Comparison of characteristics of HIV-negative and HIV-positive partners at baseline and follow up relative to whether the HIV-positive partner (index case) was on ART or naïve to ART among study of HIV discordant couples in rural Yunnan, China, 2009–2011.

IQR: Inter-quartile range.
*A total of 82 HIV-positive partners (index cases) began ART during the follow-up period. At baseline, these individuals were included in the “Naïve to ART” category and at follow-up, they were included in the “On ART” category.