RESULTS
HIV self‐testing
Among HIV‐negative participants in M‐cubed who were randomly assigned to the intervention (In bivariate analyses, demographic variables, such as age or race and ethnicity, were not associated with HIV self‐test kit ordering. Among SCT variables, Behaviour (self‐reported HIV testing history), Goal Setting (plans to test for HIV) and Self‐Efficacy (self‐report likelihood of testing) were all associated with ordering a kit. Behaviour (self‐reported HIV testing history) was associated with the outcome in the past 12 months (unadjusted PR = 1.30, 95% CI: 1.08–1.57) and in the past 3 months (unadjusted PR = 1.40, 95% CI: 1.16–1.69). To reduce collinearity, we retained HIV testing only in the past 3 months in the final model (Table Adjusted prevalence ratios for final model factors predicting HIV kit ordering among gay, bisexual and other men who have sex with men in Atlanta, Detroit and New York, 2018Wald CI with a test statistic of Includes Middle Eastern, Brazilian, Indian and Asian Pacific Islander.Other SCT variables related to the design of the M‐cubed app (e.g. Knowledge, Outcome Expectations and Environment) were not associated with HIV self‐test kit ordering in the study population. Additionally, novel variables related to HIV self‐testing through harm reduction for participants engaging in online sexual partners seeking behaviours—such as the use of phone for dating apps and hours spent on the phone per day—were not significant predictors in the bivariate analysis in the study population, despite associations observed elsewhere [In our final multivariable model in Table 