TABLE 4.

—Independent Associations With Hepatitis C Virus Infection (Multivariate Analysis) and Associated Population Attributable Fractions for Women Aged 18 to 29 Years From Low-Income Neighborhoods of 4 Northern California Counties, April 1996–January 1998

	Adjusted OR (95% CI)	Adjusted Population Attributable Fraction (95% CI)
History of injection drug use	4.9 (2.7, 9.2)	0.332 (–0.9, 0.8)
Herpes simplex virus type 2	3.7 (1.2, 11.5)	0.506 (–13.8, 1.0)
Heroin use (ever)	5.6 (3.1, 10.2)	0.394 (–1.1, 0.8)
Cocaine use (ever)	3.4 (1.2, 9.5)	0.442 (–9.2, 1.0)
Age (< 24 vs ≥ 24)	2.5 (0.9, 7.2)
Monthly income, $
< 500	4.2 (1.2, 14.4)	0.400 (–6.4, 1.0)
500–999	1.5 (0.3, 6.9)	0.695 (–2.3, 0.7)
≥ 1000	Referent

Note. CI = confidence interval; OR = odds ratio.