Data subsets for analysis.

N = Total number of sealed teeth in trials; Nu = Number of unique sealed teeth; DS = Number of datasets; A = Number of separate studies (clustering repeated observation points and/or testing of more than one material in a study); B = number of separate studies (clustering repeated observation points in a trial, only). Mat 1 = Resin based sealant; Mat 2 = Glass-ionomer based sealant; main = Main analysis result; sens = Sensitivity analysis result.