Table 1

Distribution of cotinine concentrations measured in first saliva samples

Number of subjects
Hospitality workers
Cotinine concentration (ng/g)Smoking permittedSmokefree workplaceGovernment employeesAll workers in smokefree workplaces
*0.2 ng/g.
†Two hospitality workers (cotinine concentrations 9.7 and 23 ng/g) and one government worker (15 ng/g) were excluded from the subsequent statistical analysis (see text for justification).
Below detection limit*12 (35%)6 (60%)40 (78%)46 (75%)
0.2 to <13 (9%)3 (30%)9 (18%)12 (20%)
1 to <210 (29%)1 (10%)1 (2%)2 (3%)
2 to <56 (18%)000
≥5†3 (9%)01 (2%)1 (2%)
All subjects34 (100%)10 (100%)51 (100%)61 (100%)