Figure 1.

Independent predictors of readmission for acute exacerbation of COPD at 1 year. Variables shown are those significant on univariate comparisons between subjects with and without readmission within 1 year of index admission. The following variables were included in the multivariable model: age, race, sex, current smoking status, GERD, depression, anxiety, serum sodium, and tobacco cessation counseling. CI = confidence interval; COPD = chronic obstructive pulmonary disease; GERD = gastroesophageal reflux disease.