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Table 3 Characteristics of mothers, babies and deliveries and the proportion of first breastfeed within 30 minutes and within 120 minutes

From: Initiation of breastfeeding within 120 minutes after birth is associated with breastfeeding at four months among Japanese women: A self-administered questionnaire survey

Characteristics n Within 30 minutes (%) More than 30 minutes p value Within 120 Minutes (%) More than 120 minutes p value
Total 318 115(36.2) 203(63.8)   181(56.9) 137(43.1)  
Mother's age (years)        
   18–24 43 12(27.9) 31(72.1) 0.590a 24(55.8) 19(44.2) 0.994a
   25–29 123 44(35.8) 79(64.2)   70(56.9) 53(43.1)  
   30–34 106 40(37.7) 66(62.3)   60(56.6) 46(43.4)  
   35–41 46 19(41.3) 27(58.7)   27(58.7) 19(41.3)  
Baby's gender        
   Male 155 58(37.4) 97(62.6) 0.649a 90(58.1) 65(41.9) 0.687a
   Female 163 57(35.0) 106(65.0)   91(55.8) 72(44.2)  
Parity        
   First 146 51(34.9) 95(65.1) 0.439b 82(56.1) 64(43.8) 0.985b
   Second 138 50(36.2) 88(53.8)   80(58.0) 58(42.0)  
   Third or more 34 14(41.2) 20(58.8)   19(55.9) 15(44.1)  
Gestational age (weeks)        
   36 or less 21 3(14.3) 18(85.7) 0.031a 4(19.1) 17(80.9) <0.001a
   37 or more 297 112(37.7) 185(62.3)   177(59.6) 120(40.4)  
Method of delivery        
   Non-caesarean section 263 113(43.0) 150(57.0) <0.001a 176(66.9) 87(33.1) <0.001a
   Caesarean section 55 2(3.6) 53(96.4)   5(9.0) 50(91.0)  
Bleeding at delivery        
   Less than 500 ml 213 92(43.2) 121(56.8) <0.001c 138(64.8) 75(35.2) <0.001c
   500 ml or more 85 15(17.6) 70(82.4)   31 (36.5) 54(63.5)  
   Unknown 20 8(40.0) 12(60.0)   12(60.0) 8(40.0)  
Early skin-to-skin contact        
   Contact 64 32(50.0) 32(50.0) 0.005c 45(70.3) 19(29.7) 0.010c
   No contact 245 76(31.0) 169(69.0)   128(51.0) 117(47.8)  
   Unknown 9 7(77.8) 2(22.2)   8(88.9) 1(11.1)  
Supplementation (sugar water or formula)        
   Supplemented 116 25(21.6) 91(78.4) <0.001c 46(39.7) 70(60.3) <0.001c
   Non supplemented 133 77(57.9) 56(42.1)   107(80.5) 26(19.5)  
   Unknown 69 13(18.8) 56(81.2)   28(40.6) 41(59.4)  
  1. a Chi-square test; b Cochran-Armitage test; c chi-square test excluding unknown