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. 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