Table 2.
Tumor characteristics by study
| Study quality | Group |
Distance from AV |
|||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| WW |
RS |
LE |
WW | RS | LE | ||||||||||||||||
| T1 | T2 | T3 | T4 | N0 | N+ | T1 | T2 | T3 | T4 | N0 | N+ | T1 | T2 | T3 | T4 | N0 | N+ | ||||
| Beard et al. [22] (2020) | 3 | 10 | 39 | 1 | 29 | 24 | 6 | 7 | 29 | 0 | 9 | 33 | - | - | - | - | - | - | 3.00 | 8.00 | - |
| Dalton et al. [23] (2012) | 0 | 1 | 4 | 1 | 1 | 5 | - | - | - | - | - | - | 5.06 | 5.53 | - | ||||||
| Han et al. [24] (2021) | 0 | 6 | 47 | 5 | 42 | 16 | 0 | 0 | 23 | 3 | 24 | 2 | - | - | - | - | - | - | - | - | - |
| Lai et al. [25] (2016) | 0 | 0 | 15 | 3 | 11 | 7 | 0 | 0 | 25 | 1 | 8 | 18 | - | - | - | - | - | - | 3.35 | 4.81 | |
| Lee et al. [26] (2015) | 0 | 5 | 2 | 1 | 5 | 3 | 0 | 6 | 21 | 1 | 13 | 15 | 0 | 7 | 9 | 0 | 14 | 2 | 4.00 | 4.00 | 2.00 |
| Lee et al. [27] (2021) | 0 | 20 | 24 | 0 | 29 | 15 | 0 | 8 | 23 | 0 | 9 | 22 | - | - | - | - | - | - | - | - | - |
| Li et al. [28] (2015) | 3 | 5 | 15 | 7 | 14 | 16 | 10 | 14 | 48 | 20 | 39 | 53 | - | - | - | - | - | - | 3.50 | 3.70 | - |
| Wang et al. [30] (2021) | 0 | 9 | 68 | 17 | 24 | 70 | 0 | 8 | 71 | 15 | 24 | 70 | - | - | - | - | - | - | 4.00 | 4.00 | - |
| Yeom et al. [31] (2019) | 0 | 3 | 12 | 5 | 10 | 0 | 8 | 121 | 75 | 54 | 0 | 2 | 23 | 0 | 19 | 6 | 4.29 | 4.67 | 3.50 | ||
AV, anal verge; WW, watch and wait; RS, radical surgery; LE, local excision.