| Subjects | Subjects with COPD | Partially adjusted# OR | Fully adjusted¶ OR | |
| Males | ||||
| Prudent diet score | ||||
| 1 (lowest fifth) | 470 | 144 (30.6) | ||
| 2 | 359 | 72 (20.1) | 0.67 (0.48–0.95) | 0.54 (0.36–0.82) |
| 3 (middle fifth) | 265 | 45 (17.0) | 0.61 (0.41–0.91) | 0.61 (0.38–0.97) |
| 4 | 258 | 45 (17.4) | 0.57 (0.38–0.84) | 0.62 (0.38–1.00) |
| 5 (highest fifth) | 196 | 28 (14.3) | 0.49 (0.31–0.78) | 0.46 (0.26–0.81) |
| Fifths of prudent diet score as a trend | 0.84 (0.76–0.92) p<0.001 | 0.86 (0.76–0.97) p = 0.012 | ||
| Females | ||||
| Prudent diet score | ||||
| 1 (lowest fifth) | 118 | 24 (20.3) | ||
| 2 | 227 | 40 (17.6) | 0.93 (0.51–1.69) | 1.28 (0.64–2.56) |
| 3 (middle fifth) | 322 | 50 (15.5) | 0.92 (0.52–1.65) | 1.43 (0.72–2.85) |
| 4 | 330 | 35 (10.6) | 0.70 (0.38–1.30) | 1.11 (0.54–2.28) |
| 5 (highest fifth) | 391 | 38 (9.7) | 0.62 (0.34–1.13) | 0.95 (0.47–1.94) |
| Fifths of prudent diet score as a trend | 0.88 (0.77–1.00) p = 0.043 | 0.95 (0.82–1.09) p = 0.445 |
Data are presented as n, n (%) or OR (95% CI), unless otherwise stated. #: for age, height, smoking status and pack-years; ¶: for age, height, smoking status, pack-years, smoke in home, age left education, home ownership status, number of rooms, number of cars, social class, fat mass, activity score, energy intake, alcohol, dietary supplement use, birth weight, father's social class at birth, inhaled or oral steroids use, paracetamol use.