Procedure
Eligible participants were scheduled for an appointment at the MHC for HRV-registration and the baseline questionnaires were completed via an on-line questionnaire that was sent to them via e-mail. Also, participants were referred to a health care centre to leave their blood samples before randomization – they informed the research team via e-mail once they had left the blood sample. After baseline assessments, an independent administrator randomised the participants to either MBCP or Lamaze, according to a sequence generated in SPSS in blocks of 10. MBCP participants joined the program within two weeks after baseline assessment, and Lamaze participants joined this program at between three and five weeks after baseline assessment. This strategy was applied as the Lamaze program was shorter than the MBCP program. At ten to twelve weeks after the baseline assessment both groups completed post-intervention assessments.