Large variation in participant eligibility criteria used in plantar heel pain research studies - a systematic review.
Henrik RielMelanie Louise PlinsingaEamonn DelahuntMartin Bach JensenKarl B LandorfMarienke van MiddelkoopEdward RoddyMichael Skovdal RathleffBill VicenzinoJens Lykkegaard OlesenPublished in: Journal of foot and ankle research (2022)
Participant eligibility criteria in studies on plantar heel pain vary widely; studies differed substantially in their use of quantitative thresholds. Participant characteristics of samples in studies were associated with the criteria used. This study emphasises a need for adjusting for participant heterogeneity in systematic reviews to improve their validity.