Table 3 Results of the negative binomial regression analyses for the risk of losing teeth (n = 1694). Unadjusted and adjusteda relative risks (RR) with 95 % confidence intervals (CI)
Unadjusted RR (95 % CI) | Adjusted RR (95 % CI) | |
|---|---|---|
Gender | ||
Male | 1.16 (1.01–1.34) | 0.96 (0.83–1.11) |
Female (reference) | 1.00 | 1.00 |
Education | ||
Basic | 2.11 (1.56–2.84) | 1.81 (1.34–2.46) |
Secondary | 1.67 (1.45–1.93) | 1.48 (1.27–1.72) |
Higher (reference) | 1.00 | 1.00 |
Tooth brushing | ||
Once daily or less | 1.38 (1.19–1.59) | 1.19 (1.02–1.39) |
At least twice daily (reference) | 1.00 | 1.00 |
Plaque | ||
Yes | 1.06 (0.89–1.26) | 0.97 (0.82–1.15) |
No (reference) | 1.00 | 1.00 |
Diabetes | ||
Yes | 1.50 (0.97–2.33) | 1.40 (0.92–2.15) |
No (reference) | 1.00 | 1.00 |
Smoking | ||
0–10 pack-years | 1.50 (1.06–2.13) | 1.39 (0.99–1.97) |
11–20 pack-years | 1.85 (1.38–2.49) | 1.55 (1.15–2.08) |
21 or more pack-years | 2.18 (1.67–2.85) | 1.78 (1.36–2.33) |
Former smoker | 1.25 (1.06–1.48) | 1.13 (0.96–1.34) |
Occasional smoker | 1.08 (0.83–1.41) | 0.98 (0.75–1.28) |
Never smoker (reference) | 1.00 | 1.00 |
1–20 years of smoking | 1.62 (1.15–2.28) | 1.40 (0.99–1.96) |
21–30 years of smoking | 2.00 (1.57–2.55) | 1.66 (1.29–2.12) |
31 or more years of smoking | 2.00 (1.40–2.86) | 1.72 (1.20–2.45) |
Never smoker (reference) | 1.00 | 1.00 |
Alcohol use, g/wk | ||
Alcohol drinker | 1.25 (1.01–1.55) | 1.09 (0.88–1.36) |
Light drinker (reference) | 1.00 | 1.00 |