Table 1. Colonoscopy quality metrics by patient characteristics, NHCR 2009 – 2014 1 .
| Total | ≥ 1 adenoma | No. of adenomas | ≥ 1 CSSP | |
| Participants characteristics | N (Col %) | N (Row %) | Mean (SD) | N (Row %) |
| Total | 25,324 | 5,862 (23.2) | 1,244 (5.0) | |
| Age at colonoscopy (years) | P < 0.0001 | P < 0.0001 | P = 0.02 | |
| 50 – 54 | 11,036 (43.6) | 2,312 (21.0) | 1.49 (1.0) | 540 (4.9) |
| 55 – 59 | 4,465 (17.6) | 1,050 (23.5) | 1.56 (1.1) | 245 (5.5) |
| 60 – 64 | 4,268 (16.8) | 1,044 (24.5) | 1.63 (1.2) | 204 (4.8) |
| 65 – 69 | 3,014 (11.9) | 778 (25.8) | 1.61 (1.1) | 163 (5.5) |
| 70 – 74 | 1,461 (5.9) | 401 (26.9) | 1.84 (1.3) | 56 (3.8) |
| ≥ 75 | 1,050 (4.2) | 277 (26.4) | 1.73 (1.4) | 36 (3.5) |
| Year of colonoscopy | P < 0.0001 | P < 0.0001 | P < 0.0001 | |
| 2009 | 1,825 (7.2) | 385 (21.1) | 1.45 (1.0) | 67 (3.7) |
| 2010 | 3,481 (13.7) | 790 (22.7) | 1.50 (1.0) | 152 (4.4) |
| 2011 | 4,822 (19.0) | 992 (20.6) | 1.54 (1.0) | 198 (4.1) |
| 2012 | 6,820 (26.9) | 1,533 (22.5) | 1.57 (1.1) | 314 (4.7) |
| 2013 | 6,538 (25.8) | 1,615 (24.7) | 1.61 (1.2) | 349 (5.4) |
| 2014 | 1,838 (7.3) | 547 (29.8) | 1.80 (1.2) | 164 (9.1) |
| Gender | P < 0.0001 | P < 0.0001 | P = 0.001 | |
| Female | 14,364 (56.7) | 2,614 (18.2) | 1.43 (0.9) | 652 (4.6) |
| Male | 10,960 (43.3) | 3,248 (29.6) | 1.70 (1.2) | 592 (5.5) |
| Race | P = 0.77 | P = 0.24 | P = 0.40 | |
| White | 23,390 (95.8) | 5,414 (23.2) | 1.57 (1.1) | 1,153 (5.0) |
| Non-white | 1,032 (4.2) | 243 (23.6) | 1.65 (1.2) | 45 (4.4) |
| Education | P < 0.0001 | P = 0.17 | P = 0.02 | |
| Some college/college | 18,886 (77.7) | 4,274 (22.6) | 1.56 (1.1) | 893 (4.8) |
| ≤ High school | 5,418 (22.3) | 1,373 (25.3) | 1.61 (1.1) | 296 (5.5) |
| Family history of CRC (first degree) | P = 0.29 | P = 0.28 | P = 0.79 | |
| No | 19,924 (79.9) | 4,571 (23.4) | 1.59 (1.1) | 961 (5.0) |
| Yes | 4,909 (20.1) | 1,114 (22.7) | 1.55 (1.0) | 247 (5.1) |
| BMI (kg/m 2 ) | P < 0.0001 | P < 0.0001 | P < 0.0001 | |
| Underweight/Normal < 25 | 7,093 (29.3) | 1,338 (18.9) | 1.45 (0.9) | 277 (3.9) |
| Overweight 25 to < 30 | 9,035 (37.3) | 2,118 (23.4) | 1.54 (1.0) | 464 (5.2) |
| Obese 30 to < 35 | 5,096 (21.0) | 1,359 (26.7) | 1.67 (1.2) | 290 (5.8) |
| Obese (Class II + III) ≥ 35 | 2,994 (12.4) | 792 (26.5) | 1.69 (1.2) | 161 (5.4) |
| Smoking Status | P < 0.0001 | P < 0.0001 | P < 0.0001 | |
| Never | 13,067 (53.5) | 2,764 (21.2) | 1.51 (1.0) | 556 (4.3) |
| Former | 9,321 (38.2) | 2,227 (23.9) | 1.61 (1.1) | 450 (4.9) |
| Current | 2,024 (8.3) | 683 (33.8) | 1.70 (1.2) | 199 (10.0) |
NCHR, New Hampshire Colonoscopy Registry; CSSP, clinically significant serrated polyp; BMI, body mass index; CRC, colorectal cancer
1
Missing (N): race (902); education (1,020); family history of CRC (891); BMI (1,106); smoker (912); CSSP (234)