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 4 Cumulative incidence of developing dental caries in the maxillary and mandibular teeth of the FPMs

Tooth site	Sealant group			Control group			χ² value	P value
Tooth site	All the FPMs	Dental caries	cumulative incidence of caries (%)	All the FPMs	Dental caries	cumulative incidence of caries (%)	χ² value	P value
Maxilla	12234	821	6.71*	10917	1194	10.94*	129.68	< 0.001
Mandible	1768	160	9.05	2044	335	16.39	45.20	< 0.001
Total	14002	981	7.01	12961	1529	11.80	182.98	< 0.001

FPMs = first permanent molars; * compare cumulative incidence of caries between maxilla and mandible, P < 0.001

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