Meta-Analysis
Copyright ©2013 Baishideng Publishing Group Co.
World J Gastroenterol. Jul 28, 2013; 19(28): 4596-4606
Published online Jul 28, 2013. doi: 10.3748/wjg.v19.i28.4596
Table 2 Summary statistics of pooled data comparing normal body mass index vs high body mass index for overall patients, patients receiving open gastrectomy and laparoscopic gastrectomy
Outcome variablesStudiesPooled patientsPooled RR or MD or HR95%CITest for overall effect
Test for heterogeneity
ZP valueI2P value
Overall patients
Operative time95905-29.14-38.08, -20.216.39< 0.0000170%  0.0008
Retrieved lymph nodes64612  1.69  0.75, 2.623.55  0.00049%  0.36
Blood loss52096-194.58-314.21, -74.953.19  0.00186%< 0.00001
Morbidity1717514  0.75  0.66, 0.854.48< 0.0000158%  0.001
Anastomotic leak1912367  0.59  0.42, 0.823.07  0.00234%  0.07
Pancreatic fistula82959  0.46  0.34, 0.634.90< 0.0000116%  0.3
Mortality1316590  0.86  0.58, 1.290.71  0.480%  0.76
Postoperative hospital stay64552-5.83-13.44, 1.781.5  0.1998%< 0.00001
Cancer-specific survival512321  1.14  1.07, 1.204.21< 0.000185%< 0.0001
Patients receiving open gastrectomy
Operative time72179-25.24-33.53, -16.955.97< 0.0000153%  0.05
Retrieved lymph nodes62838  3.81-0.34, 7.961.8  0.0791%< 0.00001
Blood loss51708-212.93-301.04, -124.824.74< 0.0000174%  0.004
Morbidity1112510  0.78  0.66, 0.942.68  0.00764%  0.002
Anastomotic leak147320  0.58  0.38, 0.892.51  0.0137%  0.08
Pancreatic fistula62470  0.46  0.38, 0.674.03< 0.000137%  0.16
Mortality1012763  1.17  0.69, 2.010.58  0.560%  0.83
Postoperative hospital stay41339-2.04-6.00, 1.911.01  0.3180%  0.002
Cancer-specific survival412180  1.14  1.07, 1.204.23< 0.000189%< 0.00001
Patients receiving laparoscopic gastrectomy
Operative time41845-15.06-17.41, -12.7012.52< 0.000010%  0.52
Retrieved lymph nodes31746  2.11  1.35, 2.885.39< 0.000010%  0.61
Blood loss3360-47.83-68.12,-27.534.62< 0.0000147%  0.15
Morbidity63151  0.48  0.29, 0.792.91  0.00467%  0.009
Anastomotic leak63194  0.83  0.42, 1.650.53  0.632%  0.2
Pancreatic fistula3489  0.3  0.08, 1.201.7  0.0910%  0.33
Mortality31833  0.4  0.12, 1.301.53  0.130%  0.41
Postoperative hospital stay31833  0.17-0.80, 1.150.35  0.7334%  0.22
Cancer-specific survival1141  1.65  0.13, 20.700.39  0.7Not applicableNot applicable