From:  Oral health conditions and hygiene procedures in patients with Parkinson’s disease: a systematic review

Instrument for methodological quality for RCT studies using Cochrane Risk of Bias Tool

PaperSelection biasPerformance biasDetection biasAttrition biasReporting biasOther bias
Baram et al. [21], 2020-++--+

+: bias present; -: bias not present; RCT: randomized clinical trial