Table 1

Characteristics of the subgroups of patients with (current study population) and without COPD at entry date to the cohort

CharacteristicsCOPD
(N=14 350)
No COPD
(N=150 416)
Age, mean (SD)54.70 (9.59)38.15 (12.31)
Female sex7377 (51.41)75 826 (50.41)
Socioeconomic status*, mean (SD)3.25 (1.35)3.09 (1.35)
Diabetes1508 (10.51)8647 (5.75)
Peptic ulcer disease1078 (7.51)3635 (2.42)
Renal disease1227 (8.55)5018 (3.34)
Rheumatological disease888 (6.19)3278 (2.18)
Cancer1249 (8.70)4670 (3.10)
Alcohol misuse1431 (9.97)10 535 (7.00)
Prior ischaemic heart disease2018 (14.06)6046 (4.02)
Prior stroke1073 (7.48)3353 (2.23)
Prior heart failure388 (2.70)671 (0.45)
Prior peripheral vascular disease531 (3.70)1277 (0.85)
Prior arrhythmia742 (5.17)2337 (1.55)
Prior depression5545 (38.65)53 167 (35.35)
Prior self-harm1563 (10.89)15 711 (10.45)
  • Data are presented as N (percentage within drug group) unless stated otherwise.

  • *Townsend Index: 1 (lowest) to 5 (highest level of deprivation).24