. Author manuscript; available in PMC: 2012 Jan 1.

Published in final edited form as: Heart Rhythm. 2010 Sep 29;8(1):23–28. doi: 10.1016/j.hrthm.2010.09.073

Table 4. Univariate Analysis of Predictors of Complications.

Predictor (Denominator)	Complications: N (%)	p-value

Congenital Heart Disease		0.12
Yes (310)	28 (9)
No (773)	104 (13)

Age		0.57
≤ 5 years (80)	--^*
>5 years (1,003)	124 (12)

Hospital Implant Volume		0.7
<5 implants/year (382)	45 (12)
5-9 implants/year (373)	51 (14)
≥10 implants/year (329)	35 (11)

Hospital Type
Not Children's Hospital (157)	31 (20)
Children's Unit in General Hospital (447)	44 (10)	0.05^†
Children's Hospital (441)	52 (12)	0.12^†

Cells based on ten or fewer observations were suppressed due to the HCUP data use agreement.

^†

Compared to Not Children's Hospital