Randomization and masking
Research Randomizer was used to generate a random serie based on block-randomization in blocks of four. The random serie was transferred to sequentially numbered closed sealed opaque envelopes, each containing group assignment. Each woman was randomized after she answered all questionnaires at the first assessment. Participants and investigators were not blinded to group allocation due to the nature of the intervention. A total number of 370 women were randomized and allocated into four groups: group 1; Group education (GE), group 2: GE and person-centered individual support (PCS), group 3: PCS and group 4: Control group not receiving any intervention. All participants were informed that they could also seek health care advice wherever they wished outside the scope of the study.