| Variable | Missing | level | total | DMC (N = 444) | Kings county (N = 1134) | SBUMC (N = 647) | P-value1 |
| Adenoma | 0 | Yes | 494 (22.20%) | 132 (29.73%) | 194 (17.11%) | 168 (25.97%) | <0.0001 |
| No | 1731 (77.80%) | 312 (70.27%) | 940 (82.89%) | 479 (74.03%) | |||
| Advanced adenoma | 0 | Yes | 98 (4.40%) | 15 (3.38%) | 42 (3.70%) | 41 (6.34%) | 0.0168 |
| No | 2127 (95.60%) | 429 (96.62%) | 1092 (96.30%) | 606 (93.66%) | |||
| Right colon adenoma | 0 | Yes | 316 (14.20%) | 77 (17.34%) | 142 (12.52%) | 97 (14.99%) | 0.0378 |
| No | 1909 (85.80%) | 367 (82.66%) | 992 (87.48%) | 550 (85.01%) | |||
| Age (continuous) | 0 | 444 vs 1134 vs 647 | 57.00 ± 10.73 | 58.00 ± 12.00 | 57.63 ± 10.73 | 55.00 ± 10.00 | <0.0001 |
| Age (categorical) | 0 | 45 - 54 | 879 (39.51%) | 144 (32.43%) | 438 (38.62%) | 297 (45.90%) | <0.0001 |
| 55 - 64 | 919 (41.30%) | 187 (42.12%) | 490 (43.21%) | 242 (37.40%) | |||
| ≥ 65 | 427 (19.19%) | 113 (25.45%) | 206 (18.17%) | 108 (16.69%) | |||
| BMI (continuous) | 34 | 413 vs 1131 vs 647 | 28.27 ± 7.29 | 28.30 ± 7.80 | 28.60 ± 7.30 | 27.48 ± 6.44 | 0.0002 |
| BMI (categorical) | 33 | Obese (BMI ≥ 30) | 829 (37.82%) | 166 (40.10%) | 460 (40.67%) | 203 (31.38%) | 0.0015 |
| Overweight (BMI ≥ 25, <30) | 844 (38.50%) | 147 (35.51%) | 430 (38.02%) | 267 (41.27%) | |||
| Underweight + Healthy (BMI < 25) | 519 (23.68%) | 101 (24.40%) | 241 (21.31%) | 177 (27.36%) | |||
| Gender | 0 | Female | 1437 (64.58%) | 276 (62.16%) | 772 (68.08%) | 389 (60.12%) | 0.0016 |
| Male | 788 (35.42%) | 168 (37.84%) | 362 (31.92%) | 258 (39.88%) | |||
| Insurance | 0 | Private | 759 (34.11%) | 129 (29.05%) | 195 (17.20%) | 435 (67.23%) | <0.0001 |
| Medicare | 236 (10.61%) | 95 (21.40%) | 57 (5.03%) | 84 (12.98%) | |||
| Medicaid | 695 (31.24%) | 187 (42.12%) | 404 (35.63%) | 104 (16.07%) | |||
| Self-Pay | 535 (24.04%) | 33 (7.43%) | 478 (42.15%) | 24 (3.71%) | |||
| Race | 0 | African-American | 1117 (50.20%) | 175 (39.41%) | 900 (79.37%) | 42 (6.49%) | <0.0001 |
| Afro-Caribbean | 378 (16.99%) | 216 (48.65%) | 160 (14.11%) | 2 (0.31%) | |||
| American Indian or Alaskan Native | 2 (0.09%) | 0 (0.00%) | 1 (0.09%) | 1 (0.15%) | |||
| Asian | 43 (1.93%) | 6 (1.35%) | 9 (0.79%) | 28 (4.33%) | |||
| Other | 119 (5.35%) | 13 (2.93%) | 59 (5.20%) | 47 (7.26%) | |||
| White | 566 (25.44%) | 34 (7.66%) | 5 (0.44%) | 527 (81.45%) | |||
| Race combined | 0 | White | 566 (25.44%) | 34 (7.66%) | 5 (0.44%) | 527 (81.45%) | <0.0001 |
| Black | 1495 (67.19%) | 391 (88.06%) | 1060 (93.47%) | 44 (6.80%) | |||
| Other | 164 (7.37%) | 19 (4.28%) | 69 (6.08%) | 76 (11.75%) | |||
| Ethnicity | 0 | Hispanic | 134 (6.02%) | 33 (7.43%) | 46 (4.06%) | 55 (8.50%) | 0.0003 |
| Non-Hispanic | 2091 (93.98%) | 411 (92.57%) | 1088 (95.94%) | 592 (91.50%) | |||
| Type of Attending | 0 | Consultant | 1058 (47.55%) | 25 (5.63%) | 976 (86.07%) | 57 (8.81%) | <0.0001 |
| Teaching | 1167 (52.45%) | 419 (94.37%) | 158 (13.93%) | 590 (91.19%) |