OpenEpi, Version of December 2003

Test Results for Diagnostic or Screening Test Evaluation

 

 

Dataset #

Data

Compared with

Result

Diag 1

Level 1 (normal): 3 true ill,33 true normal

Level 2:  2,6

Level 3:, 2,6

Level 4: 11,11

Level 5: 33, 2

 

Rosner, (2000) Fundamentals of Biostatistics, p. 63, ff.

Sensitivity, Specificity, ROC curve and area under ROC curve agree

 

 

 

 

Diag 2

Test/Condition Count

Pos/pos, 220

Neg/ neg, 400

Neg/ pos 5

Pos/neg 2

-         

 

http://faculty.vassar.edu/lowry/clin1.html

VassarStats Clinical Calculator 1

Agreement for Sens, Spec, Pos Pred Value, Neg Pred. Value, Likelihood ratios.  Confidence limits by a different method are being revised in OpenEpi module.

 

 

 

 

 

 

 

 

 

Testing by Andy Dean, using materials listed. 

Conclusion: Kappa, entropy, bias index, diagnostic odds not yet tested.

Module will be ready for use, although users are advised to confirm important results with at least one other software module.  Retest confidence limits when available.