Risk-Based Prenatal Hepatitis C Testing Practices and Results, Alaska 2013-2016

Table 1

Raw and adjusted odds ratios for documented exposure to hepatitis C among women who delivered infants, 2013-2016.

Risk Factor	Level	% Known HCV Exposure	Univariate Results		Multivariate Results
			Odds Ratio	P-value	Odds Ratio	P-value
		(n/N)	[95% CI]		[95% CI]
All Mothers
Age at delivery (in years)	< 25	1.2% (11/945)	ref	0.01	ref	0.049
	25 – 29	2.5% (23/926)	2.2 [, 4.5]		2.0 [, 4.3]
	30 - 34	2.7% (17/632)	2.3 [, 5.0]		2.7 [, 6.1]
	≥ 35	3.1% (11/353)	2.7 [, 6.1]		3.1 [, 7.6]
Injection Drug Use	Yes	18.5% (30/162)	18.9 [, 32.1]	<.0001	12.4 [, 21.9]	<.0001
	No	1.2% (32/2694)	ref		ref
Tobacco Use	Yes	5.3% (23/433)	3.4 [, 5.8]	<.0001	2.0 [, 3.6]	0.02
	No	1.6% (39/2423)	ref		ref
Alcohol Use	Yes	3.9% (6/156)	1.9 [, 4.5]	0.15	Removed from model
	No	2.1% (56/2700)	ref
Late to Prenatal Care	Yes	7.9% (22/277)	5.5 [, 9.4]	<.0001	3.5 [, 6.3]	<.0001
	No	1.6% (40/2579)	ref		ref
Number of Deliveries	1	1.6% (10/608)	ref	0.01	Removed from model
	2-4	1.7% (28/1614)	1.1 [, 2.2]
	≥5	3.8% (24/610)	2.4 [, 5.0]
Nondrug abuse Mothers
Age at delivery (in years)	< 25	0.4% (4/902)	ref	0.004	ref	0.03
	25 – 29	1.2% (10/858)	2.6 [, 8.5]		2.9 [, 9.2]
	30 - 34	1.8% (11/601)	4.2 [, 13.2]		4.8 [, 15.4]
	≥ 35	2.1% (7/333)	4.8 [, 16.6]		5.4 [, 18.6]
Tobacco Use	Yes	2.7% (10/371)	2.9 [, 6.2]	0.008	2.6 [, 5.7]	0.01
	No	1.0% (22/2323)	ref		ref
Alcohol Use	Yes	4.1% (5/122)	4.0 [, 10.6]	0.01	Removed from model
	No	1.1% (27/2572)	ref
Late to Prenatal Care	Yes	3.9% (9/231)	4.3 [, 9.4]	0.001	4.5 [, 10.0]	0.0002
	No	0.9% (23/2463)	ref		ref
Number of Deliveries	1	0.9% (5/582)	ref	0.03	Removed from model
	2-4	0.9% (14/1538)	1.1 [, 3.0]
	≥5	2.3% (13/574)	2.7 [, 7.6]