Status:
COMPLETED
Learning Mechanisms for Placebo and Nocebo Studies on Somatosensory Sensations: a Systematic Review and Meta-analysis.
Lead Sponsor:
Leiden University Medical Center
Collaborating Sponsors:
Universiteit Leiden
Conditions:
Pain
Itch
Eligibility:
All Genders
Brief Summary
Placebo and nocebo effects are defined as the positive and negative effects occurring after the (supposed) administration of an inert treatment, which, through a given learning process, is believed to...
Detailed Description
Research questions include: 1. What is the average magnitude of placebo or nocebo effects on pain and on itch, across included studies? 2. Across studies that tested multiple learning processes for p...
Eligibility Criteria
Inclusion
- Inclusion Criteria:
- Studies using experimental induction of placebo and/or nocebo effects on somatosensory sensations (i.e., pain and/or itch), which necessitates the (supposed) administration of an inert treatment, which, through a given learning process, is believed to have positive or negative effects.
- This review will include original, controlled experimental studies on healthy participants that employed learning-based inductions of placebo and/or nocebo effects on somatosensory sensations. The studies should be written in English, German or Dutch, available full-text, and published in a peer-reviewed journal. No year restrictions on publication date will be imposed.
Exclusion
Key Trial Info
Start Date :
March 1 2019
Trial Type :
OBSERVATIONAL
Allocation :
ACTUAL
End Date :
December 1 2021
Estimated Enrollment :
130 Patients enrolled
Trial Details
Trial ID
NCT04387851
Start Date
March 1 2019
End Date
December 1 2021
Last Update
January 11 2022
Active Locations (1)
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1
Leiden University
Leiden, South Holland, Netherlands, 2333 AK