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Table 7 Determinants of the upper quarter most costly COPD patients.

From: Determinants of elevated healthcare utilization in patients with COPD

  Bivariate analysis
(n = 389)
Multivariate analysis*
(n = 388)
  OR 95% CI P value OR 95% CI P value
Age (year +1) 1.03 1.0 - 1.1 0.001 NI
FEV1% 0.99 0.97 - 1.0 0.07 0.99 0.97 - 1.01 0.25
BMI (+1 Kg/m2) 1.01 1.0 - 1.1 0.50 0.98 0.93 - 1.04 0.54
Age adjusted CCI 1.27 1.2 - 1.4 <0.001 1.09 1.01 - 1.19 0.04
Myocardial infarct 5.96 3.6 - 9.9 <0.001 2.87 1.5 - 5.5 0.001
Congestive heart failure 6.81 4.1 - 11.4 <0.001 3.52 1.9 - 6.4 <0.001
Mild liver disease 3.14 1.1 - 8.6 0.03 3.83 1.3 - 11.2 0.02
Diabetes mellitus 3.10 1.9 - 5.0 <0.001 2.02 1.1 - 3.6 0.02
  1. Abbreviations: FEV1- forced expired volume in one second (as percent predicted), BMI- body mass index, CCI- Charlson Comorbidity Index, NI- not included (due to insignificance).
  2. * Area under ROC curve equals 0.82.