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Table 3 RRRs* for the likelihood of 10-11 year old children in Wales providing 'low' or 'high'** cotinine concentrations post-legislation

From: Changes in child exposure to secondhand smoke after implementation of smoke-free legislation in Wales: a repeated cross-sectional study

  Low (<0.10 ng/ml) High (>0.50 ng/ml)
  RRR (95% CI) p-value RRR (95% CI) p-value
Whole sample unadjusted (n = 2839) 1.32 (1.09 to 1.59) <0.01 1.09 (0.90 to 1.31) 0.38
Whole sample adjusted for age, FAS and time of day data collected
(n = 2786)
1.39 (1.14 o 1.69) <0.01 1.11 (0.92 to 1.34) 0.28
  1. * RRR = Relative risk ratios
  2. ** medium tertile set as base category