. 2019 Jul 1;19:57. doi: 10.1186/s12894-019-0488-y

Table 5.

Overall analysis of three scoring systems for predicting complications after PCNL

Outcome of interest	No. of studies	No.of patients Non-complicated/complicated	OR/WMD(95%CI) ^a	p-value	Study heterogeneity
Outcome of interest	No. of studies	No.of patients Non-complicated/complicated	OR/WMD(95%CI) ^a	p-value	Chi²	df	I ²	p-value
Guy score	2	263/95	−0.29[− 0.57,-0.02]	0.03	2.02	1	51%	0.15
CROES nomogram	2	263/95	1.97[−3.77,7.71]	0.50	0.00	1	0%	0.96
S.T.O.N.E. score	2	263/95	−0.27[−0.59,0.05]	0.10	0.20	1	0%	0.66

PCNL percutaneous nephrolithotomy, CROES clinical research office of the endourological society scoring system, Guy Guy scoring system, S.T.O.N.E S.T.O.N.E scoring system, OR odds ratio, WMD weighted mean difference, CI confidence interval, ^a OR