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Table 3 Demographic characteristics of COPD patients in the two phases. Data are shown as N (%) of cases or mean +/- standard deviation

From: Chronic Obstructive Pulmonary Disease (COPD) management in the community: how could primary care team contribute?

  Phase 1 Phase 2 P value
COPD cases included in data analysis (n) 2358 2177 /
Gender    0.80
 Male 1981 (84.0%) 1835 (84.3%)  
 Female 377 (16.0%) 342 (15.7%)  
Age (years) 75.9 ± 10.6 75.8 ± 10.7 0.82
 < 65 years old 368 (15.6%) 339 (15.6%) 0.97
 ≥65 years old 1990 (84.4%) 1838 (84.4%)  
Smoker 658 (27.9%) 661 (30.4%) 0.07
Body Mass Index (BMI, kg/m2) 23.1 ± 4.0 23.4 ± 4.1 0.76
 Underweight (BMI < 18.5) 314 (13.3%) 263 (12.1%) 0.06
 Normal (BMI 18.5–22.9) 915 (38.8%) 797 (36.6%)  
 Overweight (BMI 23.0–24.9) 405 (17.2%) 433 (19.9%)  
 Obesity (BMI > 25) 724 (30.7%) 684 (31.4%)