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Table 3 Diagnostic accuracy values with 95% confidence intervals using the same cut-off value for two sets of horses: A: all horses ( n =102); B: horses 7 months or older ( n =86)

From: SvSXP: a Strongylus vulgaris antigen with potential for prepatent diagnosis

Data set: A B
Cut-off value (PP) 8.75 13.47
Se 73.3% (60.3 – 83.9%) 65.5% (51.9 – 77.5%)
Sp 81.0% (65.9 – 91.4%) 82.1% (63.1 – 93.9%)
DOR 11.69 (4.48 – 30.5) 8.74 (2.89 – 26.48)
LR+ 3.85 (2.03 – 7.32) 3.67 (1.62 – 8.30)
LR- 0.33 (0.21 – 0.51) 0.42 (0.28 – 0.62)
  1. Cut-off values represent optimal sensitivity and specificity for each case-definition. PP: percent of a positive control; Se: sensitivity; Sp: specificity; DOR: diagnostic odds ratio; LR+: positive likelihood ratio; LR-: negative likelihood ratio. The 95% confidence intervals are given in parentheses.