. Author manuscript; available in PMC: 2015 Aug 1.

Published in final edited form as: J Epidemiol Community Health. 2015 Mar 26;69(8):745–752. doi: 10.1136/jech-2014-205224

Table 3.

GEE modelling of outcome trends over time

Outcome	HCV negative aOR^b (95% CI) p-value	HCV diagnosed aOR^b (95% CI) p-value	Interaction (time*HCV-disclosure group) p-value
Recent^a injection drug use	0.97 (0.94, 1.00) 0.051	0.95 (0.92, 0.98) 0.001	0.160
Recent syringe borrowing	0.92 (0.87, 0.97) 0.003	0.97 (0.94, 1.01) 0.096	0.187
Recent receptive sharing - other equipment	1.00 (0.97, 1.05) 0.807	0.97 (0.93, 1.01) 0.160	0.232
Recent alcohol use	0.99 (0.98, 1.02) 0.622	1.02 (1.01, 1.04) 0.012	0.023

Recent=past month or past 3-months depending on cohort

aOR = adjusted odds ratio for every 3-month increment post-baseline, adjusted for site, age, sex and baseline outcome value