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Table 4 Adjusted associations between specific-gravity adjusted urinary fluoride concentration and sleep measures (n = 1303)

From: Fluoride exposure and duration and quality of sleep in a Canadian population-based sample

Outcome Association (95% CI) for change in outcome per:  
0.5 mg/L IQR (0.62 mg/L) p
Sleep Durationa
 Less than recommended 1.02 (0.93, 1.13) 1.02 (0.94, 1.10) .64
 Recommended (ref)  
 More than recommended 0.91 (0.74, 1.13) 0.93 (0.80, 1.10) .40
Trouble Sleepingb 0.96 (0.89, 1.04) 0.97 (0.91, 1.03) .37
Daytime Sleepinessb 1.00 (0.92, 1.08) 1.00 (0.94, 1.06) .95
  1. aRelative risk ratios (RRR)
  2. bOdds Ratio (OR)