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Table 1 Profile of the study sample

From: Smoking and tooth discolouration: findings from a national cross-sectional study

Sex

Male

1500 (44.3%)

 

Female

1884 (55.7%)

Age

16–34

957 (28.3%)

 

35–54

1214 (35.9%)

 

55+

1213 (35.8%)

Education

High education

748 (22.1%)

 

Middle education

1304 (38.5%)

 

Lower education

1332 (39.4)

Income

Average or higher than national average

1046 (30.9%)

 

Lower than average

2338 (69.1%)

Smoking

Smoker

817 (24.1%)

 

Non smoker

2567 (75.9%)