[Tooth brushing training in the lower grades of primary school. (2) Statistical investigation (author's transl)].
D000367:Age Factors; D002648:Child; D002675:Child, Preschool; D005260:Female; D006801:Humans; D007564:Japan; D008297:Male; D009034:Mother-Child Relations; D014039:Toilet Training; D014099:Toothbrushing