Table 3.

Rate of portal logins over time during the study time period: full multivariable model.

Characteristic	IRR 1	95% CI 1	p-value
Week
Knot1*	1	1.00, 1.00	0.5
Knot2	0.93	0.90, 0.96	<0.001
Knot3	1.52	1.35, 1.71	<0.001
Knot4	0.47	0.40, 0.55	<0.001
Knot5	2.29	1.96, 2.68	<0.001
Knot6	0.36	0.30, 0.44	<0.001
Knot7	4.11	3.31, 5.09	<0.001
Knot8	0.27	0.23, 0.33	<0.001
Knot9	1.53	1.28, 1.82	<0.001
Age per 10 years	0.996	1.00, 1.00	<0.001
Sex (Female is the reference)
Male	1.04	1.04, 1.04	<0.001
Race (White is the reference)
Asian-Far East/Indian-Subcontinent	1.02	1.01, 1.02	<0.001
Black	0.92	0.91, 0.92	<0.001
Other	0.98	0.98, 0.99	<0.001
Ethnicity (Hispanic or Latino is the reference)
Not Hispanic	1.02	1.01, 1.02	<0.001
Primary Language (English is the reference)
Other	1.02	1.01, 1.02	<0.001
Marital Status (Partnered is the reference)
Single	0.98	0.98, 0.98	<0.001

¹ IRR = Incidence Rate Ratio, CI = Confidence Interval.

^* See Methods for description of knots.