Table 1:
Baseline patient characteristics (%)
| Factor sample no. of patients | BIDMC, n = 6813 | GHS, n = 5858 |
|---|---|---|
| Age, mean (SD) | 51.3 (13.3) | 53.2 (14.7) |
| Percent female | 60.1 | 55.1 |
| Number of visits | ||
| June 2010 to September 2010 | 4238 (32.3) | 3562 (24.4) |
| September 2010 to December 2010 | 3357 (25.6) | 3880 (26.5) |
| December 2010 to March 2011 | 3039 (23.1) | 3568 (24.4) |
| March 2011 to June 2011 | 2491 (19.0) | 3578 (24.5) |
| Comorbidities per patient | ||
| Cardiovascular disease | 153 (2.5) | 156 (2.8) |
| Cerebrovascular disease | 78 (1.3) | 56 (1.0) |
| Chronic lung disease | 402 (6.5) | 331 (6.0) |
| Rheumatologic disease | 68 (1.1) | 49 (0.9) |
| Diabetes mellitus | 593 (9.5) | 772 (14.0) |
| Liver/kidney disease | 143 (2.3) | 120 (2.2) |
| Cancer | 451 (7.3) | 213 (3.9) |
| HIV | 64 (1.0) | 2 (0.04) |
| Hypertension | 1834 (29.5) | 937 (17.0) |
| Hyperlipidemia | 1926 (31.0) | 593 (10.7) |
| Back pain | 757 (12.2) | 554 (10.0) |
| Race/ethnicitya | ||
| White | 4990 (75.1) | – |
| Black | 299 (5.2) | – |
| Other/multiracial | 1287 (19.7) | – |
aRace/ethnicity was recorded by clinic registration staff and was missing 2.1% of the time. Because GHS patients were almost exclusively white, we focused our race/ethnicity analysis on BIDMC patients.
Abbreviations: BIDMC, Beth Israel Deaconess Medical Center; GHS, Geisinger Health System; SD, standard deviation.