Figure 4

Receiver operating characteristic curves for elevation of the hemidiaphragm on chest radiographs. Optimal cut-off value: 29 mm (sensitivity 73.9%, specificity 94.2%) with an area under curve of 0.903 (95% CI 0.829 to 0.977; P < 0.001).
Receiver operating characteristic curves for elevation of the hemidiaphragm on chest radiographs. Optimal cut-off value: 29 mm (sensitivity 73.9%, specificity 94.2%) with an area under curve of 0.903 (95% CI 0.829 to 0.977; P < 0.001).