Table 3

Unadjusted and adjusted ORs of upper tertile hypothyroidism prevalence according to water fluoridation by provider

ORFluoride level OR 95% CI
Unadjusted
 West Midlands (yes)1.5361.156 to 2.041
Greater Manchester (no) 1
Adjusted*
 West Midlands (yes)1.9351.388 to 2.699
Greater Manchester (no) 1
  • *Adjusted for proportion of women registered with the practice, proportion of patients over 40 years old registered with the practice, Index of Multiple Deprivation categories (16.16–28.4; 28.41–68.36). C-index=0.81.