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 |