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Table 2 Characteristics of the two cohorts

From: Toothbrushing: to the best of one’s abilities is possibly not good enough

  1995 cohort 1992 cohort p (exact test)
sex male/female male/female 0.491
42/54 43/58
at least one parent has university entrance diploma (UED) no UED/UED no UED/UED 0.085
36/60 51/50
brushing hand in video right/left/both right/left/both 0.886
85/7/4 85/10/6