Demographic characteristics of the cohort
| Males | Females | |||
| Woodworkers | Reference workers | Woodworkers | Reference workers | |
| Subjects n | 927# | 104# | 185# | 131# |
| Age at baseline yrs | 38.7±11.1 | 40.4±10.0 | 38.3×±9.3 | 37.0±8.7 |
| Height cm | 178.8±7.1 | 178.6±7.5 | 166.4±6.0 | 167.2±5.4 |
| Weight kg | 83.3±13.6 | 85.1±14.2 | 69.8±13.1 | 67.8±10.5 |
| Weight gain kg | 2.4±6.2 | 2.1±7.8 | 2.1±7.0 | 2.6±7.0 |
| Smokers¶ | 429 (46.5) | 55 (52.9) | 96 (52.5) | 72 (55.4) |
| Smoking history | ||||
| <7 pack-yrs+ | 211 (22.8) | 25 (24.0) | 52 (28.4) | 34 (26.2) |
| ≥7 pack-yrs+ | 159 (17.2) | 22 (21.2) | 30 (16.4) | 31 (23.9) |
| Follow-up time yrs | 6.33±0.60 | 6.27±0.35 | 6.34±0.60 | 6.30±0.30 |
| FEV1 % pred at baseline | 97.6±12.2 | 98.4±13.1 | 100.2±13.6 | 100.7±12.5 |
| FEV1/FVC % <70% at baseline | 57 (6.2) | 4 (3.9) | 7 (3.8) | 6 (131) |
| Daily coughing at baseline | 279 (31.3) | 33 (33.7) | 52 (30.2) | 29 (23.0) |
| Chronic bronchitis at baseline | 89 (11.1) | 9 (10.5) | 8 (5.1) | 8 (7.1) |
| Self-reported asthma at baseline | 40 (4.1) | 3 (3.0) | 9 (5.0) | 8 (6.3) |
| Atopy at follow-upƒ | 149 (21.1) | 20 (28.6) | 20 (14.4) | 19 (18.3) |
Data are presented as mean±sd or n (%), unless otherwise stated. FEV1: forced expiratory volume in one second; % pred: % predicted; FVC: forced vital capacity. #: valid cases vary between variables; ¶: smokers are current smokers and ex-smokers who stopped smoking <2 yrs prior to baseline; +: pack-yrs smoking during follow-up calculated as pack-yrs at follow-up minus pack-yrs at baseline; ƒ: Phadiatop® was tested on a total of 1,017 participants.