Table 2.
Surveillance colonoscopy findings according to index body mass index.
| Total (n = 2,904) | Index BMI (kg/m2) | p for trend | |||
|---|---|---|---|---|---|
| <25 (n = 1,769, 60.9%) | 25–29 (n = 1,040, 35.8%) | ≥30 (n = 95, 3.3%) | |||
| Incidence, n (%) | |||||
| Any CRAs | 1,559 (53.7) | 920 (52.0) | 577 (55.5) | 62 (65.3) | 0.014* |
| LRA | 987 (36.4) | 606 (36.7) | 347 (35.7) | 34 (38.6) | 0.789* |
| HRA | 381 (14.0) | 197 (11.9) | 163 (16.8) | 21 (23.9) | <0.001* |
| Any AA | 191 (6.6) | 117 (6.6) | 67 (6.4) | 7 (7.4) | 0.936* |
| ≥3 NAA | 468 (16.1) | 242 (13.7) | 201 (19.3) | 25 (26.3) | <0.001* |
| ≥3 any CRAs | 514 (17.7) | 273 (15.4) | 215 (20.7) | 26 (27.4) | <0.001* |
| ≥4 any CRAs | 316 (10.9) | 165 (9.3) | 135 (13.0) | 16 (16.8) | <0.001* |
| ≥5 any CRAs | 207 (7.1) | 103 (5.8) | 92 (8.8) | 12 (12.6) | <0.001* |
| Number, mean ± SD | |||||
| Any CRAs | 1.4 ± 2.1 | 1.3 ± 2.1 | 1.5 ± 2.2 | 1.8 ± 2.1 | 0.001** |
| NAA | 1.3 ± 2.0 | 1.2 ± 2.0 | 1.4 ± 2.1 | 1.7 ± 2.0 | 0.001** |
| AA | 0.1 ± 0.3 | 0.1 ± 0.3 | 0.1 ± 0.3 | 0.1 ± 0.3 | 0.977** |
| Location, n (%) | |||||
| Any CRAs | 0.487* | ||||
| Right colon | 715 (41.0) | 442 (61.8) | 250 (35.0) | 23 (3.2) | |
| Left colon | 463 (26.6) | 271 (58.5) | 172 (37.1) | 20 (4.3) | |
| Both | 565 (32.4) | 325 (57.5) | 215 (38.1) | 25 (4.4) | |
| NAA | 0.750* | ||||
| Right colon | 688 (41.6) | 421 (61.2) | 242 (35.2) | 25 (3.6) | |
| Left colon | 503 (30.4) | 293 (58.3) | 188 (37.4) | 22 (4.4) | |
| Both | 461 (27.9) | 266 (57.7) | 175 (38.0) | 20 (4.3) | |
| AA | 0.637* | ||||
| Right colon | 325 (75.2) | 211 (64.9) | 101 (31.1) | 13 (4.0) | |
| Left colon | 95 (22.0) | 59 (62.1) | 33 (34.7) | 3 (3.2) | |
| Both | 12 (2.8) | 6 (50.0) | 6 (50.0) | 0 | |
| CRC incidence, n (%) | 37 (1.3) | 27 (1.5) | 10 (1.0) | 0 | 0.231* |
| Follow-up period (years), mean ± SD | 3.0 ± 1.1 | 2.9 ± 1.1 | 3.0 ± 1.1 | 2.9 ± 1.0 | 0.102† |
| Frequency of surveillance colonoscopy, mean ± SD | 1.3 ± 0.5 | 1.2 ± 0.5 | 1.3 ± 0.5 | 1.3 ± 0.6 | 0.238† |
BMI, body mass index; CRA, colorectal adenoma; LRA, low risk adenoma; HRA, high risk adenoma; AA, advanced adenoma; NAA, non-advanced adenoma; SD, standard deviation; CRC, colorectal cancer. *Values by Cochran-Armitage trend for categorical variables. **Values by linear regression. †Values by One-way ANOVA analyses of variances for continuous variables among groups.