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Table 4 Diagnostic accuracy indices of patient characteristics associated with an adverse outcome in patients presenting with BAT

From: Should we perform a FAST exam in haemodynamically stable patients presenting after blunt abdominal injury: a retrospective cohort study

  Cut-off value Sens (95% CI) Spec (95% CI) LR (+) LR (-)
ISS-score >25 78 (40–96)% 76 (72–80%) 3.3 (2.2–4.9) 0.3 (0.1–1.0)
pH < 7.32 33 (6–76%) 80 (74–85%) 1.7 (0.5–5.4) 0.8 (0.5–1.5)
BE (mmol/l) < −5.7 33 (6–76%) 91 (86–95)% 3.8 (1.1–12.7) 0.7 (0.4–1.3)
HCO3- (mmol/l) < 22 50 (14–86)% 53 (45–60)% 1.0 (0.5–2.4) 1.0 (0.4–2.1)
AST (U/l) > 251 33 (9–69)% 97 (94–98)% 10.3 (3.5–30.0) 0.7 (0.4–1.1)
APTT (sec) > 33 14 (1–58%) 95 (92–97%) 2.8 (0.4–18.7) 0.9 (0.7–1.2)
Positive FAST-result NA 67 (31–91)% 98 (96–99%) 34.3 (15.1–78.5) 0.34 (0.13–0.86)
  1. LR - negative likelihood ratio, LR+ positive likelihood ratio, CI confidence interval