Ali Channa et al. (12) | 0 | 27 | 1 | — | 15 | — | — | Incomplete data |
Chattopadhyay et al. (13) | 0 | 0 | 3 | 12 | 20 | 18 | 16.7 ± 4.2 | Benign and malignant polyps |
Damore et al. (4) | 0 | 1 | 0 | — | 6 | — | — | Incomplete data |
Khan et al. (15) | 0 | 0 | 4 | — | — | — | — | Incomplete data |
Mainprize et al. (16) | 0 | 0 | 2 | — | — | — | — | Incomplete data |
Park et al. (17) | 0 | 1 | 24 | 8 | 30 | 15 | 15.2 ± 5.6 | Malignant polyps only |
Xu et al. (19) | — | — | — | 3 | 12 | — | — | Incomplete data |
Zielinski et al. (20) | 2 (< 6) | 3 (6–9) | 8 ( ≥ 10) | 4 | 53 | 18 | 18.5 ± 15.4 | Benign and malignant polys |
Akyurek et al. (11) | 1 (< 6) | 1 (6–10) | 8 | — | — | — | — | Incomplete data |
Sarkut et al. (18) | 0 | 1 | 21 | — | — | — | — | Incomplete data |
Huang et al. (14) | — | Benign | — | — | — | — | 10.8 ± 4.7 | Incomplete data |
— | Malignant | — | — | — | — | 13.5 ± 4.2 | Incomplete data |