Table 1.
Demographics and baseline characteristics
| Male (N = 107) | Female (N = 32) | Total (N = 139) | t Test (df = 137) | ||||
|---|---|---|---|---|---|---|---|
| Mean | SD | Mean | Mean | SD | |||
| Age | 64.91 | 8.15 | 63.65 | 7.74 | 64.62 | 8.05 | P > 0.05 |
| Education (years) | 10.59 | 4.05 | 11.9 | 4.027 | 10.89 | 4.07 | P > 0.05 |
| FEV1% of predicted | 41.45 | 20.23 | 52.17 | 23.26 | 43.48 | 21.15 | P = 0.05 |
Severity as per Global Initiative for Chronic Obstructive Lung Disease (GOLD) diagnostic criteria: mild/moderate/severe/very severe 10/19/47/35.
FEV1% = forced expiratory volume in 1 second (FEV1)/forced vital capacity (FVC) ratio.