There are multiple definitions:

1. participation to prevalence ratio(English)

   • calculated by dividing the proportion of the population of interest enrolled in each type of RCT by the corresponding proportion of US disease or risk factor prevalence. PPRs <0.8 indicate underrepresentativeness and >1.2 indicate overrepresentativeness
   • PRISMA, RCT
   • Ratio-based metric, Statistics, Ethnicity, Clinical trials
   • https://doi.org…JAHA.124.037375
   • https://doi.org…ardio.2018.2559

2. professional plaque removal(English)

   • CHX, CPC, PiM
   • Hygiene, Dentistry
   • https://doi.org…784-020-03474-3