[Retracted] Prediction of the Collapse of Necrotic Femoral Head by CT and X-Ray Examinations before Hip Replacement Based on Intelligent Medical Big Data

Table 1

Calculation methods of diagnostic sensitivity, specificity, and accuracy.

Indicator	Calculation methods
Sensitivity	Patients with actual illness and correct diagnosis/total patients × 100%
Specificity	Actual disease-free and correctly diagnosed patients/total patients × 100%
Accuracy	(Number of patients diagnosed in the affected population + number of patients diagnosed in the nonaffected population)/total patients × 100%