Table 2.

Outcome parameters of included studies.

Reference	Subgroup	Stone-free rate (%)	Operation time (minutes)	Length of stay (day)	Complication rate (%)
Dash et al. (19)	Normal-weight	84%	ND	ND	36%
	Morbidly obese	67%	ND	ND	14%
Natalin et al. (25)	Normal-weight	91%	70.37 (30–170)	ND	ND
	Overweight	97%	88.78 (30–159)	ND	ND
	Obese	94%	78.23 (30–156)	ND	ND
Best and Nakada (16)	Non-obese	67%	ND	ND	ND
	Obese	82%	ND	ND	ND
Delorme et al. (20)	Non-obese	85%	ND	ND	12%
	Obese	85%	ND	ND	12%
Drăgutescu et al. (23)	Normal-weight	95%	ND	ND	4.5%
	Obese	91%	ND	ND	6.8%
Caskurlu et al. (17)	Normal-weight	79%	49.0 ± 14.6	1.7 ± 1.6	16.0%
	Overweight	77.9%	49.2 ± 14.8	1.8 ± 1.8	15.6%
	Obese	75.5%	52.0 ± 10.3	1.6 ± 1.7	14.3%
Chew et al. (18)	Normal-weight	66%	ND	ND	13%
	Overweight	75%	ND	ND	9%
	Obese	70%	ND	ND	6%
Pompeo et al. (26)	Normal-weight	82.9%	77.5 ± 42.8	ND	ND
	Obese	80%	66.2 ± 35.1	ND	ND
	Morbidly obese	90.9%	85.2 ± 23.4	ND	ND
Sari et al. (27)	Normal-weight	60.8%	ND	1.08 ± 1.06	16.5%
	Overweight	61.7%	ND	0.95 ± 0.51	16.5%
	Obese	73.6%	ND	1.03 ± 0.77	16.3%
	Morbidly obese	61.5%	ND	1.075 ± 0.61	15.4%
Alkan et al. (15)	Normal-weight	81%	60 ± 24	1.08 ± 0.75	16%
	Overweight	87%	67 ± 31	1.04 ± 0.29	13%
	Obese	87.4%	62 ± 29	1 ± 0.375	12%
	Morbidly obese	85%	71 ± 37	1 ± 0.33	15%
Doizi et al. (21)	Normal-weight	67.4%	89.8 ± 42.4	ND	2.6%
	Obese	68%	72.94 ± 42.1	ND	2.1%
	Morbidly obese	71.4%	77.3 ± 43.6	ND	14.3%
Doluoglu et al. (22)	Normal-weight	75.9%	45.5 (10–100)	1 (1–1)	0%
	Overweight	89.8%	50 (30–120)	1 (1–2)	6.1%
	Obese	85.7%	45.5 (25–95)	1 (1–2)	7.1%
Krambeck et al. (24)	Underweight	89.2%	ND	ND	5.6%
	Normal-weight	88.1%	ND	ND	5.0%
	Overweight	87.4%	ND	ND	5.2%
	Obese	83.1%	ND	ND	5.3%
	Super obese	73%	ND	ND	4.9%

ND, not documented.