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NURSE: IF YOU HAVE NOT ALREADY DONE SO, ASK RESPONDENT FOR A SALIVA SAMPLE.
READ OUT: I would like to take a sample of saliva (spit). This simply involves dribbling saliva down a straw into a tube/keeping a dental roll in your mouth for a few minutes. The sample will be analysed for cotinine, which is related to the intake of tobacco smoke and is of particular interest to see if non-smokers may have raised levels as a result of 'passive' smoking.
Universe
Adults (aged 16 and over) and children (aged 2-15 years) living in private households in England in the year 2001.;National
Sampling
Multi-stage stratified random sample
Study Type
Repeated cross-sectional study. The survey is conducted annually.