Variable | Area under the curve (95% CI) | Interobserver agreement ICC (95% CI)* |
---|---|---|
CXR measurement | ||
Heart (maximum single measurement), cm | 0.827 (0.760–0.894) | 0.985 (0.958–0.993) |
Heart (right plus left), cm | 0.816 (0.747–0.885) | 0.941 (0.899–0.966) |
CTR | ||
Single heart measurement/maximum chest | 0.788 (0.715–0.861) | 0.986 (0.972–0.993) |
Single heart measurement/chest at diaphragm | 0.762 (0.684–0.841) | 0.985 (0.966–0.992) |
Single heart measurement/chest at mid heart | 0.764 (0.686–0.842) | 0.966 (0.548–0.990) |
Right plus left heart/maximum chest | 0.779 (0.704–0.854) | 0.939 (0.900–0.965) |
Right plus left heart/chest at diaphragm | 0.757 (0.677–0.836) | 0.940 (0.898–0.966) |
Right plus left heart/chest at mid heart | 0.757 (0.678–0.837) | 0.937 (0.892–0.963) |
Note: CI = confidence interval, CTR = cardiothoracic ratio, CXR = chest radiography, ICC = intraclass correlation coefficient.
↵* We calculated ICC only for a subset of 50 patients.