From: Absence of association between SERPINE2genetic polymorphisms and chronic obstructive pulmonary disease in Han Chinese: a case-control cohort study
Cases
Controls
Subjects (n)
327
349
Male (%)
80.1
71.9
Age
71.4 ± 9.1 *
67.0 ± 9.8 #
Smoking (pack-yrs)
30.2 ± 6.7
29.2 ± 6.9
FEV1/FVC
45.3 ± 15.6
86.4 ± 5.8
FEV1 % pred
54.9 ± 18.9
94.9 ± 8.7
FEV1 > 50% pred
170
0
FEV1 ≤ 50% pred
157