TABLE 2

Univariate and Multivariate Analysis of Baseline Characteristics for Time to PDA Closure

Predictor VariableUnivariate AnalysisMultivariate Cox Proportional Hazards Regression
Unadjusted HR (95% CI)Unadjusted HR, PAdjusted HR (95% CI)Adjusted HR, P
Platelet count (expressed as multiples of 10 000 per μL1.051 (1.027–1.076)<.0011.045 (1.019–1.07)<.001
Indication for platelet counta0.561(0.34–0.94).030.61 (0.21–1.8).4
Maternal PIH0.48 (0.28–0.81).0060.457 (0.16–1.34).2
Birth weight1.00 (1.00–1.0).031.001 (1.0–1.002).09
Apgar score at 1 minute1.17 (0.63–2.18).6
Cord pH0.92 (0.01–153.47).9
pPROM2.28 (0.9–5.76).08
Gestational age1.03 (0.91–1.17).6
Maternal chronic hypertension0.640 (0.2–2.05).4
Male sexb1.18 (0.72–1.95).5
Mode of deliveryc
 Elective LSCS0.55 (0.07–4.1).6
 Emergency LSCS0.62 (0.37–1.04).07
  • N = 70. El, ; Em, ; LSCS, lower segment cesarean section (delivery); pPROM, preterm premature rupture of membranes.

  • a Maternal PIH was compared with “others” as the reference group.

  • b Female was the reference group.

  • c Vaginal delivery was the reference group.