Table 1 Characteristics of the study participants
From: Discordance in Spirometric Interpretations Based on Korean and Non-Korean Reference Equations
n (%) | mean ± SD | |
|---|---|---|
Age (years) | 44.5 ± 10.7 | |
20-39 | 299 (36.2) | |
40-49 | 232 (28.1) | |
≥ 50 | 294 (35.6) | |
Smoking History | ||
Current smoker | 513 (62.2) | 15.8 ± 7.5* |
Non-current smoker | 288 (34.9) | |
Height (cm) | 169.9 ± 5.7 | |
Weight (kg) | 68.3 ± 9.2 | |
Chest X-ray | ||
Normal | 732 (88.7) | |
Abnormal | 93 (11.3) | |
FEV1 (ℓ) | 3.6 ± 0.6 | |
Difference† (95% CI) | 0.14 (0.05-0.23) | |
FVC (ℓ) | 4.6 ± 0.7 | |
Difference† (95% CI) | 0.16 (0.06-0.26) | |
FEV1/FVC (%) | ||
≥70 | 704 (85.3) | |
<70 | 121 (14.7) |