Table 3

Percentage of self reported non-smokers (had not smoked in the past month) having serum cotinine higher than 10 ng/ml by sociodemographic groups

2 test between the groups.
SexNS*
    Men4.6
    Women3.4
AgeNS
    25–343.2
    35–444.3
    45–543.4
    55–644.5
AreaNS
    North Karelia4.1
    Kuopio province3.3
    South western Finland4.2
    Helsinki capital area4.0
Marital statusNS
    Married3.8
    Single3.5
    Divorced5.1
    Widow4.1
EducationNS
    Basic education3.9
    Vocational school3.7
    Medium level4.0
    Academic level3.9