Skip to main content

Table 6 Adjusted hazard ratio (95% confidence interval) of self-reported menarche according to urinary fluoride in girlsa

From: Fluoride exposure and pubertal development in children living in Mexico City

  Specific-gravity adjusted childhood urinary fluoride
N HR (95% CI) p-value
Menarche
 Continuous fluoride (mg/L) 175 0.82 (0.51, 1.33) 0.42
 1st tertile (< 0.48) 68 Reference
 2nd tertile (0.49–0.69) 53 0.98 (0.64, 1.51) 0.94
 3rd tertile (0.70–2.61) 55 0.76 (0.50, 1.17) 0.21
  1. HR hazard ratio, CI confidence interval
  2. aAll estimates are from Cox proportional-hazard models adjusted for maternal education and marital status, child BMI z-score and number of siblings at birth