From: Smoking and tooth discolouration: findings from a national cross-sectional study
 | Satisfied N (%) | Dissatisfied N (%) | Neither Satisfied nor dissatisfied N (%) |
---|---|---|---|
Smokers | 464 (56.1%) | 250 (30.2%) | 113 (13.7%) |
Non-smoker | 1678 (70.7%) | 366 (15.3%) | 334 (14.0%) |