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Table 2 PPV and sensitivity of dispatch for stroke/TIA symptom identification

From: The use of Cincinnati prehospital stroke scale during telephone dispatch interview increases the accuracy in identifying stroke and transient ischemic attack symptoms

  Positive predictive value Sensitivity
Age n/N % 95% CI n/N % 95% CI
  <=60 907/4856 18.7 (17.6-19.8) 907/1303 69.6 (67.0-72.1)
  >60 5355/13375 40 (39.2-40.9) 5355/8488 63.1 (62.1-64.1)
Presence of CPSS       
  Yes 3038/4527 67.1 (65.7-68.5) 3038/3487 87.1 (86.0-88.2)
  No 3224/13704 23.5 (22.8-24.2) 3224/6304 51.1 (49.9-52.4)
Centre using CPSS       
  > = 10% of cases 4333/7396 58.6 (57.5-59.7) 4333/6098 71.1 (87.0-88.6)
  <10% of cases 1929/10835 17.8 (17.1-18.5) 1929/3693 52.2 (50.6-53.9)
  1. CPSS - Cincinnati Prehospital Stroke Scale.