Fig. 2From: Outcomes in randomised controlled trials in prevention and management of carious lesions: a systematic reviewLogarithmic scale frequency distribution of the number of participants per trial (n = 252,099), by trial type. Participants in trials of caries management n = 43,282 (range = 7–8027) and for caries prevention trials n = 208,817 (range = 10–8027)Back to article page