Parameters | Group 1 (total group) (n=1084) | Group 2 (exclusions) (n=565) | Group 3 (met criteria) (n=519) | Group 4 (usable) (n=989) |
---|---|---|---|---|
BMI* | 31.4 (5.4)† | 31.2 (5.2)† | 31.6 (5.6)† | 31.4 (5.4)† |
<18.5 | 0.2 | 0.2 | 0.2 | 0.2 |
18.5–25 | 8.0 | 7.6 | 8.6 | 8.2 |
25–29.9 | 37.6 | 39.6 | 35.5 | 37.5 |
30–34.9 | 32.6 | 31.3 | 33.4 | 32.4 |
35–39.9 | 13.7 | 14.0 | 13.9 | 14.0 |
≥40 | 7.9 | 7.3 | 8.4 | 7.7 |
Age | 59.7 (10.8)† | 62.2 (9.9)† | 57.0 (11.1)† | 59.2 (10.7)† |
<50 | 16.5 | 9.6 | 22.9 | 17.3 |
50–64 | 49.2 | 46.9 | 51.2 | 50.1 |
65–79 | 31.4 | 40.5 | 22.9 | 29.9 |
>79 | 2.9 | 3.0 | 3.1 | 2.7 |
Smoking | ||||
Never | 38.0 | 27.5 | 48.4 | 37.8 |
Current | 12.0 | 14.9 | 9.2 | 12.5 |
Former | 50.0 | 57.6 | 42.4 | 49.7 |
Gender | ||||
Female | 9.3 | 4.4 | 14.6 | 9.9 |
Male | 90.7 | 95.6 | 85.4 | 90.1 |
All values were percentage distributions of each parameter within the population groups.
Group 1—all workers surveyed without consideration for exclusion based on ATS/ERS test criteria for spirometry.
Group 2—all workers who did not meet all ATS/ERS criteria for spirometric assessment.
Group 3—workers who met all ATS/ERS criteria for spirometric assessment.
Group 4—All workers with spirometry quality ≥“B” (see Methods section) and repeatable tests not meeting end-of-test (EOT) criteria.
*BMI—weight in kilograms/height in metres squared (kg/m2).
†These represented the mean and SDs (in parenthesis) for these groups.
ATS/ERS, American Thoracic Society and European Respiratory Society; BMI, body mass index.