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Table 2 The SWL outcome (case %) in the three groups and comparisons (Chi square p values) among the study groups

From: Has the pelvic renal stone position inside the upper loop of JJ stent any influence on the extracorporeal shock wave lithotripsy results?

SWL outcome	Case %				p values
SWL outcome	A	B	C	All	A versus B	A versus C	B versus C	A versus B + C	C versus A + B
SF after 1st SWL	4.5	2.9	11.9	8.0	0.819	0.300	0.243	0.503	0.110
SF after 2nd SWL	4.5	14.7	25.0	17.3	0.247	0.009	0.329	0.017	0.013
SF after 3rd SWL	13.7	23.5	15.5	16.7	0.406	0.987	0.441	0.693	0.833
Overall stone free	22.7	41.1	52.4	42.0	0.133	0.002	0.368	0.004	0.263
Residual fragments	36.4	32.4	27.4	30.9	0.897	0.397	0.752	0.463	0.409
Stone not fragmented	40.9	26.5	20.2	27.1	0.276	0.022	0.621	0.028	0.040

Values in italics for p < 0.05
Group A stone-inside-loop, Group B loop-crossing-stone, Group C stone-outside-loop, All the whole study group, SF stone-free

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