Association of XXXX with the development of infantile hypertrophic pyloric stenosis.

@entity10996 @entity1 @entity3465
BACKGROUND: @entity10996 ( @entity10996 ) has several known risk factors. The association between @entity3465 and @entity10996 and the timeline of presentation are poorly defined. Our aim was to evaluate the associations between @entity10996 and @entity3465 . METHODS: We performed a retrospective cohort study of 1,074,236 @entity1 born between June 2001 and April 2012 in the US Military Health System. @entity10996 cases and gestational ages (GA) were identified using billing codes. Additional risk factors for @entity10996 were controlled for in a multivariable logistic regression model. RESULTS: The incidence of @entity10996 was 2.99 per 1,000 in preterm @entity1 and 2.25 per 1,000 in full term (relative risk (RR) = 1.33, 95% confidence interval (CI) 1.16-1.54). The adjusted odds ratio for @entity3465 was 1.26 (95% CI 1.08-1.46). The median (interquartile range (IQR)) chronological age at presentation was 40 d (30-56) in preterm @entity1 vs. 33 d (26-45) in full term (P < 0.001). Median postmenstrual age at presentation was 42   wk in preterm @entity1 (40-42) vs. 45   wk (44-46) in full term (P < 0.001). CONCLUSION: Prematurity is associated with @entity10996 . Premature @entity1 develop @entity10996 at a later chronological age, but earlier postmenstrual age, than term @entity1 . Providers should have an increased concern for @entity10996 development in premature @entity1 .
