Variables | No. of studies | No. of patients | Effects model | OR (95% CI) | p | Heterogeneity | |
---|---|---|---|---|---|---|---|
I2(%) | Ph | ||||||
Histological grade (G3 vs G1-G2) | 3 | 627 | Fixed | 1.76 (1.18–2.62) | 0.006 | 0 | 0.980 |
FIGO stage (III-IV vs I-II) | 2 | 505 | Fixed | 2.52 (1.54–4.11) | < 0.001 | 45.5 | 0.175 |
Tumor size (≥ 4 cm vs < 4 cm) | 2 | 820 | Fixed | 1.50 (1.12–2.01) | 0.007 | 0 | 0.721 |
Lymph node metastasis (presence vs absence) | 2 | 820 | Random | 0.98 (0.18–5.27) | 0.984 | 93.2 | < 0.001 |