Minimally Invasive Percutaneous Nephrolithotomy versus Retrograde Intrarenal Surgery for Upper Urinary Stones: A Systematic Review and Meta-Analysis

Table 5

Sensitivity analysis results.

Items	Studies	Sample size	Tests for heterogeneity		Analysis model	Test for overall effect	RR/WMD 95% CI		Favors
		Mini-PCNL/RIRS		value			value
Stone-free rate	[11, 12, 16, 20, 22]	215/214	51%	0.09	Fixed	2.52	0.01	1.92 [1.16, 3.18]	Mini-PCNL
Operative time	[11, 12, 16, 20, 22]	215/214	94%	<0.00001	Random	1.06	0.29	7.60 [−5.32, 20.53]	RIRS
Hemoglobin drop	[11, 20]	88/86	0	0.60	Random	1.55	0.12	0.21 [−0.06, 0.47]	RIRS
Hospital stay	[11, 12, 22]	121/118	94%	<0.00001	Random	1.99	0.05	1.34 [0.02, 2.67]	RIRS
Total complication	[11, 12, 16, 20]	185/185	84%	0.00003	Random	0.44	0.66	1.38 [0.33, 5.84]	RIRS
Grade I	[11, 12, 16, 20]	185/185	78%	0.04	Random	0.44	0.66	1.35 [0.35, 5.15]	RIRS
Grade II	[11, 12, 16, 20]	185/185	0	0.65	Random	0.46	0.64	1.22 [0.52, 2.86]	RIRS
Grade III	[12, 20]	109/109	35%	0.21	Random	0.94	0.35	3.36 [0.27, 41.48]	RIRS

Mini-PCNL: minimally invasive percutaneous nephrolithotomy; RIRS: retrograde intrarenal surgery; RR: relative risk; WMD: weighted mean difference; CI: confidence interval.