Table 2.
Heterogeneity
| |||||||
---|---|---|---|---|---|---|---|
Clinicopathologic features | No of studies | No of patients | Pooled OR (95% CI) | PHet | I2 (%) | P-value | Model used |
| |||||||
Gender | 10 | 743 | 0.94 (0.69, 1.27) | 0.963 | 0.0 | 0.677 | Fixed |
Age | 12 | 1,237 | 0.84 (0.67, 1.06) | 0.943 | 0.0 | 0.141 | Fixed |
Tumor size | 11 | 788 | 1.99 (1.49, 2.65) | 0.139 | 32.5 | ,0.001 | Fixed |
Differentiation | 4 | 331 | 3.02 (1.90, 4.81) | 0.005 | 77.8 | ,0.001 | Random |
Lymph node metastasis | 9 | 919 | 2.69 (1.91, 3.79) | 0.072 | 44.5 | ,0.001 | Fixed |
TNM stage | 13 | 1,268 | 0.31 (0.24, 0.40) | 0.118 | 33.1 | ,0.001 | Fixed |
Abbreviations: Fixed, fixed-effects model; NOS, Newcastle–Ottawa Scale; PHet, probability of heterogeneity; Random, random-effects model.