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Table 4 Operational characteristics of studied criteria for the diagnosis of pneumonia

From: Bronchoalveolar lavage cytological alveolar damage in patients with severe pneumonia

Criterion All patients Patients with hospital-acquired pneumonia
  Se Sp PPV NPV Se Sp PPV NPV
Presence of type II pneumocytes 0.444 0.833 0.889 0.333 0.462 0.833 0.857 0.417
Presence of erythrophagocytes 0.370 1.000 1.000 0.346 0.333 1.000 1.000 0.409
Both criteria 0.222 1.000 1.000 0.300 0.205 1.000 1.000 0.367
  1. NPV, negative predictive value; PPV, positive predictive value; Se, sensitivity; Sp, specificity.