For both HIV+ and uninfected, AUDIT-C characterized a higher proportion of individuals as alcohol exposed (AUDIT-C >0) compared to PEth (≥8 ng/mL) (58% vs. 36% for HIV+; 55% vs. 38% for uninfected). Additionally, AUDIT-C characterized a higher proportion of individuals as drinking unhealthy levels of alcohol (AUDIT-C ≥4 for men/3 for women) compared to (PEth ≥50) (23% vs. 17% for HIV+; 26% vs. 21% for uninfected) (Table 1). Comparing AUDIT-C and PEth, the proportion with positive PEth (i.e. ≥8 ng/mL) increased as AUDIT-C increased. Among those who reported alcohol use (AUDIT-C>0), median PEth increased with increasing AUDIT-C (Table 2). Approximately 43% (1015/2344) of participants self-reported past-year abstinence (AUDIT-C=0). However, 15% (149/1015) of these individuals had PEth ≥8 ng/mL suggesting very recent alcohol consumption (Table 2). Similarly, in the restricted sample 43% (291/682) reported abstinence, and 12% of these (33/291) had PEth ≥8 (Table 2), thus corroborating results from the full sample.
