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Table 2 Association between biomedical factors and 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

VariablesSolids introducedaSolids introducedaUnivariate odds ratiob
< 17 weeks≥17 weeks
N (%)N (%)ORCI95
Parity
 Primiparous61 (13.1)406 (86.9)1.00 
 Multiparous66 (14.1)401 (85.9)1.090.75, 1.59
Infant gender
 Female59 (12.9)398 (87.1)1.00 
 Male68 (14.3)409 (85.7)1.120.77, 1.63
Infant birth weight
  ≥ 2500 g121 (13.6)767 (86.4)1.00 
  < 2500 g6 (13.040 (87.0)0.950.39, 2.29
Gestational age
  ≥ 37 weeks120 (13.9)746 (86.1)1.00 
  < 37 weeks7 (10.3)61 (89.7)0.710.32, 1.60
Method of delivery
 Vaginal94 (14.4)558 (85.6)1.00 
 Caesarean33 (11.7)249 (88.3)0.790.52, 1.20
Breastfeeding initiation
 No23 (30.7)52 (69.3)1.00 
 Yes104 (12.1)755 (87.9)0.31***0.18, 0.53
Feeding method at 4 weeks
 Fully breastfed62 (10.6)524 (89.4)1.00 
 Partially breastfed13 (9.0)131 (91.0)0.840.45, 1.57
 Fully formula fed52 (25.5)152 (74.5)2.89***1.92, 4.36
Smoking status of the mother postpartum
 No100 (11.8)751 (88.2)1.00 
 Yes27 (32.5)56 (67.5)3.62***2.19, 6.00
Smoking status of the mother during pregnancy
 No108 (12.2)775 (87.8)1.00 
 Yes19 (37.3)32 (62.7)4.26***2.33,7.78
Alcohol drinking status of the mother postpartum
 No78 (12.3)554 (87.7)1.00 
 Yes49 (16.2)253 (83.8)1.380.93, 2.03
Alcohol drinking status of the mother during pregnancy
 No111 (13.2)731 (86.8)1.00 
 Yes16 (17.4)76 (82.6)1.390.78, 2.46
  1. a The total of the categories do not always add up to 934 due to missing or incomplete data for some items
  2. b The univariate odds ratio indicates the likelihood of early introduction of solid foods
  3. OR odds ratio; CI95–95% confidence interval
  4. *** p < 0.001