Factor | Low (n) | High (n) | Crude OR (95% CI) | Adjusted*OR (95% CI) | βi (95% CI) | Adjusted* βi (95% CI) |
---|---|---|---|---|---|---|
Age (years) | ||||||
 ≤50 | 59 | 103 | 1.00 | 1.00 | Baseline | Baseline |
 >50 – ≤55 | 53 | 111 | 1.20 (0.76–1.90) | 1.18 (0.73–1.92) | 4.13 (–1.78 to 10.0) | 4.10 (–1.73 to 9.94) |
 >55 – ≤60 | 49 | 92 | 1.08 (0.67–1.72) | 0.99 (0.60–1.64) | 3.31 (–2.83 to 9.46) | 2.25 (–3.84 to 8.33) |
 >60 – ≤65 | 42 | 104 | 1.42 (0.88–2.29) | 1.49 (0.89–2.49) | 4.12 (–1.97 to 10.2) | 5.05 (–1.02 to 11.1) |
 >65 | 31 | 83 | 1.53 (0.91–2.59) | 1.44 (0.84–2.48) | 9.14 (2.61 to 15.7) | 8.03 (1.73 to 14.3) |
BMI (kg/m2) | ||||||
 <20 | 12 | 29 | 0.80 (0.45–1.86) | 0.97 (0.46–2.04) | 1.12 (–3.25 to 5.50) | 1.47 (–2.73 to 5.68) |
 ≥20– <25 | 92 | 244 | 1.00 | 1.00 | Baseline | Baseline |
 ≥25– <30 | 82 | 177 | 0.26 (0.57–1.16) | 0.79 (0.55–1.14) | −1.55 (–3.74 to 0.63) | −1.73 (–3.84 to 0.39) |
 ≥30 | 48 | 43 | 0.34 (0.21–0.54) | 0.31 (0.19–0.52) | −6.84 (–9.97 to –3.72) | −6.98 (–10.0 to –3.94) |
Oral contraception | ||||||
 No | 126 | 240 | 1.00 | 1.00 | Baseline | Baseline |
 Yes | 108 | 253 | 1.23 (0.90–1.68) | 1.49 (1.04–2.13) | 2.84 (–1.13 to 6.80) | 5.40 (1.17 to 9.62) |
Menopausal status | ||||||
 Pre | 67 | 120 | 1.00 | 1.00 | Baseline | Baseline |
 Peri/post | 167 | 373 | 1.25 (0.88–1.77) | 1.22 (0.70–2.12) | 4.42 (–0.12 to 8.95) | 3.62 (–3.10 to 10.3) |
MHT** (n = 537) | ||||||
 No | 135 | 287 | 1.00 | 1.00 | Baseline | Baseline |
 Yes | 30 | 85 | 1.33 (0.84–2.12) | 1.37 (0.85–2.23) | −1.52 (–4.53 to 1.48) | −1.55 (–4.50 to 1.40) |
Smoking status | ||||||
 Never | 97 | 209 | 1.00 | 1.00 | Baseline | Baseline |
 Ex | 66 | 135 | 0.95 (0.65–1.39) | 1.06 (0.71–1.58) | −0.58 (–5.44 to 4.28) | 0.85 (–3.91 to 5.62) |
 Current | 71 | 149 | 0.97 (0.67–1.41) | 1.03 (0.70–1.52) | 1.81 (–2.93 to 6.54) | 2.42 (–2.18 to 7.03) |
Alcohol consumption | ||||||
 Zero | 25 | 32 | 1.00 | 1.00 | Baseline | Baseline |
 <15 g/day | 311 | 315 | 1.73 (0.99–3.03) | 1.92 (1.07–3.45) | 8.60 (1.10 to 16.1) | 9.31 (2.05 to 16.6) |
 15 – 30 g/day | 30 | 70 | 1.82 (0.93–3.58) | 2.16 (1.06–4.41) | 9.20 (0.34 to 18.1) | 10.7 (2.03 to 19.3) |
 >30 g/day | 8 | 12 | 1.17 (0.42–3.30) | 1.44 (0.48–4.33) | 2.38 (–11.5 to 16.3) | 4.51 (–9.01 to 18.0) |
 Infrequent | 29 | 64 | 1.72 (0.87–3.41) | 2.01 (0.99–4.08) | 9.41 (0.42 to 18.4) | 10.9 (2.21 to 19.5) |
Baseline season | ||||||
 Spring | 95 | 104 | 1.00 | 1.00 | Baseline | Baseline |
 Summer | 39 | 164 | 3.84 (2.46–6.00) | 3.89 (2.48–6.12) | 20.3 (15.2 to 25.5) | 20.1 (14.9 to 25.2) |
 Autumn | 39 | 110 | 2.58 (1.63–4.08) | 2.52 (1.59–4.00) | 11.0 (5.45 to 16.6) | 10.5 (4.94 to 16.1) |
 Winter  | 61 | 115 | 1.72 (1.14–2.61) | 1.71 (1.12–2.60) | 7.04 (1.72 to 12.4) | 6.80 (1.47 to 12.1) |
Education | ||||||
 O–level college | 158 | 338 | 1.00 | 1.00 | Baseline | Baseline |
 A–level college | 23 | 34 | 0.69 (0.39–1.21) | 0.70 (0.39–1.27) | −5.87 (–13.3 to 1.61) | −5.63 (–12.9 to 1.62) |
 University  | 53 | 121 | 1.07 (0.73–1.55) | 1.17 (0.78–1.74) | −2.31 (–7.02 to 2.40) | −1.10 (–5.77 to 3.57) |
Socio–economic index | ||||||
 Manual | 93 | 181 | 1.00 | 1.00 | Baseline | Baseline |
 Non–manual | 120 | 276 | 1.18 (0.85–1.64) | 1.24 (0.88–1.75) | −0.37 (–4.57 to 3.83) | 0.20 (–3.87 to 4.27) |
 Employer | 20 | 36 | 0.93 (0.51–1.69) | 0.88 (0.47–1.65) | −4.91 (–12.7 to 2.94) | −4.97 (–12.6 to 2.62) |
Born in Sweden | ||||||
 Yes | 200 | 457 | 1.00 | 1.00 | Baseline | Baseline |
 No | 34 | 36 | 0.46 (0.28–0.76) | 0.44 (0.26–0.74) | −10.6 (–17.3 to –3.96) | −10.5 (–16.9 to –4.08) |