Sexual behavior scores (SBSs) across visits for study groups in the UK¹ (top row) and Uganda (bottom row) cohorts.

<p>Boxplots of SBSs of concordant individuals are shown, where the midline and box represent the median ± the 25th and 75th percentiles; whiskers extend to the extreme data points that are ≤1.5 times the interquartile range. Extreme outliers are indicated by circles. ¹Note that the scales of the y-axis for UK HIV+ and HUSN are much larger than those of the other groups. *One UK HESN with a very large SBS at Visit 3 (0.126) is not shown in order to maintain a comparable scale over plots where possible.</p

Risk indexes (RIs) for HESN participants in the UK and Ugandan cohorts over 4 visits.

<p>RIs were generated based on reported sexual behaviors for the last 3 months (if concordant with answers from the HIV+ study partner), partner HIV-1 pVL, concurrent STIs, male circumcision status, and pregnancy. Boxplots of RI are shown, where the midline and box represent the median ± the 25th and 75th percentiles; whiskers extend to the extreme data points that are ≤1.5 times the interquartile range. Extreme outliers are indicated by circles.</p

The risk factors and odds ratios used to generate the risk index (RI) in the current study.

<p>The risk factors and odds ratios used to generate the risk index (RI) in the current study.</p

Summary of Study Group Characteristics for UK and Uganda.

a<p>IQR; Interquartile range.</p>b<p>No participants self-identified as bisexual, therefore those not identified as MSM are heterosexual.</p>c<p>Participants positive for Chlamydia, Gonorrhoea, GUD, Bacterial Vaginosis, Candidiasis, and/or Syphilis at any study visit, and/or reporting incidences of genital lesions/discharge/rash/itching in the 3 months preceding any study visit.</p>d<p>No pVL data available for one UK and one Ugandan HIV+ participant at visit 1.</p>e<p>Limit of detection 50 copies/ml in UK and 400 copies/ml in Uganda samples.</p>f<p>No CD4+ count data for one UK HIV+ participant at visit 1.</p

Data from visit 1 summarising key sexual behavior acts (with ejaculation and no condom use) reported within the past 3 months and the proportion of couples who were concordant in their responses across all sex acts.

a<p>NR; none reported.</p>b<p>Single data point only.</p