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. 2019 Sep 3;14:2003–2013. doi: 10.2147/COPD.S210897

Table 1.

Characteristics of patients in the study cohort. Number of patients (and percent of cohort) are reported unless otherwise indicated

Patient-related variables Study cohort (N=176,338)
Female sex (%) 85,507 (48.5%)
Age (SDa) 68.7 (12.5)
Year from COPD Diagnosis 6.1 (4.3)
Death 75,997 (43.1%)
Socioeconomic scale (%)
Quantile 1 46,924 (26.6%)
Quantile 2 37,549 (21.3%)
Quantile 3 32,610 (18.5%)
Quantile 4 29,695 (16.8%)
Quantile 5 25,416 (14.4%)
Unknown 4144 (2.35%)
Rural area 30,153 (17.1%)
Patient-year-related variables
COPD hospitalization 179,912 (15.5%)
COPD-related outpatient visits
 No outpatient visit 566,648 (48.8%)
 ≥1 GP visit 470,329 (40.6%)
 ≥1 Specialist visit 121,798 (10.5%)
Charlson comorbidity score (SD) 1.2 (2.4)
History of asthma diagnosis 180,926 (15.6%)
Pulmonary function test (PFT) 132,047 (11.4%)

Note: aStandard deviation.

Abbreviation: COPD, chronic obstructive pulmonary disease.