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Table 3 Comorbidities and Spirometry per Quintile

From: Disproportionate utilization of healthcare resources among veterans with COPD: a retrospective analysis of factors associated with COPD healthcare cost

  1st Quintile 2nd Quintile 3rd Quintile 4th Quintile 5th Quintile
Comorbidity      
  Depression 38 (12%) 47 (37%) 38 (31%) 40 (31%) 41 (32%)
  Diabetes 31 (10%) 30 (24%) 34 (26%) 49 (38%) 36 (28%)
  Coronary artery      
  Disease 37 (12%) 58 (46%) 48 (37%) 53 (41%) 43 ( 33%)
  Hypertension 95 (30%) 108 (85%) 99 (76%) 108 (83%) 116 (90%)
  Heart failure 9 (3%) 8 (6%) 5 (4%) 15 (12%) 8 (6%)
  COPD  >5 years 81 (25%) 58 (46%) 33 (25%) 45 (35%) 43 (33%)
Spirometry      
  FEV1 (L) 1.56 ± 0.70 1.93 ± 0.88 2.14 ± 0.76 1.98 ± 0.70 2.25 ± 0.78
  FEV1% predicted 50.0 ± 20.2% 60.2 ± 22.7% 64.3 ± 19.1% 61.8 ± 18.2% 67.0 ± 20.5%
  FVC (L) 3.04 ± 0.94 3.34 ± 1.07 3.43 ± 0.94 3.14 ± 0.91 3.58 ± 0.93
  FVC% predicted 77.7 ± 22.4% 83.8 ± 23.0% 82.6 ± 19.5% 79.1 ± 17.4% 85.5 ± 18.1%
  FEV1/FVC 50.9 ± 14.4% 56.9 ± 13.5% 62.1 ± 12.2% 62.3 ± 12.3% 62.0 ± 11.9%
  1. Comorbidites are presented as n, percentage of the quintile; Spirometry is presented as mean ± standard deviation.