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Blinded experiment
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====Pain==== A 2018 [[meta-analysis]] found that assessment of blinding was reported in only 23 out of 408 randomized controlled trials for chronic pain (5.6%). The study concluded upon analysis of pooled data that the overall quality of the blinding was poor, and the blinding was "not successful." Additionally, both pharmaceutical sponsorship and the presence of side effects were associated with lower rates of reporting assessment of blinding.<ref>{{cite journal |last1=Colagiuri |first1=Ben |last2=Sharpe |first2=Louise |last3=Scott |first3=Amelia |title=The Blind Leading the Not-So-Blind: A Meta-Analysis of Blinding in Pharmacological Trials for Chronic Pain |journal=The Journal of Pain |volume=20 |issue=5 |pages=489β500 |date=September 2018 |doi=10.1016/j.jpain.2018.09.002 |pmid=30248448 |s2cid=52813251 |url=https://www.jpain.org/article/S1526-5900(18)30603-5/abstract |access-date=22 April 2019 |language=en |issn=1526-5900|doi-access=free }}</ref>
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