Table III. Diagnostic score (DS) for the non-specific abdominal pain (NSAP) model. The DS model is shown at six different cut-off levels of symptoms, signs and tests. Cut-off levels: DS I=0.48, DS II=0.50, DS III=0.53, DS IV=0.54, DS V=0.55 and DS VI=0.58.

FN: False negative; FP: false positive; TN: true negative; TP; true positive. *DS: 0.22 × Gender (female=1, male=0) - 0.02 × Age (years) - 0.47 × Location of initial pain (PE=1, NE=0) + 0.53 × Location of pain at diagnosis (PE=1, NE=0) + 0.45 × Progression of pain (PE=1, NE=0) + 0.29 × Relieving factors (PE=1, NE=0) - 0.38 × Previous similar pain (PE=1, NE=0) + 0.70 × Vertigo (PE=1, NE=0) + 1.63 × Jaundice (PE=1, NE=0) + 0.47 × Mood (PE=1, NE=0) + 0.99 x Distension (PE=1, NE=0) + 2.34 × Mass (PE=1, NE=0) + 0.55 × Rebound (PE=1, NE=0) + 0.76 × Guarding (PE=1, NE=0) + 2.90 × Rigidity (PE=1, NE=0) + 1.49 × Murphy (PE=1, NE=0) + 0.59 × Bowel sounds (PE=1, NE=0) + 1.02 × Leucocyte count (PE=1, NE=0) + 3.36 × Urine (PE=1, NE=0) – 13.77. PE: Positive endpoint; NE: negative endpoint.