. Author manuscript; available in PMC: 2018 Aug 1.

Published in final edited form as: J Pediatr. 2017 Apr 7;187:119–126.e1. doi: 10.1016/j.jpeds.2017.03.021

Table 4.

online: Relationship between the predictor variables (Surgical ligation and presence of a moderate-to-large PDA on day 7) and the morbidity outcomes (BPD and BPD or death before 36 weeks)

	Death (%)		BPD (%) ^§		BPD or Death (%)
	Yes	No	Yes	No	Yes	No
Ligation (%)	12	11	54	26	58	33
(n=349) ^¶	NS		<0.005		<0.005
PDA at 7d (%)	15	10	45	22	52	28
(n=349) ^¶	NS		<0.005		<0.005

^¶

, 48 infants died before the echocardiogram on day 7

^§

, 81 infants died before 36⁺⁶ weeks without evidence of BPD; therefore n=316 NS, p-value >0.05