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Is the perceived placebo effect comparable between adults and children? A meta-regression analysis
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Is the perceived placebo effect comparable between adults and children? A meta-regression analysis
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Is the perceived placebo effect comparable between adults and children? A meta-regression analysis
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Journal Article
Is the perceived placebo effect comparable between adults and children? A meta-regression analysis
2017
Overview
Background:
A potential larger perceived placebo effect in children compared with adults could influence the detection of the treatment effect and the extrapolation of the treatment benefit from adults to children. This study aims to explore this potential difference, using a meta-epidemiological approach.
Methods:
A systematic review of the literature was done to identify trials included in meta-analyses evaluating a drug intervention with separate data for adults and children. The standardized mean change and the proportion of responders (binary outcomes) were used to calculate the perceived placebo effect. A meta-regression analysis was conducted to test for the difference between adults and children of the perceived placebo effect.
Results:
For binary outcomes, the perceived placebo effect was significantly more favorable in children compared with adults (β = 0.13;
P
= 0.001). Parallel group trials (β = −1.83;
P
< 0.001), subjective outcomes (β = −0.76;
P
< 0.001), and the disease type significantly influenced the perceived placebo effect.
Conclusion:
The perceived placebo effect is different between adults and children for binary outcomes. This difference seems to be influenced by the design, the disease, and outcomes. Calibration of new studies for children should consider cautiously the placebo effect in children.
