Abstract:
BACKGROUND:Beneficial effects of placebos are high in double-blind hot flush trials. Studies in various conditions suggest that honestly prescribed placebos may elicit symptom improvement. OBJECTIVE:To determine whether open label placebo (OLP) treatment is efficacious in alleviating hot flushes among peri- and postmenopausal women. METHODS/DESIGN:In this assessor-blinded, randomized-controlled trial, n = 100 women experiencing five or more daily hot flushes of at least moderate severity and bothersomeness are assigned 1:1 to a 4-week OLP treatment or no treatment. To explore the duration and maintenance of placebo effects, the OLP group is randomized a second time to either discontinue or continue the OLP treatment for another 4 weeks. All participants receive a briefing about placebo effects and study visits at baseline, post-treatment (4 weeks), and follow-up (8 weeks, OLP group only). Qualitative interviews about subjective experiences with the OLP treatment are conducted. Primary outcomes are differences between the OLP and the no-treatment group in the hot flush composite score (frequency × severity), and bothersomeness of hot flushes as assessed with the Hot Flush Rating Scale at post-treatment. Secondary outcomes include hot flush frequency, health-related quality of life, global improvement, and the number of responders at post-treatment. Data are analyzed by fitting (generalized) linear mixed models. An exploratory analysis of maintenance and duration is performed including follow-up data. DISCUSSION:This trial will contribute to the evaluation of OLP treatments in clinical practice and further our understanding about the magnitude of placebo effects in hot flush treatments. TRIAL REGISTRATION:Clinicaltrials.gov, NCT03838523 . Retrospectively registered on February 12th, 2019. The first patient was enrolled on October 10th, 2018.
journal_name
Trialsjournal_title
Trialsauthors
Pan Y,Meister R,Löwe B,Winkelmann A,Kaptchuk TJ,Buhling KJ,Nestoriuc Ydoi
10.1186/s13063-019-3575-1subject
Has Abstractpub_date
2019-08-16 00:00:00pages
508issue
1issn
1745-6215pii
10.1186/s13063-019-3575-1journal_volume
20pub_type
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