Additional file 1: of Accuracy and determinants of perceived HIV risk among young women in South Africa

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Logistic regression (adjusted odds ratios presented) for beliefs that an HIV positive student should not be allowed to attend school.

<p>Notes:</p><p>* p<0.05,</p><p>** p<0.01,</p><p>*** p<0.001.</p><p>Robust standard errors, stratification by province, clustered at the school level.</p

Response to an HIV-positive status of a close friend.

<p>Proportion of grade 6 students that would “avoid or shun” a close friend who revealed that they were living with HIV by gender (Figure 1A), geographic location (Figure 1B) and wealth quartile (Figure 1C) including 95% confidence interval).</p

Logistic regression (adjusted odds ratios presented) for beliefs that students would shun or avoid a close friend with HIV.

<p>Notes:</p><p>* p<0.05,</p><p>** p<0.01,</p><p>*** p<0.001.</p><p>Robust standard errors, stratification by province, clustered at the school level.</p

Beliefs that a student living with HIV should not be allowed to attend school.

<p>Proportion of grade 6 students who believed that students living with HIV should not be allowed to continue to attend school, by gender (Figure 2A), geographic location (Figure 2B) and wealth quartile (Figure 2C) including 95% confidence interval.</p

Sample characteristics.

<p>Notes:</p>a<p>The figures for the general HIV knowledge measure represent the average proportion of the 10 relevant true-or-false statements for which students reported the correct response.</p>b<p>The figures for the casual contact beliefs measure represent the average proportion of the eight relevant true-or-false statements for which students indicated that HIV could be spread via casual contact.</p>c<p>The ‘beliefs that people with AIDS are bewitched’ measure represents the proportion of students who responded “true” to the statement “A person with AIDS is bewitched.”</p

Levels of HIV discrimination by country.

<p>Levels of HIV discrimination by country.</p

Association between having heard MC was protective in 2009 and HIV risk perception and condom use in 2005.

<p>Notes: Standard deviation in parentheses.</p><p>P-values derived from two-sample differences in means or proportion test across groups.</p><p>V.</p

Adjusted association between hearing MC was protective, HIV risk perceptions and condom use behaviors – men.

<p>Notes: The coefficients for the model for Perception of HIV Risk were estimated using OLS. The coefficients in the models for the condom use variables and Riskier Unprotected Sex reflect probit marginal effects.</p><p>Robust standard errors in parentheses.</p>***<p>p<0.01, ** p<0.05, * p<0.1.</p><p>See <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0040753#pone-0040753-t001" target="_blank">Table 1</a> notes and main text for variable definitions.</p

Sample descriptive statistics.

<p>Notes: Standard deviations in parentheses.</p><p>∧The mean of binary variables – figures without a reported standard deviation – are converted to percentages by multiplying by 100: i.e. 0.34 represents 34%.</p><p>Unless otherwise indicated next to variable name, all variables are binary indicators.</p><p>Perception of HIV risk is a 0–3 scale with 0 representing no risk and 3 great risk.</p><p>Perception of HIV risk is a 0–3 scale with 0 representing no risk and 3 great risk.</p><p>Used condom at Last Sex  = 1 if the individual used a condom during the last sexual encounter.</p><p>Always/Usually Used Condoms  = 1 if the respondent reported usually or always using condoms with his/her most recent sexual partner.</p><p>Riskier Unprotected Sex  = 1 if the individual reported never or sometimes using condoms with a partner reported to be of.</p><p>unknown or positive HIV serostatus.</p><p>Per Capita Monthly Household Income is provided in Rand. During the time of survey, the exchange rate was 1 Rand  = 0.129 USD.</p><p>Previous STD refers to whether the individual had a known STD in the past or reported symptoms of dysuria, genital.</p><p>discharge, or genital sores at any time.</p><p>Concurrent Sexual Network  = 1 if the respondent reported having a concurrent sexual partner or if he/she reported that.</p><p>the last partner was in a concurrent sexual relationship, as well.</p><p>HIV Knowledge Score counted correct answers to whether HIV can be transmitted via food prepared by someone with.</p><p>HIV/AIDS, by being coughed/sneezed on, from mother to child, and whether it is possible for a healthy-looking person to have HIV.</p><p>HIV Conspiracy Belief  = 1 if the responded believed that HIV was created by humans, AIDS was created by scientists America, or that AIDS was invented to kill blacks.</p