Table 2. Weighted odds of using each of the 10 patient portal functions by frequency of use and perceived usefulness of patient portals to monitor one's health.

Patient portal function
	Request corrections ( n  = 1,632) OR (95% CI)	Add health info ( n  = 1,635) OR (95% CI)	Download health info ( n  = 1,640) OR (95% CI)	Make decisions ( n  = 1,637) OR (95% CI)	Monitor health ( n  = 757) OR (95% CI)	Make appointments ( n  = 764) OR (95% CI)	Complete paperwork ( n  = 1,638) OR (95% CI)	Request refills ( n  = 1,638) OR (95% CI)	Message providers ( n  = 1,636) OR (95% CI)	View test results ( n  = 845) OR (95% CI)
Frequency of use
1–2 ( n  = 966)	Ref.	Ref.	Ref.	Ref.	Ref.	Ref.	Ref.	Ref.	Ref.	Ref.
3–5 ( n  = 646)	2.4 (1.2–4.8)	2.5 (1.5–4.1)	1.3 (0.8–2.1)	2.1 (1.3–3.3)	1.5 (0.7–3.2)	2.6 (1.5–4.6)	1.8 (1.2–2.9)	1.6 (1.1–2.3)	3.3 (2.3–4.7)	2.6 (1.0–6.8)
6–9 ( n  = 204)	4.8 (1.9–12.3)	5.4 (3.2–9.1)	1.7 (0.9–3.2)	3.8 (2.1–6.7)	4.6 (1.7–12.3)	2.9 (1.3–6.7)	3.0 (1.8–5.0)	3.2 (1.9–5.3)	6.6 (3.5–12.5)	19.7 (7.4–52.2)
≥10 ( n  = 203)	8.0 (3.8–16.8)	6.0 (3.3–10.8)	3.8 (2.3–6.5)	7.1 (4.1–12.5)	3.8 (1.2–12.0)	4.7 (1.7–13.0)	3.1 (1.8–5.4)	5.5 (3.0–9.9)	4.6 (2.5–8.5)	12.4 (0.1–1894.6)
Usefulness
Not at all/not very useful ( n  = 179)	Ref.	Ref.	Ref.	Ref.	Ref.	Ref.	Ref.	Ref.	Ref.	Ref.
Somewhat ( n  = 831)	0.6 (0.1–3.1)	1.7 (0.7–4.1)	1.7 (0.8–3.6)	1.4 (0.6–3.4)	2.4 (0.5–11.3)	1.3 (0.3–4.9)	1.3 (0.8–2.3)	1.9 (0.9–3.9)	2.1 (1.1–3.8)	2.5 (0.8–7.6)
Very ( n  = 833)	1.4 (0.3–6.9)	3.8 (1.4–10.0)	2.1 (0.9–4.8)	3.2 (1.3–8.1)	7.6 (1.9–30.1)	3.3 (0.9–12.8)	2.1 (1.2–3.6)	3.1 (1.5–6.6)	4.5 (2.5–8.0)	5.3 (1.4–19.7)

Abbreviations: CI, confidence interval; OR, odds ratio; Ref, reference category.

Note: All models control for all sociodemographic characteristics (i.e., gender, age, education, income, metropolitan status, insurance status, number of conditions, and last routine checkup).