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. 2015 May;24(5):295–302. doi: 10.1136/bmjqs-2014-003800

Table 3.

Rates of infectious disease testing before and after exposure

HCV HIV HBV
Pre. Exp. Diff. Pre. Exp. Diff. Pre. Exp. Diff.
Unadjusted notification effect
 Exposure 8.8% 83.2% 74.4 3.8% 82.8% 79.0 5.6% 82.9% 77.3
 Control 6.8% 8.6% 1.8 2.3% 4.9% 2.6 4.5% 5.4% 1.0
 Difference 2.0 74.6 72.6** 1.6 77.9 76.3** 1.1 77.4 76.3**
Adjusted notification effect
 Marginal effect (percentage points) 73.2** 76.8** 77.1**
 Overall AOR (95% CI) 49.7 (41.2 to 60.0)** 103.8 (78.1 to 137.9)** 88.4 (70.4 to 111.0)**
 African–American AOR (95% CI) 0.74 (0.61 to 0.89)* 0.46 (0.37 to 0.56)** 0.66 (0.54 to 0.81)**
 Marginal effect for African–American patients† −5.0* −14.1** −6.6**

Models control for patient-level clustering.

*p<0.001; **p<0.0001.

†Marginal effects represent the predicted percentage point difference between African-American and white Veterans at the means of the other covariates.

AOR, adjusted ORs; HBV, hepatitis B virus; HCV, hepatitis C virus.