Table 1 Demographic of the included trials
Study | Country | Multi-center | Duration | Group | Number | Age (year) | Sex (male/female) | Tumor level (cm) | Tumor stage | Preoperative radiotherapy | Jaded score |
|---|---|---|---|---|---|---|---|---|---|---|---|
Marti et al. [40] | Switzerland | No | 1999 to 2004 | CJP | 63 | 68.6 (30.9, 85.5) | 38/25 | 6 (1, 11) | NR | 4 | 6 |
SEA | 95 | 67.2 (32.3, 88.9) | 62/33 | 7 (1, 15) | NR | 3 | |||||
Parc et al. [41] | International | Yes | 2007 to 2009 | CJP | 80 | 60.2 (9.7) | 59/21 | 3 (0, 4) | NR | 42 | 5 |
SEA | 87 | 59.6 (10.6) | 52/35 | 2 (0, 4) | NR | 50 | |||||
Rasulov et al. [39] | Russia | No | Oct. 2015 to Nov. 2017 | CJP | 22 | 57 (30, 68) | 6/16 | 7 (5–10) | NR | 11 | 4 |
SEA | 30 | 60 (28, 71) | 18/12 | 7 (5–10) | NR | 14 | |||||
Okkabaz et al. [38] | Turkey | No | Jun. 2009 to NR | CJP | 29 | 58.9 (13.7) | 18/11 | 7.9 (3.8) | NR | NR | 6 |
SEA | 28 | 59.1 (11.9) | 19/9 | 6.2 (3.8) | NR | NR | |||||
Marković et al. [37] | Serbia | No | Jan. 2000 to Dec. 2004 | CJP | 40 | 55.25 (34, 78) | 17/23 | (2, 4) | 2/19/19/0 | 0 | 4 |
SEA | 40 | 56.4 (35, 79) | 10/30 | (2, 4) | 0/23/17/0 | 0 | |||||
Doeksen et al. [36] | Netherlands | Yes | Apr. 2002 to Jan. 2007 | CJP | 55 | 66 (33, 82) | 36/19 | NR | 22/14/19/0 | 55 | 6 |
SEA | 52 | 66 (44, 79) | 37/15 | NR | 12/13/15/2 | 52 | |||||
Akira et al. [35] | Japan | No | 1999 to 2004 | CJP | 19 | 60 (45, 79) | 11/8 | NR | 11/5/3/0 | 0 | 3 |
SEA | 17 | 62 (29, 89) | 11/6 | NR | 6/5/6/0 | 0 | |||||
Jiang et al. [34] | Taiwan, China | No | Jan. 1998 to Dec. 1999 | CJP | 24 | 62.3 (3.3) | 12/12 | 7.9 (1.5) | 3/10/10/1 | 12 | 5 |
SEA | 24 | 64.9 (2.8) | 15/9 | 8.6 (0.3) | 7/8/6/3 | 10 | |||||
Machado et al. [33] | Sweden | No | Oct. 1995 to Apr. 1999 | CJP | 36 | 65 (38, 83) | 18/18 | 10 (3–15) | 9/13/12/0 | 29 | 4 |
SEA | 35 | 66 (50, 87) | 21/14 | 10 (4–15) | 9/15/10/0 | 28 | |||||
Machado et al. [32] | Sweden | No | Oct. 1995 to Apr. 1999 | CJP | 50 | 67 (38, 83) | 27/23 | 10 (3–15) | 10/17/21/0 | 39 | 4 |
SEA | 50 | 66.5 (40–87) | 32/18 | 10 (4–15) | 14/19/16/0 | 39 | |||||
Huber et al. [31] | Germany | No | Oct. 1995 to Oct. 1996 | CJP | 29 | 62.3 | 13/16 | 5.2 (2.5, 9) | NR | NR | 4 |
SEA | 30 | 61.9 | 12/18 | 5.8 (3, 9) | NR | NR |