TABLE 2.

Adjusted ORs for Hepatitis C Virus Antibody Testing During Visits for Screening-eligible Birth Cohort Members in Intervention Versus Control Sites (n = 25,620)

	OR (95% CI)	P
Study arm
Control	Ref.
Intervention	8.99 (7.57–10.7)	< 0.0001
Age (y)
49–54	Ref.
55–64	0.96 (0.85–1.07)	0.46
≥65	0.98 (0.84–1.14)	0.76
Patient sex, male	1.27 (1.15–1.41)	< 0.0001
Race
White, non-Hispanic	Ref.
Black, non-Hispanic	0.76 (0.64–0.91)	0.002
Hispanic	0.81 (0.67–0.97)	0.02
Other	0.79 (0.66–0.96)	0.02
Median income by zip code
≥$108,000	Ref.
$93,000–$107,999	1.20 (1.02–1.41)	0.02
$65,000–$92,999	1.54 (1.33–1.79)	< 0.0001
< $65,000	1.06 (0.89–1.26)	0.54
Insurance
Private	Ref.
Medicare	0.65 (0.56–0.76)	< 0.0001
Medicaid/uninsured	0.53 (0.42–0.66)	< 0.0001
Practice setting
Hospital-faculty practice	Ref.
Hospital-clinic	0.51 (0.43–0.61)	< 0.0001
Community-faculty practice	0.06 (0.05–0.07)	< 0.0001
# EHR alerts presented to the physician
1–2	Ref.
3–5	1.36 (1.12–1.66)	0.002
≥6	1.12 (0.91–1.39)	0.29
# Diagnosis codes listed for the visit
0–2	Ref.
3–5	1.10 (0.96–1.26)	0.19
6–8	1.01 (0.87–1.8)	0.90
≥9	1.00 (0.86–1.17)	0.97
# Blood tests ordered during visit*
0	Ref.
1–4	5.01 (4.19–5.99)	< 0.0001
≥5	11.2 (9.42–13.3)	< 0.0001
# Orders other than blood tests placed during visit†	Ref.
0	1.77 (1.54–2.04)
1–3	3.39 (2.87–4.00)	< 0.0001
≥4		< 0.0001
Level of service coded for visit
Established/low-moderate complexity	Ref.
Established/high complexity	1.45 (1.28–1.65)	< 0.0001
New/low-moderate complexity	1.98 (1.62–2.41)	< 0.0001
New/high complexity	1.81 (1.33–2.46)	0.0001

^*Excludes hepatitis C virus antibody and RNA testing.

^†Orders for referrals, procedures, medications, supplies, and any testing except blood testing.

CI indicates confidence interval; EHR, electronic health record; OR, odds ratios; Ref., reference.