Table 2.
Comparison of patient, structural, and research center characteristics by portal access and associated adjusted odds ratios for accessing the portal at least once during the 35-week preimplementation study perioda
| Patient, structural, and research center factors (N = 28 942) | Did not access portal, No. (%) (n = 10 061) | Accessed portal at least once, No. (%) (n = 18 881) | Overall Pb | Adjusted odds ratio (95% confidence interval) |
|---|---|---|---|---|
| Patient-level characteristics | ||||
| Age, y | <.0001 | |||
| 18 to <40 | 331 (3.3) | 1159 (6.1) | 2.56 (2.21 to 2.98)f | |
| 40-65 | 3276 (32.6) | 8658 (45.9) | 1.81 (1.68 to 1.97)f | |
| >65 | 6454 (64.1) | 9064 (48.0) | (Referent) | |
| Employment | <.0001 | |||
| Employed | 2312 (23.0) | 7542 (39.9) | (Referent) | |
| Not working for pay or other | 1607 (16.0) | 2506 (13.3) | 0.41 (0.38 to 0.45)f | |
| Retired | 6142 (61.0) | 8833 (46.8) | 0.64 (0.59 to 0.7)f | |
| Ethnic identification | .003 | |||
| Hispanic or Latino | 196 (1.9) | 299 (1.6) | 0.72 (0.59 to 0.9)d | |
| Non-Hispanic or Latino | 9865 (98.1) | 18 582 (98.4) | (Referent) | |
| Sex | <.0001 | |||
| Female | 5781 (57.5) | 11 722 (62.1) | (Referent) | |
| Male | 4290 (42.5) | 7159 (37.9) | 0.85 (0.8 to 0.89)f | |
| No. of days with qualifying encounters in 35-wk study period | <.0001 | |||
| 0-5 | 4581 (45.5) | 6410 (33.9) | (Referent) | |
| 6-10 | 1873 (18.6) | 3963 (21.1) | 1.69 (1.58 to 1.81)f | |
| 11-20 | 1869 (18.6) | 4149 (22.0) | 1.88 (1.75 to 2.02)f | |
| 21-30 | 831 (8.3) | 1977 (10.5) | 2.09 (1.91 to 2.3)f | |
| >30 | 907 (9.0) | 2362 (12.5) | 2.33 (2.13 to 2.55)f | |
| Racial identificationc | <.0001 | |||
| Asian | 128 (1.3) | 270 (1.4) | 0.82 (0.65 to 1.03) | |
| Black or African American | 332 (3.3) | 359 (1.9) | 0.38 (0.32 to 0.44)f | |
| White | 9403 (93.5) | 18 012 (95.4) | (Referent) | |
| Other | 198 (2.0) | 240 (1.3) | 0.55 (0.44 to 0.68)f | |
| Structural characteristics | ||||
| Broadband access | <.0001 | |||
| <85% of neighborhood | 6843 (68.0) | 10 396 (55.1) | 0.72 (0.67 to 0.76)f | |
| >85% of neighborhood | 3218 (32.0) | 8485 (44.9) | (Referent) | |
| Residence | .01 | |||
| Metropolitan/urban | 4984 (49.5) | 11 381 (60.3) | (Referent) | |
| Micropolitan/large rural | 1989 (19.8) | 3138 (16.6) | 0.97 (0.9 to 1.04) | |
| Small town/small rural/rural | 3088 (30.7) | 4362 (23.1) | 0.9 (0.84 to 0.97)d |
a
All models were adjusted for research center.
b
Threshold for statistical significance was P < .01.
c
Other race included Native American, Native Hawaiian/Pacific Islander, and those who self-identified as other.
d
P < .01.
e
P < .001.
f
P < .0001.