Sample size, sampling, and randomization
PMS
Following a similar studyParticipants were recruited and assessed for eligibility by the first investigator among women 20–40 years old who referred to the comprehensive health centers in Arsanjan, had willingness to participation in the study, and had the self-reported PMS. 153 women who assessed for eligibility were asked to complete the PMS calendar for two consecutive menstrual cycles (to confirm of PMS with an increase of at least 30% in PMS in the second half of the menstrual cycle compared to the first half) The CONSORT flow diagram.