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Table 3 Sensitivity and specificity of the 5 questions for epilepsy diagnosis

From: Low prevalence of epilepsy and onchocerciasis after more than 20 years of ivermectin treatment in the Imo River Basin in Nigeria

 

Confirmed epilepsy

Yes

No

Positive screening

Yes

a = 4

b = 39

No

c = 0

d = 51

  1. Sample population: N = 94
  2. Sensitivity: a/(a + c) = 100%
  3. Specificity: d/(b + d) = 56.7%
  4. Positive predictive value: a/(a + b) = 9.3%
  5. Negative predictive value: d/(c + d) = 100%