[R] missclassification in estimating proportions

[pattebegga]

Hi

Assume that I want to compare two methods, say skinfold measurement and BMI,
in how they classify subjects into four categories. In a 2x2 table I would
simply calculate sensitivity and specificity and NPV an PPV, using the
standard formulas, but can the same be directly applied in the 4x4 table? Or
are other methods preferable?

Thanks in advance

Patrick



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