Table 3 Stratified analysis of pulmonary function test in male subjects according to general characteristics
N (%) | FEV1p - Mean (Standard error) | FVCp - Mean (Standard error) | FEV1/FVC - (Standard error) | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
Seoul | Jeju | Seoul | Jeju | p-value | Seoul | Jeju | p-value | Seoul | Jeju | p-value | |
Education level | |||||||||||
Low | 89 (22.4) | 3 (5.7) | 88.05 (1.89) | 92.71 (5.93) | 0.632 | 89.95 (1.58) | 96.40 (2.56) | 0.296 | 0.74 (0.011) | 0.75 (0.052) | 0.602 |
High | 251 (77.6) | 36 (94.3) | 90.81 (0.76) | 97.44 (0.67) | < 0.001 | 91.60 (0.72) | 96.37 (1.08) | < 0.001 | 0.81 (0.005) | 0.82 (0.003) | 0.021 |
Household income | |||||||||||
Low | 116 (32.3) | 4 (6.3) | 89.33 (1.17) | 95.59 (1.76) | 0.474 | 90.93 (1.11) | 83.90 (1.49) | 0.357 | 0.78 (0.006) | 0.83 (0.044) | 0.861 |
High | 224 (67.7) | 35 (93.7) | 90.68 (0.91) | 97.38 (0.98) | < 0.001 | 91.42 (0.84) | 97.52 (1.26) | < 0.001 | 0.80 (0.007) | 0.82 (0.006) | 0.100 |
Occupational class | |||||||||||
Blue collar | 118 (33.1) | 8 (22.1) | 88.44 (1.49) | 90.36 (1.83) | 0.689 | 90.86 (1.22) | 90.55 (2.77) | 0.589 | 0.77 (0.010) | 0.80 (0.017) | 0.484 |
White collar | 222 (66.9) | 31 (77.9) | 91.11 (0.79) | 99.01 (1.40) | < 0.001 | 91.45 (0.77) | 97.88 (1.44) | < 0.001 | 0.80 (0.006) | 0.82 (0.003) | 0.002 |
Smoking status | |||||||||||
Smoker | 275 (80.2) | 30 (78.4) | 89.80 (0.89) | 97.95 (1.15) | < 0.001 | 91.22 (0.78) | 96.07 (2.44) | 0.062 | 0.79 (0.005) | 0.83 (0.006) | < 0.001 |
Non-smoker | 65 (19.8) | 9 (21.6) | 91.70 (1.37) | 93.60 (6.10) | 0.901 | 91.38 (1.36) | 97.91 (8.92) | 0.722 | 0.82 (0.013) | 0.76 (0.021) | 0.070 |
Drinking status | |||||||||||
Heavy | 141 (42.4) | 19 (46.0) | 90.60 (1.10) | 99.43 (2.94) | 0.006 | 92.06 (1.11) | 100.88 (3.37) | 0.015 | 0.79 (0.008) | 0.81 (0.023) | 0.279 |
Social | 199 (57.6) | 20 (54.0) | 89.98 (0.90) | 95.70 (1.75) | 0.005 | 90.68 (0.74) | 93.22 (1.66) | 0.166 | 0.80 (0.007) | 0.82 (0.007) | 0.019 |
Age (years) | |||||||||||
Young (19–38) | 75 (28.7) | 7 (25.3) | 93.35 (0.99) | 99.22 (1.56) | 0.993 | 94.24 (0.91) | 98.21 (3.32) | 0.523 | 0.84 (0.007) | 0.85 (0.007) | 0.993 |
Middle (39–58) | 158 (50.4) | 21 (59.3) | 88.36 (1.11) | 96.48 (1.77) | < 0.001 | 90.88 (0.92) | 97.34 (1.12) | < 0.001 | 0.78 (0.006) | 0.81 (0.007) | 0.002 |
Old (> 58) | 107 (20.9) | 11 (15.4) | 89.14 (1.34) | 95.21 (1.12) | 0.001 | 86.88 (1.50) | 89.88 (2.81) | 0.350 | 0.74 (0.010) | 0.78 (0.037) | 0.289 |