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Table 1 Characteristics of the 10 selected studies included in the meta-analysis

From: Outcome of rectal cancer surgery in obese and nonobese patients: a meta-analysis

Study Year Country Study size Group (OB/NOB) NOS Matching
Bokey et al. [12] 2014 Australia 255 95/160 8 1, 2, 4, 5
Smith et al. [13] 2014 USA 11,995 3050/8945 6 4, 5
Denost et al. [14] 2013 France 490 47/443 7 1, 3, 4, 5
Aytac et al. [15] 2013 USA 471 157/314 9 1–5
Clark et al. [16] 2013 USA 96 39/57 6 2, 4
Oyasiji et al. [8] 2012 USA 26 7/19 7 1, 3, 4,
Karahasanoglu et al. [17] 2011 Turkey 100 14/86 7 1, 2, 4, 5
Ballian et al. [4] 2010 USA 254 68/186 9 1–5
Chern et al. [18] 2010 USA 592 159/433 8 1, 2, 4, 5
Bege et al. [7] 2009 France 210 24/186 6 1, 2, 4, 5
  1. NOS Newcastle-Ottawa scale, OB obese, NOB nonobese
  2. 1 = age; 2 = gender; 3 = American Society of Anesthesiologists score; 4 = diagnosis; 5 = surgical procedures