Gender | Education | Tooth brushing | ||||
---|---|---|---|---|---|---|
Male | Female | Low | High | Once daily or less | At least twice daily | |
(n = 785) | (n = 909) | (n = 688) | (n = 1006) | (n = 557) | (n = 1137) | |
RR (95 % CI) | RR (95 % CI) | RR (95 % CI) | RR (95 % CI) | RR (95 % CI) | RR (95 % CI) | |
Smoking | ||||||
0–10 pack-years | 1.90 (1.12–3.21) | 1.07 (0.68–1.70) | 1.34 (0.84–2.14) | 1.42 (0.85–2.37) | 1.58 (0.85–2.95) | 1.35 (0.89–2.04) |
11–20 pack-years | 2.27 (1.41–3.65) | 1.20 (0.83–1.74) | 1.65 (1.16–2.35) | 1.35 (0.79–2.30) | 1.97 (1.21–3.23) | 1.31 (0.90–1.91) |
21 or more pack-years | 2.23 (1.52–3.26) | 1.41 (0.96–2.08) | 1.64 (1.20–2.25) | 2.25 (1.35–3.74) | 1.81 (1.21–2.70) | 1.81 (1.25–2.63) |
Former smoker | 1.36 (1.06–1.75) | 0.98 (0.78–1.24) | 1.14 (0.90–1.44) | 1.12 (0.88–1.43) | 1.22 (0.92–1.61) | 1.09 (0.88–1.34) |
Occasional smoker | 1.24 (0.86–1.80) | 0.76 (0.52–1.12) | 0.99 (0.67–1.45) | 1.01 (0.70–1.46) | 0.95 (0.62–1.44) | 1.01 (0.71–1.42) |
Never smoker (reference) | 1.00 | 1.00 | 1.00 | 1.00 | 1.00 | 1.00 |
1–20 years of smoking | 2.00 (1.17–3.42) | 1.07 (0.69–1.65) | 1.47 (0.96–2.24) | 1.28 (0.73–2.25) | 1.60 (0.89–2.88) | 1.32 (0.87–2.00) |
21–30 years of smoking | 2.15 (1.49–3.11) | 1.32 (0.95–1.84) | 1.68 (1.25–2.26) | 1.56 (1.00–2.44) | 1.85 (1.25–2.72) | 1.55 (1.12–2.14) |
31 or more years of smoking | 2.33 (1.40–3.87) | 1.26 (0.76–2.08) | 1.47 (0.95–2.29) | 2.35 (1.31–4.22) | 1.95 (1.13–3.36) | 1.59 (0.98–2.56) |
Never smoker (reference) | 1.00 | 1.00 | 1.00 | 1.00 | 1.00 | 1.00 |