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Sports Medicine - Open

Table 2 Comparison of removal- from-play and theoretical HIA01 screening tool performance

From: The performance of the World Rugby Head Injury Assessment Screening Tool: a diagnostic accuracy study

Index test

TP

FN

FP

TN

Sensitivity

(%, 95% CI)

Specificity

(%, 95% CI)

AUROC

(95% CI)

Real-life removal- from-play decisionsa

343

105

90

580

76.6 (72.4–80.4)

86.6 (83.7–89.1)

0.8 (0.8–0.8)

HIA01 screening toolb (baseline thresholds)

389

45

408

209

89.6 (86.4–92.3)

33.9 (30.1–37.8)

0.6 (0.6–0.6)

HIA01 screening toolc (normative thresholds)

360

88

208

462

80.4 (76.4–83.9)

69.0 (65.3–72.4)

0.8 (0.7–0.8)

  1. TP true positive, FN false negative, FP false positive, TN true negative, AUROC area under the curve of the receiver operating characteristic
  2. aIndex test: removed from play v returned to play
  3. bIndex test: any sub-test score worse than baseline value v no sub-test score worse than baseline value and no subjective clinical signs of a possible concussion
  4. cIndex test: any sub-test score worse than normative threshold v no sub-test score worse than a normative threshold and no subjective clinical signs of a possible concussion
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