Table 3.

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

	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

* RRR = Relative risk ratios

** medium tertile set as base category