Table 2.

Logistic regression model comparing those who did not expect to be asked for consent before access to their de-identified record (base = implicit consent model) and those who did expect to be asked for consent (explicit consent model), with respect to socio-demographic factors, computer confidence, healthcare experience and awareness of EHRs. P-values and 95% confidence intervals are adjusted for clustering by sampling site (N = 3157).

	Consent for de-identified record access (base: implicit consent)
	Unadjusted OR		P	OR	Adjusted OR
	OR	95% CI			95% CI	P
Sex (base: female)
Male	0.66	(0.56,0.78)	<0.001	0.66	(0.56,0.78)	<0.001
Age (base: 25–34)
18–24	1.21	(0.86,1.72)	0.27	1.07	(0.73,1.56)	0.75
35–44	1.07	(0.93,1.23)	0.33	1.05	(0.92,1.20)	0.45
45–54	1.13	(0.90,1.41)	0.29	1.15	(0.90,1.48)	0.26
55–64	0.88	(0.61,1.26)	0.49	0.83	(0.55,1.26)	0.39
65–74	1.09	(0.83,1.45)	0.52	0.94	(0.65,1.36)	0.75
75+	1.11	(0.83,1.49)	0.48	0.79	(0.53,1.17)	0.24
Ethnicity (base: White British)
White Non-British	1.42	(1.18,1.71)	<0.001	1.46	(1.19,1.79)	<0.001
British Black	1.97	(1.45,2.66)	<0.001	1.71	(1.25,2.34)	<0.001
Asian British	1.67	(1.34,2.10)	<0.001	1.79	(1.37,2.34)	<0.001
Other	1.70	(1.40,2.06)	<0.001	1.66	(1.33,2.07)	<0.001
Education (base: higher degree)
None	1.62	(1.07,2.47)	0.02	1.41	(0.89,2.23)	0.14
GCSE	1.68	(1.21,2.32)	<0.001	1.61	(1.09,2.36)	0.02
A level	1.54	(1.33,1.77)	<0.001	1.47	(1.26,1.72)	<0.001
Vocational	1.18	(0.92,1.51)	0.19	1.09	(0.82,1.44)	0.56
Degree	0.98	(0.84,1.15)	0.83	0.97	(0.86,1.10)	0.66
Computer confidence (base: very confident)
Not confident	1.76	(1.47,2.09)	<0.001	1.65	(1.23,2.21)	<0.001
Fairly confident	1.43	(1.24,1.66)	<0.001	1.38	(1.12,1.70)	<0.001
Confident	1.07	(0.94,1.22)	0.31	1.05	(0.93,1.18)	0.47
NHS services accessed in the past 6 months (base: 0 to 2 types)
3+ types	0.94	(0.82,1.08)	0.40	0.92	(0.81,1.05)	0.21
Awareness of EHRs (base: not aware)
Aware of EHRs	0.67	(0.59,0.75)	<0.001	0.77	(0.67,0.88)	<0.001