Table 3.

Adjusted odds ratios (OR) of the relations between predominant type of formula used and parental and child characteristics, and type of physician consulted (n = 1354)

	Type of formula milk (Regular as reference, n = 463)								Globa l P‐value*
	Partially hydrolysed (n = 176)		Thickened (n = 187)		Pre‐/probiotics (n = 293)		Others (n = 235)
	OR	95% CI	OR	95% CI	OR	95% CI	OR	95% CI
Parental characteristics
Maternal education (Ref: No degree)									0.10
High school degree	1.26	0.68–2.36	1.33	0.80–2.19	1.38	0.88–2.17	1.07	0.65–1.77
2‐year university degree	1.38	0.75–2.54	0.86	0.49–1.49	1.20	0.75–1.92	1.36	0.82–2.34
≥3‐year university degree	2.37	1.31–4.27	0.94	0.53–1.64	1.31	0.81–2.10	1.69	1.02–2.78
Monthly family income (Ref: 1501–2300€)									0.54
<1501	1.06	0.56–2.00	0.93	0.53–1.61	0.81	0.49–1.36	0.78	0.46–1.33
2301–3000	1.05	0.63–1.75	0.97	0.60–1.58	1.50	0.83–1.87	1.12	0.73–1.73
>3000	1.57	0.91–2.71	1.57	0.91–2.70	1.51	0.95–2.39	1.06	0.64–1.75
Parity (Ref: 1)									<0.001
2	0.64	0.40–0.98	1.65	1.11–2.46	1.28	0.91–1.80	1.13	0.78–1.65
≥3	0.27	0.14–0.50	0.71	0.40–1.29	0.63	0.38–1.02	0.62	0.37–1.03
Mother returned to employment in the first 4 months (Ref: No)	0.85	0.57–1.28	1.49	1.01–2.22	1.17	0.84–1.64	0.83	0.57–1.19	0.05
Family history of allergy (Ref: No)	2.11	1.44–3.08	1.49	1.04–2.14	1.19	0.87–1.61	1.32	0.95–1.83	0.002
Country of birth (Ref: Both born in France)									0.19
One of them born outside France	0.87	0.46–1.66	1.25	0.64–2.45	1.70	0.91–3.17	0.77	0.45–1.31
Child characteristics
Female gender (Ref: Male)	0.96	0.66–1.40	0.82	0.57–1.18	1.00	0.73–1.36	1.12	0.80–1.55	0.68
Duration of EBF (months)	1.48	1.25–1.75	0.73	0.60–0.89	1.02	0.88–1.90	1.01	0.86–1.18	<0.001
Gestational age (weeks of amenorrhoea)	0.94	0.82–1.09	0.93	0.82–1.06	1.03	0.91–1.15	0.91	0.81–1.02	0.32
Birthweight (g)	1.27	0.79–2.03	0.87	0.55–1.37	0.84	0.57–1.25	0.69	0.45–1.05	0.20
Occurrence of diarrhoea between birth and 4 months (Ref: No)	0.74	0.46–1.20	0.66	0.43–1.02	0.73	0.50–1.08	0.94	0.63–1.39	0.25
Occurrence of regurgitations between birth and 4 months (Ref: No)	0.99	0.68–1.45	2.68	1.80–3.98	1.74	1.27–2.39	1.48	1.06–2.08	<0.001
Other variables
Recruitment centre: Nancy (Ref: Poitiers)	0.58	0.39–0.86	0.89	0.61–1.30	0.86	0.62–1.18	0.92	0.65–1.30	0.10
Type of physician consulted between birth and 4 months (Ref: GP)									0.10
Paediatrician	1.46	0.84–2.53	1.14	0.65–1.97	1.57	1.01–2.46	1.82	1.11–2.99
GP and paediatrician	1.22	0.74–1.99	1.41	0.89–2.23	1.16	0.77–1.73	1.73	1.11–2.67
Specialist with/no GP or paediatrician	1.95	1.13–3.36	1.71	1.01–2.89	1.71	1.09–2.69	1.98	1.20–3.27

^* Multinomial logistic regression with regular formula as a reference group.

CI, confidence interval; EBF, exclusive breastfeeding; GP, general practitioner.