With the proposed study, the investigators aim to evaluate the long-term efficacy of the open-label placebo (OLP) intervention in premenstrual syndrome (PMS) and to contribute to a broader understanding of how OLPs work. It is planned to survey participants of the intervention groups (OLP+ and OLP-) regarding symptom intensity and impairment due to PMS after the conclusion of our randomized controlled trial (RCT) and intervention provision. Additionally, it will be examined if there is a difference between the OLP group with and without a treatment rationale (OPL+ vs. OLP-) across time. More precisely, it will be investigated whether participants of the intervention groups with and without treatment rationale experience any long-term improvement.
Study Type
OBSERVATIONAL
Enrollment
66
Online Assessment which consists of: * Sociodemographic data (life changes, medical and gynaecological history) * German PMS symptom diary retrospectively for last menstrual cycle * Quality of Life Inventory (SF-12) * Expectancy of relief
University of Basel, Faculty of Psychology, Division of Clinical Psychology and Psychotherapy
Basel, Switzerland
Symptom intensity of premenstrual syndrome
The items of the German PMS \[Premenstrual Syndrome\] Symptom diary will be used to measure symptom intensity retrospectively for the last luteal phase ( i.e., PMS phase). The scale consists of 27 items measured on a 6-point Likert scale. A decrease in scores indicates an improvement in symptom intensity. The minimum score is zero; the maximum 162.
Time frame: One time assessment at baseline (the start day 1-3 of the next menstrual cycle retrospectively for the last luteal phase)
Interference of premenstrual syndrome
The items of the German PMS \[Premenstrual Syndrome\] Symptom diary will be used to measure interference retrospectively for the last luteal phase ( i.e., PMS phase). The scale consists of 3 items measured on a 6-point Likert scale. A decrease in scores indicates an improvement in interference. The minimum score is zero; the maximum 162.
Time frame: One time assessment at baseline (the start day 1-3 of the next menstrual cycle retrospectively for the last luteal phase)
Quality of life (Short-Form-12)
Quality of life will be measured by means of the SF-12 (Short-Form-12) questionnaire retrospectively for the last luteal phase (i.e., PMS phase). The questionnaire comprises 12 questions, and quality of life is measured on a 6-point Likert scale. Two summary scores can be calculated: a mental component and a physical component score. Scores range from 0-100, with higher scores indicating better functioning.
Time frame: One time assessment at baseline (the start day 1-3 of the next menstrual cycle retrospectively for the last luteal phase)
Partnership satisfaction (Zufriedenheit in der Partnerschaft: ZIP)
Partnership satisfaction will be measured by means of the ZIP (Zufriedenheit in der Partnerschaft) questionnaire retrospectively for the last luteal phase (i.e., PMS phase). The questionnaire comprises 7 questions, and partnership satisfaction is measured on a 5-point rating scale. Scores range from 7 to 35.
Time frame: One time assessment at baseline (the start day 1-3 of the next menstrual cycle retrospectively for the last luteal phase)
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