# Table 2 Association between biomedical factors and very early introduction of solid foods (< 17 weeks) (n = 934)

Variables Solids introduceda Solids introduceda Univariate odds ratiob
< 17 weeks ≥17 weeks
N (%) N (%) OR CI95
Parity
Primiparous 61 (13.1) 406 (86.9) 1.00
Multiparous 66 (14.1) 401 (85.9) 1.09 0.75, 1.59
Infant gender
Female 59 (12.9) 398 (87.1) 1.00
Male 68 (14.3) 409 (85.7) 1.12 0.77, 1.63
Infant birth weight
≥ 2500 g 121 (13.6) 767 (86.4) 1.00
< 2500 g 6 (13.0 40 (87.0) 0.95 0.39, 2.29
Gestational age
≥ 37 weeks 120 (13.9) 746 (86.1) 1.00
< 37 weeks 7 (10.3) 61 (89.7) 0.71 0.32, 1.60
Method of delivery
Vaginal 94 (14.4) 558 (85.6) 1.00
Caesarean 33 (11.7) 249 (88.3) 0.79 0.52, 1.20
Breastfeeding initiation
No 23 (30.7) 52 (69.3) 1.00
Yes 104 (12.1) 755 (87.9) 0.31*** 0.18, 0.53
Feeding method at 4 weeks
Fully breastfed 62 (10.6) 524 (89.4) 1.00
Partially breastfed 13 (9.0) 131 (91.0) 0.84 0.45, 1.57
Fully formula fed 52 (25.5) 152 (74.5) 2.89*** 1.92, 4.36
Smoking status of the mother postpartum
No 100 (11.8) 751 (88.2) 1.00
Yes 27 (32.5) 56 (67.5) 3.62*** 2.19, 6.00
Smoking status of the mother during pregnancy
No 108 (12.2) 775 (87.8) 1.00
Yes 19 (37.3) 32 (62.7) 4.26*** 2.33,7.78
Alcohol drinking status of the mother postpartum
No 78 (12.3) 554 (87.7) 1.00
Yes 49 (16.2) 253 (83.8) 1.38 0.93, 2.03
Alcohol drinking status of the mother during pregnancy
No 111 (13.2) 731 (86.8) 1.00
Yes 16 (17.4) 76 (82.6) 1.39 0.78, 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