Table 4.

Results of Cox proportional hazards model comparing mortality in COPD patients free from CHF with relative lymphocyte count ≤20%

Variable	Hazard ratio for relative lymphocytes count ≤20% (95% CI)	p-value
Adjusted for age and sex	1.65 (1.04–2.61)	0.034
Adjusted for age, sex, smoking, body mass index, FEV1 (percent of predicted), FVC (percent of predicted), FEV1/FVC (percent), PaO2, PaCO2, pH, ischemic heart disease, history of myocardial infarction, heart rate, systolic and diastolic blood pressure.	1.63 (1.03–2.58)	0.038

COPD chronic obstructive pulmonary disease, CHF congestive heart failure, CI confidence interval, FEV₁ forced expiratory volume in one second, FVC forced vital capacity, FEV₁/FVC Tiffeneau, PaO₂ partial arterial oxygen tension, PaCO₂ partial arterial carbon dioxide tension