Meta-Analysis
Copyright ©The Author(s) 2020.
World J Gastrointest Oncol. Jun 15, 2020; 12(6): 687-698
Published online Jun 15, 2020. doi: 10.4251/wjgo.v12.i6.687
Table 2 Meta-analysis and subgroup analyses
AnalysisnRef.Random-effects model
Fixed-effects model
Heterogeneity
HR (95%CI)P valueHR (95%CI)P valueI2Ph
Esophageal cancer OS16[5,7-11,13,16-24]1.107 (1.014-1.208)0.0231.089 (1.036-1.145)0.001a48.80%0.015
DFS3[17,21,23]1.300 (0.883-1.913)0.1841.263 (0.976-1.633)0.07548.40%0.144
Subgroup 1: Study design16[5,7-11,13,16-24]1.107 (1.014-1.208)0.1961.089 (1.036-1.145)0.1960.000.865
Prospective9[5,8,16-18,20-22,24]1.073 (0.964-1.194)0.0641.073 (0.964-1.194)0.002a76.30%0.000
Retrospective7[7,9-11,13,19,23]1.150 (0.992-1.332)0.023a1.094 (1.034-1.158)0.001a48.80%0.015
Subgroup 2: Samplesize16[5,7-11,13,16-24]1.107 (1.014-1.208)0.023a1.089 (1.036-1.145)0.001a48.80%0.015
< 2005[16,19,21-23]1.294 (0.946-1.771)0.1071.254 (0.985-1.597)0.06734.70%0.190
≥ 20011[5,7-11,13,17,18,20,24]1.089 (0.995-1.190)0.0631.082 (1.028-1.139)0.002a54.20%0.016
Subgroup 3: Ethnicity16[5,7-11,13,16-24]1.107 (1.014-1.208)0.0641.107 (1.014-1.208)0.06448.80%0.015
Caucasian12[5,7-9,11,13,16-19,21,24]1.091 (0.995-1.197)0.1501.091 (0.995-1.197)0.15049.30%0.027
Asian4[10,20,22,23]1.251 (0.922-1.696)0.023a1.251 (0.922-1.696)0.023a57.60%0.069
Subgroup 4: HR type16[5,7-11,13,16-24]1.107 (1.014-1.208)0.023a1.089 (1.036-1.145)0.001a48.80%0.015
Univariate13[5,8,10,13,16-24]1.053 (0.952-1.166)0.3141.029 (0.949-1.115)0.49223.20%0.209
Multivariate3[7,9,11]1.194 (1.010-1.411)0.037a1.130 (1.059-1.204)0.000a81.00%0.005
Squamous cell carcinoma OS6[10,13,16,20,22,23]1.096 (0.896-1.341)0.3711.009 (0.908-1.120)0.87457.20%0.039
Adenocarcinoma OS2[9,21]1.360 (1.111-1.664)0.003a1.385 (1.186-1.616)0.000a22.00%0.257