| Variable | Gastroenterologists n = 717 | Surgeons n = 1169 | p value |
|---|---|---|---|
| Annual volume, mean ± SD | 79.4 ± 99.8 | 54.5 ± 77.9 | |
| Total no. (%) of colonoscopy procedures | 304 948 (46.3) | 353 165 (53.7) | |
| No. (%) of procedures in rural areas | 37 893 (12.4) | 100 195 (28.4) | < 0.001 |
| Socioeconomic quartile; no (%) of procedures | |||
| 1 | 50 010 (16.4) | 64 145 (18.2) | < 0.001 |
| 2 | 73 181 (24.0) | 129 133 (36.6) | |
| 3 | 81 330 (26.7) | 97 383 (27.6) | |
| 4 | 100 427 (32.9) | 62 504 (17.7) | |
| Distance to hospital, mean ± SD; km | 21.3 ± 52.6 | 27.0 ± 65.5 | < 0.001 |
Note: SD = standard deviation.