Table 6. Spirometry results.
| Group | Year | Day | n | FVC (% predicted) | FEV1 (% predicted) |
|---|---|---|---|---|---|
| Reference value | >80 | >80 | |||
| Control | 1 | Mon. | 0 | - | - |
| 2 | Mon. | 8 | 95 (87–110) | 96 (80–115) | |
| Fri. | 7 | 88 (80–96) | 88 (82–97) | ||
| AM-operators | 1 | Mon. | 0 | - | - |
| Fri. | 6 | 81 (66–94) | 80 (68–97) ¤ † | ||
| 2 | Mon. | 12 | 92 (78–107) | 93 (75–109) | |
| Fri. | 9 | 92 (82–105) | 92 (80–106) ¤ | ||
| Welders | 1 | Mon. | 0 | - | - |
| Fri. | 8 | 92 (85–106) | 94 (82–113) † | ||
AM–additive manufacturing; FVC–forced vital capacity, FEV1 –forced expiratory volume in 1 second.
Values ae the geometric mean (min-max) of the expected value for the individual based on age, gender and height with the reference material Hedenström.
¤ < 0.05, Year 2 vs Year 1 same day and group.
† = p<0.05 Welders vs AM same year and day.