Table 2 Prevalence of tooth discolouration in smokers and non-smokers
From: Smoking and tooth discolouration: findings from a national cross-sectional study
Tooth discolouration | Non-smokers N (%) | Smokers N (%) |
|---|---|---|
Normal | 1236 (51.8%) | 379 (45.8%) |
Mild | 774 (32.4%) | 224 (27.1%) |
Moderate | 275 (11.5%) | 149 (18.0%) |
Severe | 102 (4.3%) | 76 (9.2%) |