Assessment of study quality

HW H Wang
JL J Lu
JF J Feng
ZW Z Wang
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The methodological quality of each study was evaluated using the Jadad composite scale, which assesses descriptions of randomisation, blinding, withdrawals and dropouts.8 The quality scale ranged from 0 to 5 points. A study with a score of ≥3 points was regarded as high quality whereas a score of <3 indicated a low quality report.

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