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Table 1 Association between sociodemographic 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

Variable Solids introduceda Solids introduceda Univariate odds ratiob
< 17 weeks ≥17 weeks
N (%) N (%) OR CI95
Maternal age (years)
  < 25 30 (32.6) 62 (67.4) 1.00  
 25–29 36 (14.1) 219 (85.9) 0.34*** 0.19, 0.60
 30–34 44 (12.5) 307 (87.5) 0.30*** 0.17, 0.51
  ≥ 35 17 (7.2) 219 (92.8) 0.16*** 0.08, 0.31
Maternal education
  < Year 12 33 (23.4) 108 (76.6) 1.00  
 Year 12 completed 36 (17.3) 172 (82.7) 0.69 0.40, 1.16
 College/TAFE 23 (12.9) 155 (87.1) 0.49* 0.27, 0.87
 University 35 (8.6) 372 (91.4) 0.31*** 0.18, 0.52
Marital Status
 Married 79 (10.8) 655 (89.2) 1.00  
 Living with a partner/ De facto 18 (16.4) 92 (83.6) 1.62 0.93, 2.83
 Single Mother 30 (33.3) 60 (66.7) 4.15*** 2.52, 6.81
Mother’s country of birth
 Australia 77 (17.7) 359 (82.3) 1.00  
 China 3 (5.4) 53 (94.6) 0.26* 0.80, 0.87
 Vietnam 12 (9.1) 120 (90.9) 0.47* 0.25, 0.89
 Asia Other 6 (5.5) 104 (94.5) 0.27** 0.11, 0.64
 Middle-East/ Africa 9 (11.1) 72 (88.9) 0.58 0.28, 1.22
 Others 20 (16.9) 98 (83.1) 0.95 0.55, 1.63
Partner’s country of birth
 Australia 59 (16.4) 300 (83.6) 1.00  
 China 2 (4.8) 40 (95.2) 0.25 0.06, 1.08
 Vietnam 8 (7.0) 107 (93.0) 0.38* 0.18, 0.82
 Asia Other 7 (6.7) 98 (93.3) 0.36* 0.16, 0.82
 Middle-East/ Africa 12 (12.5) 84 (87.5) 0.73 0.37, 1.41
 Others 12 (10.0) 108 (90.0) 0.57 0.29, 1.09
Mother’s occupation
 Home duties/ student 32 (18.8) 138 (81.2) 1.00  
 Unskilled 22 (13.0) 147 (87.0) 0.65 0.36, 1.17
 Sales/Clerical 43 (14.7) 250 (85.3) 0.74 0.45, 1.23
 Managers 9 (14.8) 52 (85.2) 0.75 0.33, 1.67
 Professionals 21 (8.7) 220 (91.3) 0.41** 0.23, 0.74
Mother’s employment status
 Not working at 12 months 71 (14.5) 420 (85.5) 1.00  
 Return to work < 6 months 33 (17.6) 155 (82.4) 1.26 0.80, 1.98
 Return to work 6–12 months 18 (8.1) 203 (91.9) 0.53 0.31, 0.90
Index for Relative Socioeconomic Disadvantage
 Least Disadvantaged 6 (12.0) 44 (88.0) 1.00  
 2nd Quintile 36 (15.1) 202 (84.9) 1.31 0.52, 3.29
 3rd Quintile 7 (8.8) 73 (91.3) 0.70 0.22, 2.23
 4th Quintile 19 (10.4) 164 (89.6) 0.85 0.32, 2.25
 Most Disadvantaged 59 (15.4) 324 (84.6) 1.34 0.55, 3.28
  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 < 0.05 ** p < 0.01 *** p < 0.001