Table 1

Summary of variables considered for the predictive models

All practices
Mean±SD
N (number of practices)7935
List size (number of patients)7022±4281
Hypothyroidism prevalence (%)3.18±1.05
Mean fluoride (mg/L)0.22±0.27
Maximum fluoride (mg/L)0.28±0.32
Patients aged >40 (%)49.0±10.1
Females (%)49·9±2·4
Index of multiple deprivation score23.84±12.23