Characteristics of Intervention and Control Patients
| Characteristic | Control Population (n = 2,250) No. (%) | Intervention Population (n = 2,250) No. (%) | Intervention Population Subgroup Analysis | |
|---|---|---|---|---|
| Nonusers (n = 1,872) No. (%) | Usersa (n = 378) No. (%) | |||
| Age, years | ||||
| 18–34 | 446 (19.8) | 444 (19.7) | 413 (22.0) | 31 (8.2) |
| 35–49 | 675 (30.0) | 677 (30.1) | 580 (31.0) | 97 (25.7) |
| 50–64 | 676 (30.0) | 676 (30.0) | 524 (28.0) | 152 (40.2) |
| 65–75 | 453 (20.1) | 453 (20.1) | 355 (19.0) | 98 (25.9) |
| Sex | ||||
| Male | 1125 (50.0 | 1,126 (50.0) | 915 (48.9) | 211 (55.8) |
| Female | 1125 (50.0) | 1,124 (50.0) | 957 (51.1) | 167 (44.2) |
| Raceb | ||||
| White | 1,251 (79.6) | 1,206 (79.2) | 923 (78.1) | 283 (83.5) |
| African American | 93 (6.0) | 100 (6.6) | 78 (6.6) | 22 (6.5) |
| Asian | 149 (9.4) | 145 (9.5) | 120 (10.1) | 25 (7.4) |
| Other | 63 (4.0) | 51 (3.4) | 42 (3.6) | 9 (2.6) |
| Unknown | 16 (1.0) | 19 (1.3) | 19 (1.6) | 0 (0.0) |
| Hispanic ethnicityb | ||||
| Hispanic | 95 (6.0) | 90 (5.9) | 81 (6.9) | 9 (2.7) |
| Non-Hispanic | 1,477 (94.0) | 1,431 (94.1) | 1,101 (93.1) | 330 (97.3) |
| Educationb | ||||
| College or higher | 777 (67.7) | 735 (64.5) | 540 (62.8) | 195 (69.9) |
| Less than college | 371 (32.3) | 404 (35.5) | 320 (37.2) | 84 (30.1) |
| Comorbidities | ||||
| Diabetes | 208 (9.2) | 192 (8.5) | 153 (8.2) | 39 (10.3) |
| Cancer | 68 (3.0) | 75 (3.3) | 55 (2.9) | 20 (5.3) |
| Coronary artery disease | 96 (4.3) | 98 (4.4) | 75 (4.0) | 23 (6.1) |
| Hyperlipidemia | 733 (32.6) | 696 (30.9) | 544 (29.1) | 152 (40.2) |
| Hypertension | 646 (28.7) | 634 (28.2) | 488 (26.1) | 146 (38.6) |
| Use Internet at least once per dayb | 868 (75.6) | 839 (73.7) | 614 (71.4) | 225 (80.7) |
↵a There were statistically significant differences between users and nonusers for age (P <.001), sex (P=.02), ethnicity (P=.04), education (P = .03), percentage with cancer (P = .03), percentage with hyperlipidemia (P <.001), percentage with hypertension (P <.001), and Internet use (P=.002).
↵b Only includes survey respondents, as data were not available in the electronic health record.