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Comparison of the outcome of PDA ligation with and without previous prostaglandin synthetase inhibitor
| Parameter | PDA ligation without previous PSI (n = 17) | PDA ligation after PSI (n = 65) | p value |
| Total days in oxygen Median (95% CI) | 83 (48–142) days | 102 (78–126) days | 0.20* |
| Incidence of CLD | 13 (76%) | 50 (77%) | 1.00¥ |
| Deaths | 2 (12%) | 15 (23%) | 0.50¥ |
* Mann Whitney U test
¥Fisher exact test
