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Table 1 The Characteristics of study samples

From: Placental cord drainage and its outcomes at third stage of labor: a randomized controlled trial

  Drainage group (n = 175) Control group (n = 165) P value
No. (%) No. (%)
Age (Mean, SD) 27.4 ± 4.6 28.3 ± 4.9 0.103a
Education    0.345b
 Primary 79 (45.1) 75 (45.5)  
 Secondary 34 (19.4) 23 (13.9)  
 Higher 62 (35.4) 67(40.6)  
Chronic illness    0.783b
 Yes 32 (18.3) 33 (20.0)  
 No 143 (81.7) 132 (80.0)  
Disease during, pregnancy (e.g. induced hypertension, gestational diabetes)    0.301b
 Yes 18 (10.3) 23 (13.9)  
 No 157 (89.7) 142 (86.1)  
Labor induction    0.167b
 Yes 104 (59.4) 110 (66.7)  
 No 71 (40.6) 55 (33.3)  
Placental size*    0.485c
 Thin (less than 2 cm) 0 (0.0) 1(0.6)  
 Normal (2.0 to 2.5 cm) 175 (100.0) 164 (99.4)  
 Thick (more than 4 cm) 0 (0.0) 0 (0.0)  
Gestational age (week) (Mean, SD) 39.3 ± 0.7 39.6 ± 0.7 0.316a
Gravid (Mean, SD) 1.74 ± 0.9 1.66 ± 0.9 0.335d
Average stay in the maternity hospital (Mean, SD in hour) 6.2 ± 3.1 5.5 ± 3.3 0.192a
Neonates’ weight (Mean, SD in gr) 3063.7 ± 252.2 3184.2 ± 199.6 < 0.001d
  1. *Measured in delivery room and defined as indicated by the American Family Physician [12]
  2. aIndependent samples t-test
  3. bChi-square test
  4. cFisher’s exact test
  5. dMann-Whitney U test