Variable Variable HR (95% CI) P value
LIT LIT 0.68 (0.55 – 0.83) <0.001
CL < 25mm CL < 25mm 1.59 (1.08 – 2.33) 0.018
Chorioamnion separation Chorioamnion separation 1.38 (1.01 - 1.89) 0.042
GA at FLS (weeks) < 18 Ref.
18 – 24 2.38 (1.80 - 3.16) <0.001
> 24 11.46 (7.67 - 17.13) <0.001
LIT: long-term indomethacin therapy, CL: cervical length, GA: gestational age, FLS: fetal laser surgery HR: hazard ratio, CI: confidence interval LIT: long-term indomethacin therapy, CL: cervical length, GA: gestational age, FLS: fetal laser surgery HR: hazard ratio, CI: confidence interval LIT: long-term indomethacin therapy, CL: cervical length, GA: gestational age, FLS: fetal laser surgery HR: hazard ratio, CI: confidence interval LIT: long-term indomethacin therapy, CL: cervical length, GA: gestational age, FLS: fetal laser surgery HR: hazard ratio, CI: confidence interval