Figure.

Substance abuse treatment programs providing infection-related health services

NOTE: The sample size varies from 247 to 260. A sample size of 247 achieves 80% power to detect an effect size of 0.18 using a one degree of freedom Chi-Square test with a significance level of 0.05. An effect of 0.18 is the equivalent of at least a 0.10 difference (potentially larger depending on the values) in proportions between groups.

^a p<0.01 as compared to HIV/AIDS

^b p<0.05 as compared to HIV/AIDS

HIV = human immunodeficiency virus

AIDS = acquired immunodeficiency syndrome

HCV = hepatitis C virus

STI = sexually transmitted infection