Prevalence of First Permanent Molar Caries in and Its Relationship to the Dental Knowledge of 9–12-Year Olds from Jeddah, Kingdom of Saudi Arabia

Table 1

Number (%) of children who presented with and without caries of the first permanent molar in relation to age (𝑁=432).

Age in years	All molars sound		One or more carious molars		One molar carious		Two molars carious		Three molars carious		All molars carious		Total
	𝑁	%	𝑁	%	𝑁	%	𝑁	%	𝑁	%	𝑁	%	𝑁	%
9	36	33	72	67	28	26	28	26	14	13	2	2	108	100
10	32	30	76	70	36	34	26	24	8	7	6	5	108	100
11	20	19	88	81	24	22	36	34	20	19	8	6	108	100
12	18	17	90	83	24	23	30	28	25	23	11	9	108	100
Total	106	25	326	75	112	26	120	28	67	15	27	6	432	100

Chi-square (𝜒²)=30.3,𝑃<0.05 significant.