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Table 1 Number (percentage) and univariate odds ratios (95% confidence intervals) for the introduction of solid foods before 17 weeks

From: Predictors of the early introduction of solid foods in infants: results of a cohort study

Variable Solids introduced
<17 weeks
Solids introduced
≥ 17 weeks
OR 95% CI
  N % N %   
Total (n = 519) 226 43.5 293 56.5   
Infant factors       
Sex (n = 519)       
   Male 126 44.4 158 55.6 1.08 0.76, 1.52
   Female 100 42.6 135 57.4 1.00  
Birth weight (g) (n = 513)       
   < 2500 5 41.7 7 58.3 0.70 0.12, 4.23
   2500-4499 284 57.7 208 42.3 0.37 0.09, 1.48
   ≥ 4500 3 33.3 6 66.7 1.00  
Baby admitted to SCN (n = 508)       
   Yes 24 45.3 29 54.7 1.06 0.50, 1.89
   No 199 43.7 256 55.3 1.00  
Maternal factors       
Age (y) (n = 519)       
   <20 18 78.3 5 21.7 6.73 2.42, 18.77
   20-29 125 49.8 126 50.2 1.78 1.24, 2.56
   ≥30 86 35.2 158 64.8 1.00  
Years of education (n = 513)       
   <12 109 50.9 105 49.1 1.61 1.13, 2.03
   ≥12 117 39.1 182 60.9 1.00  
Parity (n = 519)       
   Multiparous 142 42.6 191 57.4 0.90 0.63, 1.30
   Primiparous 85 45.2 102 54.8 1.00  
Marital status (n = 519)       
   Married/defacto 205 42.7 27.5 57.3 0.64 0.33, 1.23
   Single 21 53.8 18 46.2 1.00  
Mother's country of birth (n = 514)       
   Other 14 37.8 23 62.2 0.67 0.34, 1.35
   UK/Ireland 17 35.4 31 64.6 0.61 0.32, 1.13
   Asia 15 30.0 35 70.0 0.47 0.25, 0.90
   Australia/New Zealand 180 47.5 199 52.5 1.00  
Mother's work status (n = 491)       
   Returned to work < 6 mo 54 41.2 77 58.8 1.04 0.68, 1.58
   Returned to work 6-12 mo 40 51.9 37 48.1 1.60 0.97, 2.66
   Not working at 12 mo 114 40.3 169 59.7 1.00  
Mother's infant feeding attitude (n = 519)       
   High IIFASa score 95 34.9 177 65.1 0.48 0.33, 0.68
   Low IIFAS score 131 53.0 116 47.0 1.00  
Mother smoked prior to pregnancy (n = 517)       
   Yes 112 57.1 84 42.9 2.45 1.70, 3.53
   No 113 35.2 208 64.8 1.00  
Feeding method at discharge (n = 519)       
   Formula 23 76.7 7 23.3 4.53 1.90, 10.80
   Combination 34 39.1 53 60.9 0.88 0.55, 1.42
   Fully breastfed 169 42.0 233 58.0 1.00  
Feeding method at 4 weeks (n = 491)       
   Formula 74 62.7 44 37.3 3.47 2.22, 5.44
   Combination 43 47.3 48 52.7 1.85 1.14, 2.99
   Fully breastfed 92 32.6 190 67.4 1.00  
  1. SCN Special Care Nursery
  2. OR = Odds Ratio
  3. 95%CI = 95% confidence interval
  4. IIFAS = Iowa Infant Feeding Attitude Score Range from 17 -- 85 with a high score indicative of positive breastfeeding attitudes. Scores dichotomised to low score below median score for study sample (<65), high score median or above (≥ 65).