Table 4.

Sensitivity, specificity, positive predictive value (PPV) and negative predictive value (NPV) of the real-time reverse transcriptase polymerase chain reaction (real-time RT-PCR) in peripheral blood mononuclear cells (PBMCs), serum and cell-free body cavity effusion to diagnose feline infectious peritonitis (FIP) and the prevalence of FIP

	Real-time RT-PCR PBMCs	Real-time RT-PCR serum	Real-time RT-PCR cell-free body cavity effusion
Sensitivity	28.6 (11.3–52.2)	15.4 (4.4–34.9)	88.9 (73.9–96.9)
Specificity	100.0 (79.4–100.0)	100.0 (86.3–100.0)	100.0 (89.4–100.0)
PPV	100.0 (54.1–100.0)	100.0 (39.8–100.0)	100.0 (89.1–100.0)
NPV	51.6 (33.1–69.9)	53.2 (38.1–67.9)	89.2 (87.2–97.0)
Prevalence (%)	56.8	51.0	52.2

Data are % (95% confidence interval) unless otherwise indicated