Table 3.

Crude and adjusted mean differences in trust and confidence score estimated from linear regression models^a

		Unadjusted mean score difference on 0–100 scale (95% CI)	P-value	Adjusted mean score difference on 0–100 scale (95% CI)^b	P-value
Length of consultation (per minute)		0.07 (−0.23 to 0.37)	0.653	0.07 (−0.27 to 0.41)	0.681

Patient gender	Male	Reference	0.453	Reference	0.679
Patient gender	Female	−1.08 (−3.91 to, 1.74)	0.453	−0.52 (−2.97 to 1.93)	0.679

Patient age	18–24	Reference		Reference
	25–34	−2.74 (−10.61 to 5.13)		−3.58 (−12.01 to, 4.86)
	35–44	1.81 (−5.50 to 9.11)		1.30 (−6.58 to 9.18)
	45–54	1.24 (−6.23 to 8.70)		1.53 (−7.01 to 10.07)
	55–64	4.05 (−2.51 to 10.62)	0.004	4.25 (−3.32 to 11.82)	0.003
	65–74	5.25 (−0.77 to 11.27)		5.38 (−1.39 to 12.14)
	75–84	5.61 (−0.50 to 11.73)		6.38 (−0.94 to 13.70)
	≥85	3.03 (−6.75 to 12.81)		1.74 (−7.29 to 10.77)

Patient self-rated health	Excellent	Reference		Reference
	Very good	−2.68 (−6.30 to 0.95)		−4.64 (−9.16 to −0.11)
	Fair	−5.32 (−10.09 to −0.54)	0.163	−7.74 (−13.77 to −1.71)	0.068
	Poor	−3.65 (−8.15 to 0.86)		−7.17 (−12.91 to −1.43)
	Very poor	−6.46 (−14.44 to 1.52)		−9.33 (−18.10 to −0.57)

Patient ethnicity	White	Reference	0.547	Reference	0.738
Patient ethnicity	Non-white	2.41 (−5.42 to 10.23)	0.547	1.51 (−7.35 to 10.38)	0.738

Doctor gender	Male	Reference	0.847	Reference	0.807
Doctor gender	Female	0.42 (−3.84 to 4.67)	0.847	0.52 (−3.66 to 4.70)	0.807

↵a This is the average difference in score on a 0–100 scale between groups or attributable to an additional minute of consultation length either with or without adjustment for other factors.
↵b Mean score adjusted for patient gender, age, self-rated health, ethnicity, and doctor gender.