Table 1 The main characteristics of the included studies
Author | Year of publication | Country | Time | Sample size | Males | Mean of age (range) | Patients | Stage (UICC) | Differentiation | Surgery | Chemo−/Radio-therapy | Follow-up time (median, months) |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
Zhu J | 2015 | China | 2003–2009 | 115 | 70 | 62 (29, 89) | CRC | All | All | All | NR/NR | NR |
Chun HK | 2014 | Korea | 2006–2007 | 201 | 132 | 58.6 | Rectal cancer | III | All | All | Partial/Partial | 57.8 |
Langenskiöld M | 2013 | Sweden | 1999–2003 | 136 | 78 | 75 (44, 91) | CRC | I-III | All | All | Partial/No | 51.0 |
Uhlmann ME | 2012 | Germany | 1998–2001 | 103 | 67 | 66.7 | CRC | All | NR | All | NR/NR | 104.5 |
Lampropoulos P | 2012 | Greece | 2005–2006 | 195 | 103 | 68.6 (36, 90) | CRC | All | NR | All | No/No | 56.0 |
Li X | 2011 | China | 2003–2004 | 147 | 86 | NR (24, 87) | Colon cancer | All (Duke’s stage) | NR | All | Partial/No | ≥ 60.0 |
Khanh do T | 2011 | Japan | 1998–2005 | 206 | 114 | 63.3 (19, 92) | CRC | All | All | All | Partial/NR | ≥ 60.0 |
Wincewicz A | 2010 | Poland | 2004–2008 | 72 | 35 | NR | CRC | All | Moderate and poor | All | NR/NR | NR |
Gulubova M | 2010 | Bulgaria | 1997–2006 | 142 | 92 | 65 b (39, 96) | CRC | All | All | All | NR/NR | 37.6 |
Bellone G | 2010 | Italy | 2004–2008 | 75 | 47 | NR (24, 87) | Colon cancera | All (Duke’s stage) | NR | All | NR/NR | 44.0 |
Tsamandas AC | 2004 | Greece | 1990–1998 | 124 | 79 | 66 b (25, 82) | CRC | All | All | All | Partial/Partial | 68.0 |
Robson H | 1996 | UK | NR | 72 | 47 | 70 (32, 92) | CRC | All | All | All | NR/NR | ≥ 36.0 |
Friedman E | 1995 | US | 1994 | 34 | 18 | 64.6 | CRC | NR | NR | All | NR/NR | 57.3 (mean) |