Clinical, physiologic, and radiographic factors contributing to development of hypoxemia in moderate to severe COPD: a cohort study

Table 4 Multivariable logistic associations with the development of hypoxemia in subjects recruited from non-Denver sites

Variable	OR	95% CI	P-value
Baseline oxygen saturation, %	0.77	0.60–0.99	0.04
Congestive heart failure	7.22	1.66–31.3	0.008
Severe AECOPD within 12 months	4.26	1.33–13.6	0.015

This analysis is of the subgroup (n = 546) not recruited at Denver. Variables included in the backwards stepwise logistic regression model: age, race, sex, baseline oxygen saturation, congestive heart failure, FEV₁ percent predicted, PA/A > 1, and severe AECOPD within 12-months of visit
Abbreviations: OR odds ratio, CI confidence interval, BMI body mass index, FEV₁ forced expiratory volume in 1-s, FVC forced vital capacity, PA/A pulmonary artery to aorta ratio, AECOPD acute exacerbation of chronic obstructive pulmonary disease

ISSN: 1471-2466