Table 4. Secondary Outcomes.

	iNO N= 59	Control N= 65	P	RR (95% CI)
Mechanical Ventilation - no. (%)	13 (22)	15 (23)	0.89	0.97 (0.62-1.52)
Total Ventilation Days. – M±SD	9.7 (29)	8.4 (12)	0.27	-
Necrotizing Enterocolitis – no. (%)	5 (9)	10 (16)	0.23	0.54 (0.20-1.49)
Symptomatic PDA – no. (%)
Medical treatment	1 (2)	2 (3)	1	0.55 (0.1,5.5)
Surgical ligation	3 (2)	8 (12)	0.21	0.41 (0.1,1.5)
Threshold ROP* – no. (%)	3 (5)	4 (6)	1	0.83 (0.2,3.5)
Severe ICH**	2 (3.4)	4 (6.2)	0.68	0.78 (0.13-4.47)
Sepsis – no. (%)	13 (22)	14 (22)	0.98	1.01 (0.52-1.96)
Days in Hospital – M±SD	75 (32)	75 (29)	0.72	-

Mean ± SD or no. (%)

^*Threshold ROP defined as requiring interventional therapy.

^**Intracranial hemorrhage grade 3-4