Table 2

2×2 contingency table summarising the performance of the IRB PSCA tool

Index testReference standardTotal
Concussion confirmedNo concussion
PSCA test positive55 (TP)26 (FP)81
PSCA test negative10 (FN)74 (TN)84
Total65100165
  • FN, false negative; FP, false positive; IRB, International Rugby Board; PSCA, Pitch Side Concussion Assessment; TN, true negative; TP, true positive.