Effect of internet-based counselling with a cognitive-behavioural approach on premenstrual syndrome.

We provide data generated in a randomized controlled trial with two-parallel arms carried out on 92 female university students aged 18-35 years who had moderate to severe PMS, residing at halls of the Tabriz University of Medical Sciences. PMS severity was assessed during two menstrual cycles before intervention (baseline) and during two cycles just after ending the two-month intervention using Daily Record of Severity of Problems (DRSP) and the quality of life using the Quality of Life Enjoyment and Satisfaction Questionnaire-Short Form (Q-LES-Q-SF) on days 1-2 and 11-13 of the menstrual cycle at the baseline and post-intervention. Also, the PMS-related disability was assessed using Sheehan Disability Scale (SDS) and attitude toward menstruation using Menstrual Attitude Questionnaire (MAQ) at the baseline and post-intervention. Participant satisfaction and views on intervention effectiveness were also assessed using a single Likert question.