کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
2621085 | 1135667 | 2011 | 9 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Headache: the Placebo Effects in the Control Groups in Randomized Clinical Trials; an Analysis of Systematic Reviews Headache: the Placebo Effects in the Control Groups in Randomized Clinical Trials; an Analysis of Systematic Reviews](/preview/png/2621085.png)
ObjectiveThe purpose of this study is to describe the effects in the placebo and “no treatment” arms in trials with headache patients.MethodThis is a secondary analysis of randomized controlled trials from 8 systematic reviews and selected trials with a “no treatment” or placebo control group. The different types of “no treatment” and placebo interventions were assessed and classified into 6 subgroups. The analyses were carried out according to type of outcome variable.ResultsIn total, 119 studies were included (7119 participants). The mean recovery rate in all control groups was 35.7%. Significantly more participants recovered in control groups of pharmacological studies than in nonpharmacological studies: 38.5% vs 15.0%, respectively. Adults were more likely to recover in nonpharmacological studies and children in pharmacological studies.ConclusionsThe mean recovery rate in the control groups was 36%. The recovery rate varied substantially between type of intervention and patients.
Journal: Journal of Manipulative and Physiological Therapeutics - Volume 34, Issue 5, June 2011, Pages 297–305