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Pulmonary abnormalities of the participants
| Interpretation of spirometric results |
Tricyclists n (%) | Control n (%) |
|---|---|---|
| Restrictive pattern | 127 (84.6) | 48 (22.9) |
| Obstructive pattern | 21 (14.0) | 12 (5.7) |
| Normal | 2 (1.3) | 0 (0) |
Restrictive – decrease in FVC with decrease in FEV1/FVC% less than 85%; decrease in FVC with no decrease in FEV1/FVC% (ie it remains above 85%)28
