The anticaries effects of pit and fissure sealant in the first permanent molars of school-age children from Guangzhou: a population-based cohort study

Table 2 Cumulative incidence and relative risk of developing dental caries in the first permanent molars by sex and area

	Sealant group			Control group			Adjusted HR^* (95% CI)	P value
	N	Case	Cumulative incidence of caries (%)	N	Case	Cumulative incidence of caries (%)	Adjusted HR^* (95% CI)	P value
Sex
Male	2515	315	12.5	2434	522	21.4	0.59 (0.51–0.68)	< 0.001
Female	2307	387	16.8	1962	499	25.4	0.66 (0.58–0.76)	< 0.001
District area
Urban	4107	581	14.1	3608	787	21.8	0.65 (0.58–0.72)	< 0.001
Rural	715	121	16.9	788	234	29.7	0.56 (0.45–0.70)	< 0.001
Total	4822	702	14.6	4396	1021	23.2	0.63 (0.57–0.69)	< 0.001

FPMs = first permanent molars, HR = hazard ratio, CI = confidence interval. * using Cox model, adjusting for children sex and district area appropriately

ISSN: 1472-6831