Patient characteristics at intervention and control sites
| Intervention clinic (n=546 visits) | Control clinic (n=386 visits) | P value* | |
| Mean age, years (±SD) | 49.1±16.8 | 46.8±15.9 | 0.03 |
| Race/ethnicity† | 0.06 | ||
| Caucasian | 307/491 (62.5%) | 185/337 (54.9%) | |
| African American | 115/491 (23.4%) | 92/337 (27.3%) | |
| Asian | 38/491 (7.7%) | 41/337 (12.2%) | |
| Hispanic | 31/491 (6.3%) | 19/337 (5.6%) | |
| Charlson Comorbidity Index ≥2 | 82 (15.0%) | 41 (10.6%) | 0.06 |
*P values refer to t test and χ2 tests.
†Race/ethnicity was missing for 104 visits.