Evaluation of three stone-scoring systems for predicting SFR and complications after percutaneous nephrolithotomy: a systematic review and meta-analysis

Table 2 Overall analysis of demographic and clinical characteristics compared stone-free with not stone-free after PCNL

Outcomes of interest	No. of studies	No. of patients SF/NSF	OR/WMD(95% CI) ^a	p-value	Study heterogeneity
Outcomes of interest	No. of studies	No. of patients SF/NSF	OR/WMD(95% CI) ^a	p-value	Chi2	df	I²	p-value
Age(year)	7	1101/559	0.02[−1.48,1.52] ^a	0.98	5.57	6	0%	0.47
BMI(kg/m²)	6	1053/534	−0.59[− 1.80,0.63] ^a	0.34	21.87	5	77%	0.0006
Proportion/male	6	914/484	1.48[1.18,1.86]	0.0007	2.38	5	0%	0.80
Laterality(right/left)	6	914/484	1.10[0.88,1.38]	0.41	8.43	5	41%	0.13
Stone burden(mm2)	6	914/484	−504.28[−673.88,-334.67] ^a	< 0.0001	13.47	5	63%	0.02
No of involved calyces	3	560/316	−1.23[−1.94,-0.52]	0.0007	9.15	2	78%	0.01
Staghorn	6	914/484	0.33[0.26,0.43]	< 0.0001	6.58	5	24%	0.25
Stone density(HU)	4	777/377	−37.65[−81.95,6.65] ^a	0.10	4.90	4	18%	0.30
Guy score	5	777/377	−0.64[−0.90,-0.37] ^a	< 0.0001	26.42	4	85%	< 0.0001
CROES nomogram	6	964/452	29.48[9.84,49.12] ^a	0.003	57.50	5	91%	< 0.0001
S.T.O.N.E. score	6	964/452	−1.23[−1.78,-0.67] ^a	< 0.0001	35.04	5	86%	< 0.0001

SF stone free, NSF not stone free, PCNL percutaneous nephrolithotomy, OR odds ratio, WMD weighted mean difference, CI confidence interval, BMI body mass index, ^a WMD

ISSN: 1471-2490