Table 2 The demographics of the studies
Variable | No. of studies with available data | WMD/OR | 95% CI | p value |
|---|---|---|---|---|
Male (n) | 13 | 1.03 | (0.8, 1.32) | 0.83 |
BMI (kg/m2) | 9 | − 0.09 | (− 0.41, 0.23) | 0.58 |
Age (years) | 13 | 0.01 | (− 0.69, 0.7) | 0.99 |
Tumor laterality (L/R) | 11 | 0.94 | (0.72, 1.22) | 0.63 |
Tumor size (cm) | 11 | − 0.15 | (− 0.31, 0.01) | 0.07 |
ASA score | 3 | 0.09 | (− 0.03, 0.22) | 0.14 |
Baseline creatinine (umol/L) | 5 | 0.72 | (− 0.35, 1.79) | 0.19 |