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Table 1 Subject characteristics – Occupational medical evaluation group

From: A retrospective study of two populations to test a simple rule for spirometry

  Normal (n = 532) Obstructed (n = 815) Restricted (n = 701) Significance
FEV1 % predicted [mean (SD)] 94.3 (8.8) 53.6 (16.3) 70.7 (11.6) P < 0.001
FVC % predicted [mean (SD)] 92.4 (8.5) 70.4 (15.7) 67.7 (10.5) P < 0.001
FEV1/FVC [mean (SD)] 77.0 (4.4) 56.3 (10.6) 78.3 (5.5) P < 0.001
Gender [n (%) Male] 513 (99.4) 795 (97.6) 674 (96.2) 0.1646
Current smoker [n (%)] 129 (24.3) 269 (33.0) 189 (27.0) P < 0.001
Obesity [n (%)] 191 (35.9) 211 (25.9) 339 (48.4) P < 0.001
BMI [mean (SD)] 29.3 (4.4) 27.9 (5.0) 30.5 (5.1) P < 0.001
Age [mean (SD)] 62.0 (9.1) 65.8 (8.5) 64.2 (9.2) P < 0.001
Pack years [mean (SD)] 46.0 (24.9) 58.8 (30.7) 51.9 (27.8) P < 0.001