Cohort characteristics.

<p>P values were calculated with ANOVA or with chi-square test (marked with ¶).</p>1<p>Mean values and standard deviations.</p>2<p>Mean numbers of pregnancies in women with at least one pregnancy.</p>3<p>Mean amounts of cigarettes among those who smoke.</p>4<p>Physical activity scaled from 1 to 5; 1 representing no exercise and 5 representing hard training more that twice a week.