. Author manuscript; available in PMC: 2015 Jun 18.

Published in final edited form as: Pediatrics. 2013 Apr 22;131(5):e1502–e1508. doi: 10.1542/peds.2012-3435

TABLE 3.

Stratified Cox Proportional HRs for 1-Year Mortality in Infants Born With CCHDs: Atlana, Georgia, 1979–2005

Variable	Referent Group	HR^a	95% CI	P
Born 1979–1993	Born 1994–2005	2.65	2.11–3.32	<.001
Diagnosed at >1 day old	Diagnosed at ≤1 day old	0.54	0.42–0.69	<.001
Maternal age ≥30 years	Maternal age <30 years	0.77	0.62–0.97	.02
Birth weight <2500 g	Birth weight ≥2500 g	1.73	1.34–2.24	<.001

Infants with noncardiac defects and chromosomal syndromes were excluded.

Each HR was adjusted for the other variables in the table. The model was stratified on neighborhood poverty status because it violated the proportional hazards assumption.