These variables were used in the binary logistic regression analysis, which showed that CD4 counts of <392 cells/μL (aOR27.432, CI 2.018, 372.960), cor pulmonale (aOR16.702, CI 1.864, 149.673), and age (aOR1.111, CI 1.007, 1.227) were independent risk factors for 6-month re-admission (Table 4). Here, CD4 is linked to cor pulmonale.