Table 1:

Demographic Information of Non-sharing and Needle-sharing PWID

	Control Donors (n=40)	Low-risk Non-sharing PWID (n=35)	High-risk Needle-sharing PWID (n=50)
Mean Age	μ= 52.4 years	μ=41.9 years	μ=41.8 years
Hepatitis B Status	N/A	23% Sero-positive	26% Sero-positive
Hepatitis C Status	N/A	69% Sero-positive	85% Sero-positive
Frequency of Opioid Injection (Last 6 months)	N/A	μ=179 events	μ=160 events
Frequency of Needle-Sharing (Last 6 months)	N/A	μ=1 event	μ=34 events
Frequency of Cocaine Injection (Last 6 months)	N/A	μ=24 events	μ=49 events
Frequency of Unprotected Intercourse (Last 6 months)	N/A	μ=43 events	μ=37 events