Mean comparisons of urinary fluoride (Cycles 2 and 3) and fluoride concentration of tap water (Cycle 3) between those with and without a self-reported diagnosis of a thyroid condition among the constrained fluoride urine subsample (weighted and bootstrapped)
| Cycle 2 of CHMS | Cycle 3 of CHMS | ||
| Mean urinary fluoride (μmol/L) for the constrained fluoride subsample* (n=~390) | Mean urinary fluoride (μmol/L) for the constrained fluoride subsample† (n=~590) | Mean fluoride concentration of tap water (mg/L) for the constrained fluoride subsample† (n=~590) | |
| Has not been diagnosed with a thyroid condition | 41.61 (34.50 to 48.72) | 34.18 (26.30 to 42.06) | 0.35 (0.20 to 0.49) |
| Has been diagnosed with a thyroid condition | 38.60 (30.12 to 47.00) | 39.58 (29.27 to 49.89) | 0.33 (0.16 to 0.51) |
*For Cycle 2, the constrained fluoride urine subsample refers to respondents who: 1) attended a fluoridated data collection site, 2) identified tap water was their primary source of drinking water at home or away from home and, 3) lived in their current home for three or more years.
†For Cycle 3, the constrained fluoride urine subsample refers to respondents who: 1) attended a fluoridated data collection site, 2) reported using fluoride-containing dental products at home and, 3) reported ever receiving fluoride treatments at the dentist.
CHMS, Canadian Health Measures Survey; TSH, thyroid-stimulating hormone.