Regression coefficients derived from regression: Caries experience (d3t, D3T) as dependent variable and environmental or behavioural risk factors as independent variables.

Other non-significant variables included in the models were not presented here. These were: for the 6 yrs group: sex, region, type of school, mother employment status; for the 9 yrs group: sex, region, type of school, mother and father employment status; for the 12 yrs group: sex, region, type of school, dental fear, smoking status.N: Number, CI: confidence interval, NI: not investigated, ns: not significantRegression coefficients derived from regression: Caries experience (d3t, D3T) as dependent variable and environmental or behavioural risk factors as independent variables.