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Table 1 Sociodemographic and biomedical characteristics of the participants (n = 935)

From: Determinants of breastfeeding initiation among mothers in Sydney, Australia: findings from a birth cohort study

Characteristic Number Percent
Sociodemographic factors
 Maternal age (years)
   < 25 93 9.9
  25–29 255 27.3
  30–34 351 37.5
   ≥ 35 236 25.2
 Maternal education
   < Year 12 141 15.1
  Year 12 completed 208 22.2
  College/TAFE 179 19.1
  University 407 43.5
 Marital status
  Married 734 78.5
  Living with a partner/ De facto 110 11.8
  Single Mother 91 9.7
 Mother’s occupation
  Home duties/ student 170 18.2
  Managers 61 6.5
  Professionals 241 25.8
  Sales/Clerical 294 31.4
  Unskilled 169 18.1
 Mother’s country of birth
  Australia 436 46.6
  China 57 6.1
  Vietnam 132 14.1
  Asia other 111 11.9
  Middle East/Africa 81 8.7
  Others 117 12.5
 Partner’s country of birth
  Australia 359 38.4
  China 42 4.5
  Vietnam 115 12.3
  Asia Other 105 11.2
  Middle East/Africa 96 10.3
  Others 120 12.8
 Index for relative socioeconomic disadvantage
  Least Disadvantaged 50 5.3
  2nd Quintile 238 25.5
  3rd Quintile 80 8.6
  4th Quintile 183 19.6
  Most Disadvantaged 384 41.1
Biomedical factors   
 Parity
  Primiparous 468 50.1
  Multiparous 467 49.9
 Infant gender
  Female 458 49.0
  Male 477 51.0
 Infant birth weight
  Average or greater 889 95.1
  Low 46 4.9
 Smoking status of the mother post partum
  No 852 91.1
  Yes 83 8.9
 Smoking status of the mother during pregnancy
  No 884 94.5
  Yes 51 5.5
 Alcohol drinking status of the mother post partum
  No 633 67.7
  Yes 302 32.3
 Alcohol drinking status of the mother during pregnancy
  No 843 90.2
  Yes 92 9.8
 Method of delivery
  Vaginal 653 69.8
  Caesarean 282 30.2