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Table 5.7 Self-reported cotinine validated non-smokers exposure to second-hand smoke, 2016/2017 combined, by age and sex

Self-reported non-smokers aged 16 and over with valid saliva cotinine measurementa 2016/2017 combined
Saliva cotinine level (ng/ml) Age Total
16-44 45-64 65+  
% % % %
Men
Geometric mean saliva cotinineb 0.09 0.07 0.07 0.08
Confidence interval (0.08-0.12) (0.06-0.09) (0.06-0.09) (0.07-0.09)
Exposed to cotininec 34 20 17 25
Women
Geometric mean saliva cotinineb 0.08 0.08 0.07 0.08
Confidence interval (0.07-0.10) (0.07-0.09) (0.06-0.08) (0.07-0.09)
Exposed to cotininec 25 25 17 23
All adults
Geometric mean saliva cotinineb 0.09 0.07 0.07 0.08
Confidence interval (0.08-0.10) (0.07-0.08) (0.06-0.08) (0.07-0.09)
Exposed to cotininec 29 23 17 24
Bases (weighted):
Men 217 187 123 527
Women 260 207 160 626
All adults 477 394 282 1153
Bases (unweighted):
Men 165 164 158 487
Women 252 243 211 706
All adults 417 407 369 1193

a To be included within this category, participants had to be both self-reported non-smokers and have a saliva cotinine level lower than 12ng/ml.
b Geometric means have been presented for non-smokers as their cotinine data have a very skewed and exponential distribution. A geometric mean is an average calculated by multiplying the values of the cases in the sample and taking the nth root, where n is the number of cases. As 95% confidence intervals for the geometric means are more complicated to calculate than for arithmetic means, these have been presented around the estimates rather than standard errors
c Non-smokers with a detectable level of cotinine in their saliva (> 0.1ng/ml).


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Julie.Landsberg@gov.scot