... identified in 48 and 26% of the children, respectively. Bivariate analyses at the surface level showed neither an association between demarcated/diffuse opacity and caries experience (p ≧ 0.64, GLM), nor between the presence of hypoplastic surfaces and non-cavitated lesions (p = 0.29, GLM). The multivariate...

... (p < 0.05; χ 2 test). Caries prevalence decreased by almost a half from 1996 to 2006. Differences in the mean caries scores at surface level, which included non-cavitated lesions, were observed for all age groups (p < 0.002; Mann-Whitney test) indicating a reduction in the rate of caries...