Table 1.
Personal characteristics by substudy. Data are numbers (%) unless indicated otherwise
| Personal characteristics | Substudy A: opt in or opt out | Substudy B: content | Substudy B: mode | Substudy A+B, all participants | |||||
|---|---|---|---|---|---|---|---|---|---|
| Letter only (A1) | Letter+order (A2) | Usual care (B1, B3, B5) | Behavioral (B2, B4, B6) | Mailed letter (B1, B2) | Electronic portal (B3, B4) | ||||
| No of patients | 813 | 829 | 9828 | 9833 | 1897 | 9498 | 21 303 | ||
| Age, mean (SD) | 63.1 (6.1) | 63.1 (6.3) | 62.8 (6.1) | 62.7 (6.0) | 63.0 (6.0) | 62.9 (6.0) | 62.8 (6.0) | ||
| Sex | |||||||||
| Male | 348 (42.8) | 341 (41.1) | 4461 (45.4) | 4476 (45.5) | 843 (44.4) | 4159 (43.8) | 9626 (45.2) | ||
| Female | 465 (57.2) | 488 (58.9) | 5367 (54.6) | 5.357 (54.5) | 1054 (55.6) | 5339 (56.2) | 11 677 (54.8) | ||
| Race | |||||||||
| White | 638 (78.5) | 657 (79.3) | 7823 (79.6) | 7869 (78.9) | 1581 (83.3) | 8003 (84.3) | 16 987 (79.7) | ||
| Black | 106 (13.0) | 103 (12.4) | 1167 (11.9) | 1152 (11.7) | 164 (8.7) | 734 (7.7) | 2528 (11.9) | ||
| Asian | 21 (2.6) | 12 (1.5) | 193 (2.0) | 196 (2.0) | 46 (2.4) | 182 (1.9) | 422 (2.0) | ||
| Pacific Islander | 2 (0.3) | 2 (0.2) | 24 (0.2) | 23 (0.2) | 1 (0.1) | 13 (0.1) | 51 (0.2) | ||
| American Indian | 0 (0) | 1 (0.1) | 7 (0.1) | 6 (0.1) | 1 (0.1) | 6 (0.1) | 14 (0.1) | ||
| Other | 18 (2.2) | 26 (3.1) | 218 (2.2) | 225 (2.3) | 40 (2.1) | 203 (2.1) | 487 (2.3) | ||
| Unknown | 28 (3.4) | 28 (3.4) | 385 (3.9) | 353 (3.6) | 62 (3.3) | 342 (3.6) | 794 (3.7) | ||
| Refused | 0 (0) | 0 (0) | 11 (0.1) | 9 (0.1) | 2 (0.1) | 15 (0.2) | 20 (0.1) | ||
| Ethnicity | |||||||||
| Hispanic or Latino | 12 (1.5) | 7 (0.8) | 398 (4.1) | 406 (4.1) | 27 (1.4) | 121 (1.3) | 823 (3.9) | ||
| Non-Hispanic or non-Latino | 787 (96.8) | 807 (97.4) | 9352 (95.2) | 9357 (95.2) | 1848 (97.4) | 9304 (98.0) | 20 303 (95.3) | ||
| Unknown | 1 (0.1) | 1 (0.1) | 21 (0.2) | 23 (0.2) | 4 (0.2) | 22 (0.2) | 46 (0.2) | ||
| Refused | 13 (1.6) | 14 (1.7) | 57 (0.6) | 47 (0.5) | 18 (1.0) | 51 (0.5) | 131 (0.6) | ||
| Portal status | |||||||||
| Active | 552 (67.9) | 547 (66.0) | 5697 (58.0) | 5698 (58.0) | 1897 (100%) | 9498 (100%) | 12 494 (59) | ||
| Not active | 261 (32.1) | 282 (34.0) | 4131 (42.0) | 4135 (42.1) | — | — | 8809 (41) | ||
| Insurance cover type | |||||||||
| Commercial | 511 (62.9) | 550 (66.3) | 6408 (65.4) | 6494 (64.7) | 1264 (66.6) | 6407 (67.5) | 13 963 (65.5) | ||
| Medicare | 278 (34.2) | 257 (31.0) | 3098 (31.6) | 3012 (30.7) | 603 (31.8) | 2937 (30.9) | 6645 (31.2) | ||
| Medicaid | 22 (2.7) | 20 (2.4) | 280 (2.9) | 283 (2.9) | 28 (1.5) | 135 (1.4) | 605 (2.8) | ||
| No insurance | 2 (0.3) | 1 (0.1) | 14 (0.1) | 21 (0.2) | 2 (0.1) | 15 (0.2) | 38 (0.2) | ||
| Unknown | 0 (0) | 1 (0.1) | 28 (0.3) | 23 (0.2) | 2 (0.1) | 4 (0.04) | 52 (0.2) | ||
| Household income ($), median (IQR)* | 90 683 (67 668-103 923) | 91 929 (70 024-103 923) | 85 164 (68 785-97 452) | 87 885 (68 785-97 602) | 91 929 (70 380-101 577) | 91 332 (70 380-101 250) | 87 019 (68 785-97 602) | ||
$
1.00=£0.72, €0.83.
IQR=interquartile range; SD=standard deviation.
*
Based on American Community Survey 2013-2017 5 year estimates data. Data missing for 199 participants.