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Table 2 Statistical analysis results

From: Clinical efficacy of radical nephrectomy versus nephron-sparing surgery on localized renal cell carcinoma

Subgroup of tumor size Sample size No. of studies Meta-analysis Test of heterogeneity Egger's test
Case Control OR (95% CI) Pvalue Pvalue I2(%) Pvalue
Cancer-specific death
Overall 6,275 2,457 5 [6],[16],[19],[20],[23] 1.58 (1.15 to 2.15) 0.004 0.22 30.0 0.27
≤4.0 cm 3,930 1,191 4 [6],[16],[19],[23] 1.86 (1.11 to 3.13) 0.002 0.17 41
>4.0 cm 2,345 1,266 1 [20] 1.36 (1.01 to 1.85) 0.04
Tumor recurrence
Overall 3,701 1,857 5 [15],[16],[18]-[20] 0.84 (0.67 to 1.06) 0.14 0.43 0.0 0.58
≤4.0 cm 1,290 558 3 [15],[16],[19] 0.67 (0.27 to 1.64) 0.38 0.16 45
>4.0 cm 2,411 1,299 2 [18],[20] 0.87 (0.36 to 2.11) 0.76 0.68 0
Complications
Overall 826 682 6 [15],[17]-[19],[21],[22] 0.91 (0.51 to 1.63) 0.74 <0.01 71.0 0.76
≤4.0 cm 488 477 3 [15],[19],[21] 1.10 (0.31 to 3.92) 0.88 0.0004 87
>4.0 cm 265 191 2 [17],[18] 0.71 (0.44 to 1.13) 0.15 0.88 0