The net reclassification improvement (NRI) amongst 200 patients
| Clinician's estimates of the probability of pneumonia after LDCT | Net reclassification | |||
| Excluded/ low | Intermediate/ high/certain | Total | ||
| Patients with pneumonia according to the adjudication committee (n=143) | ||||
| Clinician's estimates of the probability of pneumonia before LDCT | Net reclassification=6–18 = –12 patients (–8.4% of the 143 patients with pneumonia) | |||
| Excluded/low | 2 | 6 | ||
| Intermediate/high/certain | 18 | 117 | ||
| Total | 143 | |||
| Patients without pneumonia according to the adjudication committee (n=57) | ||||
| Clinician's estimates of the probability of pneumonia before LDCT | Net reclassification=29–1 = +28 patients (+49.1% of the 57 patients without pneumonia) | |||
| Excluded/low | 8 | 1 | ||
| Intermediate/high/certain | 29 | 19 | ||
| Total | 57 | |||
| Total patients | 200 | Absolute NRI=28–12 = +16 patients (8.0% of all 200 patients) | ||
The values in bold show patients correctly reclassified by the new model, while the values in italic show patients incorrectly reclassified by the new model. The absolute number of patients correctly reclassified is –12 patients among those with pneumonia and +28 patients among those without pneumonia. Overall, the absolute number of patients correctly reclassified is thus +16 patients, which corresponds to 8.0% of all patients in the sample. LDCT: low-dose computed tomography.