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Table 2 Characteristics of large flat polyps for histological subtypes
| Histology (total = 802) | |||||
|---|---|---|---|---|---|
| Variable | SP | LGD | HGD | adenocarcinoma | p value |
| Patients, no. (% of total) | 77 (9.6) | 421 (52.5) | 214 (26.7) | 90 (11.2) | |
| Female, no. (% of group with specific histology) | 29 (37.7) | 171 (40.6) | 86 (40.2) | 35 (38.9) | 0.97 |
| Age, mean ± SD (range), y | 59.4 ± 11 (41–87) | 65.6 ± 10.3 (31–92) | 67 ± 9.6 (38–92) | 65.7 ± 11.6 (41–91) | <0.0001 |
| Polyp size, mean ± SD (range), mm | 25.6 ± 8.4 (20–70) | 31.4 ± 13.8 (20–150) | 38.9 ± 15.9 (20–110) | 42.5 ± 23.3 (20–126) | <0.0001 |
| Location | |||||
| Proximal colon, no. (% of group with specific histology) | 62 (80.5) | 286 (67.9) | 114 (53.3) | 25 (27.8) | <0.0001 |
| Distal colon, no. (% of group with specific histology) | 15 (19.5) | 135 (32.1) | 100 (46.7) | 65 (72.2) | |
