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. 2023 Jul 11;23:256. doi: 10.1186/s12890-023-02550-0

Table 3.

Demographic and clinical characteristics of the study population (n = 17,557)

Characteristic ONS
% of total (n)
unless otherwise stated
Aurum
% of total (n)
unless otherwise stated
HES-APC
% of total (n)
unless otherwise stated
Total cohort 11,295 (100%) 9,948 (100%) 10,714 (100%)
Demographic
 Median (IQR) age in years 77 (10.3) 77 (13) 77 (14)
 ≥ 65 years 90.0% (n = 10,176) 86.2% (n = 8,191) 85.3% (n = 9,145)
 Male 63.0% (n = 7,123) 63.2% (n = 6,011) 60.7% (n = 6,512)
 Smoking history (ever/current) 48.9% (n = 5,529) 66.2%(n = 6,288) 65.6% (n = 7,030)
Comorbidities
 COPD 18.2% (n = 2,060) 19.0% (n = 1,806) 20.9% (n = 2,240)
 Asthma (in past 2 years) 6.93% (n = 784) 10.1% (n = 959) 10.3% (n = 1,111)
 Lung cancer 3.0% (n = 348) 2.1% (n = 206) 2.8% (n = 305)
 Ischemic stroke 13.4%(n = 1,513) 12.0% (n = 1,142) 13.2% (n = 1,418)
 Heart failure 17.9% (n = 2,024) 17.1% (n = 1,629) 17.6% (n = 1,889)
 Ischemic heart disease 13.4% (n = 1,523) 13.6% (n = 1,300) 13.4% (n = 1,441)
 Myocardial infarction 13.1% (n = 1,481) 13.3% (n = 1,267) 13.2% (n = 1,414)
 Gastroesophageal reflux 17.8% (n = 2,012) 17.6% (n = 1,677) 17.6% (n = 1,892)