Descriptive, socio-economic and behavioral characteristics of study participants (T1 n = 55, T2 n = 92, T3 = 82 and T4 = 78).

* An independent sample t-test was applied to normal data (age) and Man-Whitney for non-normal data (BMI, education, employment, marital status, own income and breastfeeding)1 Age and BMI are presented as mean ± SD2 BMI pre-pregnancy3 University or University College4 Data not requested at time point 3 and 4 (no new recruitment)5 100 000 NOK ≈ 14 000 EURDescriptive, socio-economic and behavioral characteristics of study participants (T1 n = 55, T2 n = 92, T3 = 82 and T4 = 78).