Table 1

Baseline demographic patient characteristics and procedures (n=462)

VariableFrequency*
Age (years)
 Mean (SD)74.6 (9.6)
 Median (IQR)75.0 (69.0 to 81.0)
Male gender272 (58.9)
BMI
 n (% non-missing)442 (95.7)
 <18.510 (2.3)
 18.5 to <25137 (31.0)
 25 to <30163 (39.8)
 ≥30132 (29.9)
Smoking status
 n (% non-missing)438 (94.8)
 Current smoker43 (9.8)
 Ex-smoker236 (53.9)
 Never smoked159 (36.3)
Asthma diagnosis†24 (5.2)
COPD diagnosis†19 (4.1)
Respiratory tract cancer0 (0.0)
Other chronic respiratory diseases (excluding cancer)‡4 (0.9)
Lung function test conducted
 90 days prior diagnosis88 (19.0)
 365 days prior diagnosis160 (34.6)
  • *Numbers are presented as n (%) unless specified.

  • †First diagnostic code recorded ever prior and up to diagnosis date.

  • ‡Listed in the online supplementary data.

  • BMI, body mass index; COPD, chronic obstructive pulmonary disease.