Table 4.
Age stratified analysis of association between tooth loss1 and metabolic abnormality, smoking, and gender.
| Independent variables | Age ≤ 35 (n = 3086) |
P value | Age > 35 (n = 4807) |
P value |
|---|---|---|---|---|
| OR (95% CI)2 | OR (95% CI) | |||
| Metabolic abnormality3 | ||||
| Yes | 1.57 (0.67–3.68) | 0.29 | 1.29 (1.07–1.59) | 0.009 |
| No (ref)4 | 1.00 | 1.00 | ||
| Smoking habit | ||||
| Former smoking | 3.43 (1.85–5.0) | 0.02 | 1.49 (1.05–2.05) | 0.02 |
| Current smoking | 4 (1.28–6.74) | <0.0001 | 5.29 (4.00–6.66) | <0.0001 |
| Nonsmoking (ref) | 1.00 | 1.00 | ||
| Sex | ||||
| Male | 2.8 (1.43–4.16) | 0.002 | 1.9 (1.5–2.33) | <0.0001 |
| Female (ref) | 1.00 | 1.00 |
1A binary variable was created for tooth loss: (i) 0–5 lost teeth and (ii) ≥6 lost teeth.
2OR: odd ratio and 95% CI: 95% confidence interval have been obtained from binary logistic regression; the category of 0–5 lost teeth was considered as the reference category.
3“Metabolic abnormality” was considered to be present when a subject's body mass index was ≥30 or he/she reported to have at least one of the following: diabetes mellitus, hypertension, or hyperlipidemia.
4Ref: reference category.