Table 1.

Characteristics of participants according to age category

Variable	Age category (yr)
	5	8	11	14	17	20	23
	n
	302	363	453	619	434	438	413
Characteristics
Male gender	54.9	54.0	49.8	46.5	43.3	39.3	35.7
Low socio‐economic status	40.3	38.8	40.8	41.0	38.8	34.7	36.9
Mother with Dutch ethnicity	83.1	87.8	88.9	85.0	82.4	85.3	83.7
Oral health behaviour
Toothbrushing twice daily	73.9	85.4	82.1	80.6	71.3	73.3	72.6
Dental check‐up every 6 months	78.2	87.1	89.7	84.0	82.9	67.1	65.6

Values are given as %.