“…In one study in MSM that stratified by age, 88.5% of young men and 89.9% of older men had a >HS educational level [17]. In IDU including methadone maintenance patients, those with a <HS educational level ranged from 37% to 74% [11,13,15,18,19]; in WAHR, the range was 47% to 49% [15,20]; in WAHR-IDU, 34% had <HS educational level [15].…”