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Methods:
A retrospective chart review was conducted on 156 patients with suspected acute PE who underwent CTPA and D-dimer testing at a tertiary care center. Sensitivity, specificity, positive predictive value (PPV), negative predictive value (NPV), and likelihood ratios (LR) were calculated for both tests. Prognostic value was assessed by 30-day mortality rates and length of hospital stay.
1. How many patients were included in the study?
2. Which diagnostic tests were performed on the patients?
3. What parameters were calculated to evaluate the tests' performance?
4. How was the prognostic value assessed in the study?