPSA 95% CI Relative change in number of UPSA 95% CI ZI OR: odds of zero UPSA 95% CI Relative change in number of UPSA 95% CI
Short term HIV positive 2.03 1.29–3.20 0.72 0.56–0.93 1.55 0.91–2.66 0.71 0.55–0.91
HIV negative 0.77 0.63–0.94 0.98 0.91–1.06 0.77 0.63–0.95 0.98 0.91–1.06
Long term HIV positive 2.19 1.28–3.74 0.60 0.44–0.81 1.99 1.12–3.53 0.62 0.45–0.84
HIV negative 0.84 0.67–1.05 1.01 0.92–1.12 0.82 0.64–1.04 1.02 0.92–1.12

aAll adjusted models control for age, country, recruitment population, prior STI during study and partner symptomatic of STI in past 3 months.

ZI = zero-inflated; OR = odds ratio; UPSA = unprotected sex acts; CI = confidence interval.