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. 2010 Mar 13;468(6):1635–1648. doi: 10.1007/s11999-010-1285-9

Table 4.

Results of subgroup meta-analysis

Outcome Number of studies Number WMD/OR Tests for HG
(sample size) of patients (95% CI) (p value) (p value, I2)
Studies with score of 10 or greater
 Operative time 5 697 12.52 (6.29, 18.74), < 0.0001 < 0.00001, 88%
 Complications 6 747 1.31 (0.67, 1.2.57), 0.43 0.35, 11%
Studies with MMV approach
 Operative time 5 318 18.95 (7.36, 30.55), 0.001 < 0.00001,94%
 Complications 6 398 1.17 (0.51, 2.67), 0.71 0.34, 11%
Studies with a followup of at least 12 months
 Complications 5 747 1.73 (0.89, 3.36), 0.11 0.64, 0%

HG = heterogeneity; WMD = weighted mean difference; OR = odds ratio; CI = confidence interval; MMV = mini-midvastus.