Sample descriptive statistics.

The denominator of the proportions for ‘This Sample’ are based on the full sample, ranging from 1012 to 1017 to account for some missing responses.** The risk question was posed as: “Do you consider yourself at high medium, low, or no risk of getting HIV or becoming re-infected?” No further quantification was provided and therefore was the individuals subjective valuation of these categories. Risk is an ordinal variable that is used as a cardinal measure in the model estimates, valued as 0 for ‘No risk’ to 3 for ‘High risk’.