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Diagnostic Tests

INPUT TABLE         DISEASE      
        sick   healthy    
  POSITIVE     92
TEST   NEGATIVE     102
94   100   194

 

  OUTPUT TABLE 95% CI
  lower upper
  SENSITIVITY 0.957 0.896 0.983
  SPECIFICITY 0.980 0.930 0.994
 
  Positive Predictive Value 0.978 0.924 0.994
  Negative Predictive Value 0.961 0.903 0.985
 
  LIKELIHOOD RATIO OF PT 47.872 12.132 188.897
  LIKELIHOOD RATIO OF NT 0.043 0.017 0.113
 
  False Positive Proportion 2.000 0.550 7.001
  False Negative Proportion 4.255 1.667 10.436
 
  ACCURACY 0.969 0.934 0.986
  TEST BIAS 0.979 0.926 0.994
 
  Pre-test Likelihood (P) 0.485 0.415 0.554
  Pre-test (1-P) 0.515 0.585 0.446
  Pre-test ODDS 0.940 0.710 1.245
  Post-test ODDS 45.000 33.988 59.580
  Post-test Likelihood 0.978 0.978 0.978