Appendix Table 2. Correlates of mHealth Use Among Smartphone Owners

	Unadjusted Models			Multivariate Model^* (n = 498)
	Patients (n)	OR (95% CI)	P Value	Adjusted OR (95% CI)	P Value
Age (years)	473
18–24		Reference		Reference
25–34		0.83 (0.43–1.59)	.58	0.83 (0.42–1.61)	.58
35–44		0.72 (0.37–1.42)	.35	0.71 (0.35–1.43)	.33
45–54		0.41 (0.21–0.83)	.01	0.43 (0.21–0.89)	.02
55–64		0.26 (0.12–0.56)	.001	0.26 (0.12–0.6)	.001
≥65		0.17 (0.05–0.57)	.004	0.19 (0.05–0.68)	.011
Sex
Male		Reference		Reference
Female	471	1.77 (1.14–2.74)	.01	1.59 (0.99–2.55)	.06
Race/ethnicity	476
White		Reference		Reference
Native American		3.51 (0.43–28.75)	.24	3.02 (0.38–24.18)	.30
Asian/Pacific Islander		0.95 (0.35–2.59)	.93	0.88 (0.3–2.57)	.81
African American		0.44 (0.15–1.29)	.13	0.36 (0.11–1.1)	.07
Latino		1.77 (0.70–4.44)	.23	1.43 (0.55–3.73)	.47
Other/multiracial		1.49 (0.65–3.38)	.35	1.21 (0.51–2.85)	.67
Any health literacy limitation	464	1.2 (0.79–1.81)	.39	1.2 (0.77–1.88)	.43
Any chronic medical condition	493	0.95 (0.64–1.41)	.81	1.2 (0.77–1.88)	.41
Depression	436	1.28 (0.83–1.99)	.27	1.2 (0.75–1.94)	.44

All models are adjusted for clustering within clinics.
↵* The multivariate model reports results from a single model that includes all of the independent variables in the table. Multiple imputation was used for missing variables in the multivariate model.
CI, confidence interval; OR, odds ratio.