Results:
Eighteen infants (75%) responded and six (25%) did not respond to 				the treatment. Three neonates died in the responding group, while all the 				non-responders died (P = 0.0001). The survival rate was 62.5% among all 				neonates. NO significantly decreased OI (P < 0.0001) and improved 				the arterial/alveolar (a/A) oxygen ratio (P < 0.0001) within the 				first 2 h of NO therapy in 61.1% of the responders. However, the OI and the a/A 				oxygen ratio remained almost the same throughout the treatment in the 				non-responders and the non-survivors.