Table 2.

Frequency of different complications given as percentages (total numbers in parentheses) separately for adults and children

Type of Complication	All Patients (%) (9288)	Adults (%) (8573)	Children (%) (715)	P Value
Gross hematuria	1.9 (178)	1.9 (167)	1.5 (11)	0.44
Blood transfusion	0.9 (79)	0.9 (78)	0.1 (1)	0.03a
Surgery/arterial embolization	0.2 (18)	0.2 (17)	0.1 (1)	0.73
Complicationsb	2.6 (215)	2.7 (233)	1.8 (13)	0.15
Major complicationsc	0.9 (88)	1.0 (86)	0.3 (2)	0.06

^aSignificant difference between adults and children.

^bComplications were gross hematuria, blood transfusions, and/or surgery/arterial embolization.

^cMajor complications were blood transfusions and/or surgery/arterial embolization.