Comparison of the incidence of pulmonary branch stenosis (PBS) in indomethacin treated compared with spontaneous closed patent ductus arteriosus (PDA)
| PDA closed with indomethacin (n=22) | PDA closed spontaneously (n=29) | p Value | |
| Gestational age (weeks) | 28 (25–30) | 30 (24–31) | 0.0001 |
| Birth weight (g) | 942 (670–1320) | 1255 (700–1870) | 0.0002 |
| Incidence of PBS (%) | 69 (11/16)3-150 | 52 (13/52)3-151 | 0.13 |