Table 1.

Maternal characteristics associated with consumption of organic food among 28 192 pregnant women in the Norwegian Mother and Child Cohort Study 2002–2008

	Consumption of any organic food group, (sum index)
n (%)	Low 25 699 (91.2)	Frequent 2493 (8.8)
	Mean±SD	Mean±SD
Maternal age, years	28.6±4.3	27.6±4.9**
Maternal body mass index	23.8±4.1	23.3±3.9**
Gestational weight gain, kg	15.2±6.0	15.5±6.5†
Energy intake, MJ/day	9.51±2.5	10.0±2.9**
	Per cent	Per cent
Maternal education ≤12 years	25.5	37.7**
Maternal education 17+years	27.1	28.6*
Smoking in pregnancy‡	6.6	11.0**
High household income§	29.7	23.1**
Alcohol in pregnancy (yes/no)	9.3	9.3
Hypertension prior to pregnancy (yes/no)	0.5	0.2*
High score ‘healthy’ food pattern¶ (yes/no)	36.0	50.2**

Independent samples t test (continuous variables), χ² (categorical variables): *p<0.05, **p<0.001, †0.05>p<0.01.

‡Comprise occasional and daily smoking.

§High income denotes that both participant and her partner have annual income ≥300 000 NOK.

¶High score denotes upper third on pattern scores. The food pattern is described in detail in Torjusen et al.³³