Table 1.
Basic characteristics of the included studies
| Study | Year | Country | Type | Patients | Age mean ± SD/median (range) | BMI mean ± SD/median (range) | Pathological stagea | T stagea | N stagea | Mean tumor size mean ± SD/median (range) | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Lap/open | Lap | Open | Lap | Open | Lap | Open | Lap | Open | Lap | Open | Lap | Open | ||||||||||
| I/II III/IV | I/II III/IV | T0/1/2 | 3/4 | T0/1/2 | 3/4 | N0 1/2 | N0 1/2 | |||||||||||||||
| Laurent [24] | 2012 | Italy | RCNT | 110/65 | 64 (22–82) | 64 (30–86) | 24.4 (17–33) | 25.3 (16–35) | 76 | 34 | 48 | 17 | 16 | 94 | 9 | 56 | 49 | 61 | 33 | 32 | NR | |
| Yamamoto [25] | 2011 | Japan | RCNT | 22/22 | 55 (34–68) | 58 (35–69) | 21.8 (16.8–26.7) | 22.5 (19.3–28.9) | 18 | 4 | 19 | 3 | NR | NR | 2.2 (1.5–3.8) | 2.8 (1.1–5.5) | ||||||
| Park [26] | 2011 | Korea | RCNT | 130/80 | 60.9 ± 11.7 | 59.1 ± 11.4 | 23.4 ± 3.2 | 23.3 ± 2.6 | 76 | 54 | 44 | 36 | 53 | 77 | 46 | 34 | NR | 4.0 ± 1.9 | 4.3 ± 1.8 | |||
| Chi [18] | 2015 | China | RCNT | 89/48 | 56.8 ± 12.0 | 55.3 ± 14.9 | 22.2 ± 4.2 | 27.6 ± 6.5 | 36 | 53 | 16 | 32 | 46 | 43 | 26 | 22 | 63 | 26 | 26 | 22 | 3.4 ± 1.1 | 3.1 ± 1.4 |
| Fujimoto [28] | 2010 | Japan | RCNT | 35/19 | 61 (33–82) | 58 (28–67) | NR | NR | 19 | 14 | 14 | 5 | 22 | 13 | 8 | 11 | 18 | 17 | 10 | 9 | 2.7 (1.0–9.0) | 3.5 (1.2–7.0) |
aUICC classification
SD standard deviation, BMI body mass index, RCNT retrospective comparative non-randomized trial, LAP laparoscopic surgery, Open open surgery