Comparison of Study Participants and Nonparticipants
| Characteristic | Eligible Subjects (N = 550) | Participants* (N = 43) n (%) | Nonparticipants (N = 507) n (%) | P Value |
|---|---|---|---|---|
| Age group (years) | 0.99† | |||
| <50 | 174 | 12 (29.3) | 162 (32.0) | |
| 50 to 59 | 186 | 16 (39.0) | 170 (33.5) | |
| ≥60 | 188 | 13 (31.7) | 175 (34.5) | |
| Sex | 0.09‡ | |||
| Male | 279 | 16 (37.2) | 263 (51.9) | |
| Female | 271 | 27 (62.8) | 244 (48.1) | |
| Race/ethnicity | 0.05† | |||
| White (Non-Hispanic) | 289 | 27 (62.8) | 262 (51.7) | |
| Hispanic | 101 | 9 (20.9) | 92 (18.1) | |
| Black/African American | 94 | 5 (11.6) | 89 (17.6) | |
| Other | 66 | 2 (4.7) | 64 (12.6) | |
| Insurance type | 0.03‡ | |||
| HMO | 484 | 33 (76.7) | 451 (89.0) | |
| Other | 66 | 10 (23.3) | 56 (11.0) | |
| HbA1c (%)§ | 0.03† | |||
| <9.0 | 221 | 11 (25.6) | 210 (41.4) | |
| 9.0 to 9.9 | 118 | 10 (23.3) | 108 (21.3) | |
| ≥10 | 211 | 22 (51.1) | 189 (37.3) |
* May not add to total due to missing data.
† χ2 test for linear trend.
‡ Yates corrected χ2 test.
§ Baseline HbA1c for participants and the most recent HbA1c in patient's record for nonparticipants.