Table 2.
No. of studies | No. of patients | Pooled HR (95% CI) | Heterogeneity | ||||
---|---|---|---|---|---|---|---|
Fixed | Random | I2(%) | P-value | ||||
Overall survival(OS) | 11 | 684 | 2.52 (1.87-3.38) | 2.54 (1.72-3.76) | 32.2 | 0.142 | |
Cancer type | |||||||
Digestive system | 4 | 313 | 2.55 (1.70-3.82) | 2.79 (1.67-4.68) | 23 | 0.273 | |
Non-digestive system | 7 | 371 | 2.48 (1.62-3.81) | 2.17 (1.18-3.99) | 44.7 | 0.093 | |
HR estimation method | |||||||
Indirectly | 8 | 438 | 2.00 (1.39-2.86) | 2.00 (1.38-2.88) | 1.5 | 0.418 | |
Directly | 3 | 246 | 4.06(2.42-6.79) | 3.96 (2.15-7.28) | 27.3 | 0.253 | |
Sample size | |||||||
≥50 | 6 | 522 | 2.75 (1.95-3.87) | 2.94 (1.69-5.09) | 51.7 | 0.066 | |
<50 | 5 | 162 | 1.97 (1.11-3.51) | 1.97 (1.11-3.51) | 0 | 0.484 | |
Follow-up time(month) | |||||||
≥60 | 8 | 483 | 2.25 (1.62-3.13) | 2.17 (1.36-3.47) | 38.2 | 0.125 | |
<60 | 3 | 201 | 3.91 (2.03-7.53) | 3.91 (2.03-7.53) | 0 | 0.529 | |
Tumor Tissue origins | |||||||
Mesenchymal tissue | 1 | 27 | 0.75 (0.16-3.48) | 0.75 (0.16-3.48) | – | – | |
Epithelial tissue | 10 | 657 | 2.64 (1.95-3.56) | 2.72 (1.86-3.96) | 26.6 | 0.199 | |
DiseaseFree Survival (DFS) | 2 | 158 | 7.19 (3.20-16.17) | 7.19 (3.20-16.17) | 0 | 0.812 |