Table 1.

Comparison of Cases and Process Measures Between Urologist- and Gastroenterologist-Directed ESWL

Variable	Urologist-directed	Gastroenterologist-directed	P value
Number of pts (rate)	18 (0.47/mo)	61 (1.79/mo)
Mean patient age, y (SD)	58.6 (13.5)	57.6 (13.1)	.77
Female sex, n (%)	8 (44)	25 (41)	.79
Prior intervention, % of pts	89	80	.40
Charlson Index (SD)	2.61 (1.82)	3.26 (2.82)	.36
Opiate use, % of pts	78	46	.017
Mean number of pancreatic stones (SD)	1.78 (1)	1.75 (0.94)	.91
Mean diameter of largest stone, mm (SD)	9.4 (4.29)	11.6 (6.20)	.22
Time from referral to ESWL, d (SD)	41.3 (28.4)	49.0 (35.2)	.40
Mean shocks/session (SD)	3117 (567)	4341 (663)	< .001
Same day ESWL and ERCP, % of pts	5.6	65.6	< .001
Post-procedure hospitalization, % of pts	100	14.8	< .001
Captured adverse events, % of pts	16.7	21.7	.65

ERCP, endoscopic retrograde cholangiopancreatography; ESWL, extracorporeal shock wave lithotripsy; pts, patients; SD, standard deviation.