Table 4.

Between-group differences in mean number of dental caries

Variable	Orthodontic treatment	Mean	SE	95% CI	P-value*
DT	Yes	0.43	0.048	0.34–0.53	<0.001
	No	0.74	0.024	0.70–0.79
Adjusted DT†	Yes	0.66	0.059	0.55–0.78	<0.001
	No	0.94	0.039	0.87–1.02
DMFT	Yes	6.58	0.188	6.21–6.95	0.212
	No	6.82	0.071	6.68–6.96
Adjusted DMFT†	Yes	7.55	0.219	7.12–7.98	0.167
	No	7.27	0.113	7.05–7.50

DMFT, decayed, missing and filled teeth; DT, decayed teeth; SE, standard error.

^*P-value calculated using a complex samples general linear model t-test.

^†Adjusted for confounding factors (age, sex, income, education, smoking, alcohol consumption, toothbrushing frequency, use of oral health-care product and professional oral examination).