Table 4.

Regression of participant race, race-matching, and intervention type on virtual clinician (VC) credibility, VC attractiveness, message relevance, and colorectal cancer (CRC) screening intention

Predictor variable	VC credibility			VC attractiveness			Message relevance			CRC screening intention
	B (SE)	P*	95% CI	B (SE)	P*	95% CI	B (SE)	P*	95% CI	B (SE)	P*	95% CI
Covariates
Age	0.002 (0.008)	0.8	(−0.01, 0.02)	0.01 (0.01)	0.41	(−0.01, 0.02)	−0.03 (0.01)	<0.001	(−0.04, −0.02)	−0.02 (0.01)	<0.001	(−0.04, −0.01)
Sex (women)	0.34 (0.10)	<0.001	(0.15, 0.53)	0.58 (0.09)	<0.001	(0.41, 0.75)	0.25 (0.08)	0.002	(0.09, 0.41)	0.22 (0.08)	0.009	(0.05, 0.38)
Main effects
Black vs. white participants (ref)	0.38 (0.18)	0.04	(0.03, 0.75)	0.11 (0.16)	0.49	(−0.20, 0.41)	0.24 (0.15)	0.11	(−0.06, 0.54)	0.53 (0.15)	<0.001	(0.23, 0.84)
Matched vs. not-matched (ref)	−0.25 (0.14)	0.09	(−0.53, 0.04)	−0.34 (0.13)	0.01	(−0.61, −0.08)	−0.20 (0.13)	0.12	(−0.45, 0.05)	−0.17 (0.13)	0.18	(−0.42, 0.08)
Interactive VC vs. static VC (ref)	0.45 (0.13)	0.001	(0.19, 0.72)	0.41 (0.12)	<0.001	(0.18, 0.64)	0.26 (0.11)	0.02	(0.04, 0.48)	0.14 (0.11)	0.22	(−0.08, 0.36)
Interactions
VC type × race-matching	−0.14 (0.19)	0.47	(−0.51, 0.24)	−0.19 (0.17)	0.26	(−0.52, 0.14)	0.12 (0.16)	0.45	(−0.20, 0.44)	0.11 (0.16)	0.51	(−0.21, 0.43)
VC type × participant race	0.16 (0.22)	0.48	(−0.28, 0.60)	0.07 (0.18)	0.69	(−0.28, 0.42)	−0.16 (0.17)	0.35	(−0.50, 0.18)	0.02 (0.18)	0.92	(−0.32, 0.36)
Race-matching × participant race	0.56 (0.22)	0.01	(0.12, 1.00)	0.93 (0.18)	<0.001	(0.58, 1.29)	0.47 (0.18)	0.01	(0.13, 0.82)	0.29 (0.18)	0.1	(−0.05, 0.64)

Abbreviation: VC, virtual clinician. CRC, colorectal cancer.

^*Regression analyses. All statistical tests were two-sided. B = unstandardized beta-coefficient; CI = confidence interval.