Homecare protective and risk factors for early childhood caries in Japan

Table 2 Status of teeth at baseline and follow-up (n = 566)

	Baseline		Follow-up
	n	%	n	%
Number of children with one or more untreated teeth
d = 0	566	100.0	411	72.6
d ≥ 1	–	–	155	27.4
Number of children with one or more treated teeth
f = 0	566	100.0	526	92.9
f ≥ 1	–	–	40	7.1
Caries
Never had caries	566	100.0	393	69.4
Had treated or untreated tooth	–	–	173	30.6
Plaque accumulation
No plaque	254	44.9	481	85.0
Low level of plaque	267	47.2	81	14.3
High level of plaque	41	7.2	0	0.0
Not available	4	0.7	4	0.7

d: decayed primary teeth
f: filled primary teeth
Plaque accumulation at baseline on the surface of a child’s maxillary central and lateral incisors
Plaque accumulation at follow-up on the surface of any of a child’s teeth
Low level of plaque: covering less than one third of labial surface area of one or more teeth
High level of plaque: covering one third or more of a labial surface area of one or more teeth

ISSN: 1347-4715