Conditions of reading and interpretation of TQS in the emergency room and in the laboratory

Reading and interpretation of testBlood/emergency- TQS [no. (%)]dBlood/laboratory- TQS [no. (%)]d
Operator was a physician (in the emergency department) or a biologist (in the laboratory)747 (76.5)355 (36.2)
Use of the disposable pipette800 (81.4)636 (66.6)
Reading of test within the prescribed time (20 min) as reported by operator842 (94)938 (97.6)
Reading after more than 20 mina111 (11.4)0
Presence of the pink calibration stripb955 (96.7)977 (99.6)
Presence of the pink test stripb
    Yes627 (64.0)774 (79.0)
    Unclear94 (9.6)46 (4.7)
    No257 (26.4)160 (16.3)
Interpretation of testc
    Positive647 (65.5)779 (79.6)
    Inconclusive97 (9.8)38 (3.9)
    Negative244 (24.7)164 (16.8)
  • a Calculated from the times reported by operators on TQS forms.

  • b Although the TQS test was performed in emergency departments for all 988 included patients, data reported by the operator are missing for 7 patients for the pink calibration strip and for 9 patients for the pink test strip. In these cases, the test was interpreted as inconclusive.

  • c Apparent incoherence of interpretation concerning the presence of the pink test strip (more positive tests than observed pink test strips) as reported by operators (in “intention to diagnose”).

  • d Agreement between the tests was 0.510 (95% CI, 0.508 to 0.511).