Table 3. Details of pancreatic extracorporeal shock wave lithotripsy (P- ESWL).

	Pediatric group (n = 72)	Control group (n = 1063)	P value
Mean age ± SD at performance of ESWL, years	15.2 ± 2.2	44.7 ± 12.5	< 0.001
Mean time ± SD from onset of chronic pancreatitis to ESWL, years	5.3 ± 4.3	7.8 ± 7.6	< 0.001
Median time (range) from identification of stone(s) to ESWL, years	0.19 (0.0 – 10.0)	0.5 (0.0 – 23.2)	0.02
Mean number of shocks ± SD	8265 ± 4918	11231 ± 7247	< 0.001
Median number of ESWL sessions (range)	1.0 (1.0 – 5.0)	2.0 (1.0 – 12.0)	< 0.001

SD, standard deviation.