Table 4

Incidence of patent ductus arteriosus

Conventional Trigger Odds ratio (95% CI)
Total population 19393
 Indomethacin only25141.90 (0.91–4.09)
 Ligation842.04 (0.53–9.42)
 Indomethacin +/− ligation (%)33  (17)18  (9)2.01 (1.05–3.93)
Survivors 185178
 Indomethacin only25131.98 (0.94–4.37)
 Ligation741.71 (0.43–8.10)
 Indomethacin +/− ligation (%)32 (17)17 (10)1.98 (1.02–3.96)