Supported Employment COVID-19 Rapid Testing for PWID

Participant well-being was computed as the mean of eight items with a 7-point response option (1 = strongly disagree, 7 = strongly agree). The internal consistency, as measured with Cronbach's alpha (α), was .90, scores could range from 1 to 7, and higher scores indicated greater levels of well-being.

Health communication self-efficacy was computed as the mean score of 14 items with a 5-point response option (1 = strongly disagree, 5 = strongly agree). The internal consistency, as measured with Cronbach's alpha (α), was .97; scores could range from 1 to 5, and higher scores indicated greater self-efficacy.

Peer support self-efficacy, an Aim 1 measure, was computed as the mean score of 18 items with a 5-point response option (1 = not at all confident, 5 = very confident). The internal consistency, as measured with Cronbach's alpha (α), was .96; scores could range from 1 to 5, and higher scores indicated greater self-efficacy.

COVID-19 knowledge was computed as the number of correctly endorsed items. Five items were presented to test knowledge of COVID-19. Scores could range from 0 to 5, and higher scores indicate greater levels of COVID-19 knowledge.

HIV knowledge was computed as the number of correctly endorsed items. Four items were presented to test understanding of HIV. Scores could range from 0 to 4, and higher scores indicate greater levels of HIV knowledge.

Hepatitis C knowledge was computed as the number of correctly endorsed items. Five items were presented to test understanding of HIV. Scores could range from 0 to 5, and higher scores indicate greater levels of hepatitis C knowledge.

Syphilis knowledge was computed as the number of correctly endorsed items. Five items were presented to test understanding of HIV. Scores could range from 0 to 5, and higher scores indicate greater levels of Syphilis knowledge.

Naloxone knowledge was computed as the number of correctly endorsed items. Five items were presented to test understanding of HIV. Scores could range from 0 to 5, and higher scores indicate greater levels of naloxone knowledge.

Harm reduction risk behaviors included behaviors that occurred in the past month, and a higher score indicated greater levels of risky behavior. The injected drugs score was the total number of times a person reported they had injected drugs.

Harm reduction risk behaviors included behaviors that occurred in the past month. The needle use score was a count of number of times they used a needle after someone else had used it (0 = none, 5 = more than 10 times), number of different people who used a needle before they had (0 = none, 5 = more than 10 times), number of times someone used a needle after they had (0 = none, 5 = more than 10 times), and before using needles how often they used bleach to clean the needles (0 = don't reuse, 5 = never). Scores could range from 0 to 20, and a higher score indicated a greater level of needle risky behaviors.

Harm reduction risk behaviors included behaviors that occurred in the past month. The intercourse score was a count of the number of people a person had sex within the last month (0 = none, 5 = more than 10 people), the number of times a person used condoms when having sex with regular partner(s) in the last month (0 = no regular partner, 6 = never), how often they used condoms when they paid for sex (0 = not paid sex, 5 = never), how often they used condoms when having sex with casual partners (0 = no casual partners, 5 = never), and how many times they had anal sex in the last month (0 = 0 times, 5 = more than 5 times). Scores could range from 0 to 26, and a higher score indicated a greater level of intercourse risky behaviors.