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Distribution of polyp diagnosis by age groups
| Age | Neoplastic | Hyperplastic | Mixed or others | Total |
|---|---|---|---|---|
| ≤50 | 572(76.9) | 136(18.3) | 36(4.8) | 744(100) |
| 51–60 | 1030(78.8) | 192(14.7) | 85(6.5) | 1307(100) |
| 61–70 | 1261(86.3) | 134(9.2) | 67(4.6) | 1462(100) |
| 71≤ | 1316(90.0) | 71(4.9) | 75(5.1) | 1462(100) |
| Total | 4179(84.0) | 533(10.7) | 263(5.3) | 4975(100) |
