Table 2.

Associations between introduction to solid food (weeks 5–16, weeks 17–25, weeks 25+) and infant, maternal, attachment and feeding characteristics estimated by ordered logistic regression (N = 4066)

		Model 1		Model 2
Characteristics	Value	OR	95% CI	OR	95% CI
Infant factors
Gestational age at birth	Weeks	0.95*	0.92:0.99	0.96*	0.92:1.00
Weight at birth	Kilograms	0.78**	0.68:0.90	0.70***	0.59:0.83
Sexa	Girl	1.21**	1.06:1.38	1.20**	1.05:1.37
Maternal factors
Age	Years	1.06***	1.04:1.07	1.05***	1.04:1.07
BMI	Mass(kg) / Height(m)2	0.99*	0.97:1.00	0.96	0.93:1.00
Educationb	Intermediate education	1.18*	1.02:1.37	1.19*	1.03:1.38
	Long education	1.52***	1.25:1.84	1.52***	1.25:1.85
Smokingc	No	1.52***	1.21:1.91	1.52***	1.21:1.92
Parityd	Multipara	1.15	0.99:1.33	1.73**	1.17:2.57
Attachment factors
Recognise cues of hunger week 0-5e	Always	1.27***	1.11:1.45	1.27**	1.11:1.45
Perceived infant temperamentf	Not temperamental	1.45***	1.18:1.78	1.77***	1.35:2.33
Feeding factors
Breastfed or formula-fed at week 5g	Formula and breastfed	1.75***	1.30:2.35	1.72***	1.27:2.33
	Only breastfed	2.51***	1.94:3.26	2.52***	1.93:3.28
Interactions
BMI x feeding in week 5h	BMI for formula and breastfed			0.99	0.94:1.03
	BMI for only breastfed			1.03	0.99:1.08
Parity x perceived temperamenti	Multipara and not temperamental			0.63*	0.42:0.95
Birth weight x recognise cuesj	Kilograms and always			1.29*	1.03:1.62

Note: Model 1 included all main effects of factors that were statistically significant in single-factor analyses. Model 2 included also statistically significant interactions between these factors.

Associations are expressed as adjusted odds ratios. Missing values excluded. Wald test of the interaction between maternal BMI and feeding in week 5 : p = 0,011.

Reference categories: ^aBoy, ^bNone or short education, ^cYes, ^dPrimipara, ^eNot always, ^fVery temperamental, ^gOnly formula-fed, ^hBMI and Only formulafed, ⁱPrimipara and Very temperamental, ^jKilograms and Not always.

*p < 0.05, **p < 0.01, ***p < 0.001.