Univariate and multivariate analyses of risk factors for HIV seroconversion among HIV-negative participants during follow-up HIV discordant couples in rural Yunnan, China, 2009–2011.

PY: Person years; HR: Hazard ratio; CI: Confidence interval (95%).*Only those already on ART at baseline or started ART before the midpoint were considered to be receiving ART for the purposes of univariate and multivariate analyses.†“No sex” category was excluded because there were no seroconverters among participants who reported having had no sex with spouses in past 12 months at follow-up.