Table 1.
The Main Characteristics of the Included Studies.
| Author | Year of Publication | Country | Time | Patients | Sample Size | Male | Mean of Age (range) | Stage | Surgery Treatment | Chemotherapy | Radiotherapy | Median Follow-Up Month (Range) |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Bendardaf R | 2008 | Finland | 1996-2003 | CRC | 73 | 46 | 57.9 (NR) | II-IV | Partial | All | No patient | 32.6 (NR) |
| Cawkwell L | 1999 | UK | NR | CRC | 101 | NR | >50 (NR) | NR | NR | NR | NR | 60.0 (NR) |
| Huh JW | 2016 | Korea | NR | Rectal cancer | 209 | 136 | 56 (27-81) | II, III | All | All | All | 44 (2-87) |
| Ide T | 2008 | Japan | 1999-2005 | CRC | 94 | 60 | 68.2 (40-87) | I-IV | All | All | NR | 26.1 (NR) |
| Jansson A | 2003 | Sweden | 1972-1996 | CRC | 301 | NR | 70 (34-94) | I-IV | All | NR | NR | NR (NR) |
| Jensen LH | 2007 | Denmark | NR | CRC | 28 | 13 | 61 (49-74) | III-IV | NR | All | NR | 12.2 (6.7-20.2) |
| Jensen SA | 2009 | Denmark | 1996-2003 | CRC | 340 | 159 | NR (NR) | II-IV | NR | All | NR | 6.1 (4.1-11.3) |
| Langner E | 2010 | Poland | NR | CRC | 75 | 45 | NR (NR) | I-IV | All | NR | NR | NR (NR) |
| Lanza G | 2006 | Italy | 1986-1995 | CRC | 718 | 359 | 65 (27-85) | II, III | Partial | Most | Partial | 90.5 (63-144) |
| Ma J | 2015 | China | 2008-2011 | Colon cancer | 184 | 111 | NR (NR) | NR | NR | All | NR | 17.6 (7-36) |
| Park JW | 2010 | Korea | 2001-2003 | CRC | 318 | 191 | 60.5 (27-87) | I-IV | All | Partial | NR | 24.0 (NR) |
| Pu C | 2015 | China | 2005-2008 | CRC | 327 | 201 | NR (NR) | I-IV | NR | Partial | NR | 24.0 (NR) |
| Rau B | 2003 | Germany | 1993-1999 | CRC | 66 | 41 | 59 (39-74) | NR | NR | All | All | 39.3 (11.3-83.4) |
| Russo A | 2009 | Italy | NR | CRC | 526 | 288 | 48 (20-88) | I-IV | NR | NR | NR | 64 (6-383) |
| Sinicrope FA | 2006 | USA | NR | Colon cancer | 528 | 274 | NR (NR) | II, III | NR | All | NR | NR (NR) |
| Smyth EF | 2004 | UK | 1995-1998 | Colon cancer | 111 | NR | 72 (3990) | I-IV | All | NR | NR | NR (NR) |
| Sun Z | 2014 | China | 2009-2012 | CRC | 404 | 233 | NR (NR) | I-IV | NR | NR | NR | >36 (NR) |
| Wang H | 2014 | China | 2005-2008 | CRC | 327 | 201 | 58.7 (2581) | I-IV | NR | NR | NR | 60.0 (NR) |
| Wang JB | 2016 | China | 2011-2012 | Colon cancer | 90 | 58 | NR (NR) | II, III | All | Partial | NR | 27 (5-35) |
| Wang Y | 2014 | China | NR | CRC | 433 | 254 | 58.6 (2482) | I-IV | All | Partial | Partial | 52 (1-87) |
| Wu HW | 2013 | China | 2004-2006 | CRC | 87 | 56 | 59 (35-82) | I-III | All | NR | NR | 60.0 (NR) |
Abbreviations: CRC, colorectal cancer; NR, not report.