Table 3.

Multivariate Odds of Any Use and Active Use of the Patient-Portal at an Academic General Internal Medicine Practice Clustered by Physician (May 1, 2014–April 30, 2015)

	Odds of use N = 17,699	Odds of active use N = 9443
	Adjusted OR (95% CI)	Adjusted OR (95% CI)
Physician type
Attending (Ref)	1.0	1.0
Resident	0.55 (0.51, 0.59)	0.74 (0.65, 0.84)
Age
< 50	0.75 (0.69, 0.81)	0.77 (0.69, 0.86)
50–64 (Ref)	1.0	1.0 (ref)
65–74	1.26 (1.12, 1.40)	1.33 (1.12, 1.58)
75+	0.65 (0.57, 0.74)	0.96 (0.77, 1.19)
Patient gender
Male (Ref)	1.0	1.0
Female	1.16 (1.09, 1.24)	1.10 (1.00, 1.22)
Ethnicity
White, non-Latino (Ref)	1.0	1.0
Asian/API	0.83 (0.76, 0.90)	0.68 (0.60, 0.77)
Black, non-Latino	0.32 (0.28, 0.36)	0.72 (0.58, 0.90)
Latino/Hispanic	0.52 (0.46, 0.59)	0.84 (0.79, 1.03)
Other race/ethnicity	0.65 (0.59, 0.72)	0.90 (0.77, 1.06)
Primary language
English (Ref)	1.0	1.0
Non-English/unk/declined	0.45 (0.40, 0.50)	0.51 (0.43, 0.61)
Insurance status
Commercial (Ref)	1.0	1.0
Medicaid	0.45 (0.40, 0.51)	0.86 (.70, 1.06)
Medicare	0.52 (0.47, 0.58)	0.91 (.77, 1.08)
Medicare/Medicaid	0.33 (0.26, 0.41)	0.88 (.58, 1.34)
Clinic visits	1.10 (1.08, 1.11)	1.17 (1.14, 1.20)
Patient zip code
San Francisco zip code (Ref)	1.0	1.0
Non-San Francisco zip code	1.20 (1.12, 1.29)	1.09 (0.98, 1.20)