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Table 6 Diagnostic performance of the SFTS prediction scoring system

From: Severe fever with thrombocytopenia syndrome: comparison with scrub typhus and clinical diagnostic prediction

SFTS score

Sensitivity (95% CI)

Specificity (95% CI)

Positive likelihood ratio (95% CI)

Negative likelihood ratio (95% CI)

A. SFTS vs. eschar-positive and -negative scrub typhus

 ≥2

0.931 (0.879–0.964)

0.961 (0.938–0.976)

23.905 (14.211–39.547)

0.071 (0.037–0.128)

 3

0.422 (0.376–0.431)

0.996 (0.976–1.000)

97.382 (15.379–1903.086)

0.581 (0.569–0.640)

B. SFTS vs. eschar-negative scrub typhus

 ≥2

0.931 (0.889–0.952)

0.939 (0.850–0.983)

15.212 (5.925–54.850)

0.073 (0.048–0.131)

 3

0.422 (0.382–0.422)

1.000 (0.918–1.000)

NA

0.578 (0.578–0.673)

C. SFTS vs. rash-negative scrub typhus

 ≥2

0.931 (0.890–0.952)

0.903 (0.768–0.972)

9.624 (3.836–34.539)

0.076 (0.049–0.143)

 3

0.422 (0.384–0.422)

1.000 (0.875–1.000)

NA

0.578 (0.578–0.705)

  1. Abbreviations: SFTS severe fever with thrombocytopenia syndrome, CI confidence interval, NA not available