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Table 3 Sociodemographic and biomedical factors independentlya associated with very early introduction of solid foods (< 17 weeks) (n = 934)

From: Determinants for early introduction of complementary foods in Australian infants: findings from the HSHK birth cohort study

Variableb Mean age of introduction of solids (weeks) AdjORc CI95 p-value
Sociodemographic factors
 Maternal age (years)
   < 25 19.65 1.00   
  25–29 21.52 0.53 0.28, 0.99 0.048
  30–34 21.87 0.47 0.26, 0.87 0.015
   ≥ 35 22.26 0.28 0.14, 0.58 0.001
Mother’s country of birth
 Australia 20.97 1.00   
 China 22.58 0.39 0.12, 1.32 0.131
 Vietnam 23.44 0.42 0.21, 0.84 0.013
 Asia Other 23.22 0.30 0.12, 0.79 0.014
 Middle-East/ Africa 21.51 0.64 0.29, 1.39 0.261
 Others 20.51 1.07 0.60, 1.93 0.815
Maternal employment status
 Not working at 12 months post-partum 21.77 1.00   
 Returned to work < 6 months post-partum 21.20 1.42 0.87, 1.92 0.160
 Returned to work 6–12 months post-partum 21.83 0.54 0.30, 0.97 0.039
Marital Status
 Married 21.98 1.00   
 Living with a partner/ De facto 21.59 1.19 0.65, 2.18 0.577
 Single Mother 19.12 2.35 1.33, 4.16 0.003
Biomedical factors
 Feeding method at 4 weeks
  Fully breastfed 21.97 1.00   
  Partially breastfed 21.94 0.98 0.51, 1.92 0.970
  Fully formula fed 20.58 2.34 1.49, 3.66 0.000
  1. a Non-significant variables were partner’s country of birth, mother’s occupation, index of relative socioeconomic disadvantage, parity, infant gender, infant birth weight, mother took antibiotics during pregnancy and labour, smoking status of the mother during pregnancy, alcohol status of the mother in pregnancy and postpartum, method of delivery
  2. b All variables in the final model were variables for which, when excluded, the change in deviance compared with the corresponding χ2 test statistic on the relevant degrees of freedom was significant
  3. cAdjOR Adjusted odds ratio, CI95−95% confidence interval