Table 2.

Pre-post knowledge scores increased for 12 out of 14 items.

Question	Pretest percentage correct	Posttest percentage correct	Change
HIV knowledge test (n = 11)
Using vaseline or baby oil with condoms lowers the chance of getting HIV	72.73	63.64	p = 0.676
If you have sex without a condom, you’re at risk for HIV—you don’t have to inject drugs or be gay to get HIV	81.82	90.91	p = 0.588
HIV test results can be available in 20 min	63.64	100	p = 0.038*
HIV testing can be done without drawing blood	72.73	100	p = 0.082
HCV knowledge test (n=10)
Studies show that more than 60% of people who inject street drugs are infected with hepatitis C	90	100	p = 0.343
People can live with hepatitis C for many years without knowing that they have been infected with the virus	60	100	p = 0.037*
Using “new” (i.e., never used before) needles, syringes, and equipment reduces the risk of being infected with hepatitis C	90	100	p = 0.343
Hepatitis C can be given to someone during sexual intercourse	90	100	p = 0.343
Once someone’s hepatitis C virus has been completely treated and cleared, that person cannot get reinfected with hepatitis C	60	90	p = 0.193
Overdose prevention knowledge test (n = 10)
Using heroin with other substances, such as alcohol or sleeping pills can increase the risk of a heroin (opioid) overdose	80	80	p = 1
Using heroin again soon after release from prison can increase the risk of a heroin (opioid) overdose	50	90	p = 0.037*
Slow or shallow breathing might indicate an opioid overdose	90	90	p = 1
When managing an opioid overdose a person should call an ambulance	80	100	p = 0.168
When managing an opioid overdose a person should give naloxone (opioid overdose antidote)	70	90	p = 0.343