Figures & data
Figure 1. Patient data flow-chart. The ‘Cohort to identify patients with COPD exacerbations’ had 64,609 visits. The ‘Cohort to predict 30-day readmissions’ had 3,372 visits.
Table 1. Demographics of cohort to identify admissions coded as COPD exacerbations.
Table 2. Demographics of cohort to predict 30-day readmissions.
Figure 2. Change in performance of logistic regression models to identify AECOPD with stepwise addition of variables of decreasing importance. No significant change in C-Statistic after addition of fourth variable.
Table 3. Performance of 10-fold cross-validation identification of AECOPD models.
Table 4. LASSO and logistic regression models for identification of AECOPD at 20% and 50% decision thresholds.
Figure 3. Change in performance in the 30-day readmission risk logistic regression models with addition of more variables. No significant change in C-Statistic after addition of the second variable.
Table 5. Performance of 8-fold cross validation 30-day readmission risk models.
Table 6. Comparison of 1-variable logistic regression model and HOSPITAL score risk category for 30-day readmission risk at 20% decision threshold.
Table 7. Characteristics of prediction scores to predict readmissions.