Table 1.

Multivariate Bayesian Model of Hepatitis C Virus Infection Risk for Injecting Drug Users, England and Wales, 1992–2006

Variable	Odds Ratioa	95% Credible Interval
Region
London	1.00
Midlands and Wales	0.47	0.39, 0.57
North East and Yorkshire	0.45	0.36, 0.55
North West	1.67	1.41, 2.01
Southern and Eastern	0.37	0.31, 0.44
Gender
Male	1.00
Female	1.50	1.31, 1.73
Injecting duration, year(s)
<1	1.00
1	1.27	1.23, 1.34
5	2.84	2.47, 3.38
10	6.84	4.99, 9.99
15	9.11	7.39, 11.80
Age, years
20	1.00
30	1.63	1.44, 1.85
40	2.33	1.98, 2.76
50	2.90	2.23, 3.91

^aOdds ratios are presented for the mean characteristics of the study population.