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    Comparing groups of data sets with the order of data points being taken into account

    Hi everybody, I have a problem related to statistics, and I hope that you can help me out. First, an attempt at a short version of my problem: I have 2 data sets that consist of 3 sub-sets each that I want to compare with a methodology that takes the order of the data points into account. Now...
  2. C

    Statistical significance

    Hi, I have the following problem and I would need some piece of advice to solve it: I have a group of 28 patients (17 survived, 11 died) and I am trying to find out if some of quantities are capable of discriminating survivors from non-survivors with a ROC analysis. For all the considered...
  3. M

    Bootstrapping 0.632+ AUC with fixed test sets

    Hi, I want to compare different binary classifiers in terms of their AUC values on test sets. I have data over one year with about 2000 observations each month. Now I would like to use the data in each of the last three months as separate test sets while using the months prior to a...
  4. M

    Add AUCs

    I want to add Area Under the Curve (AUC) from multiple meta analyses. AUC for each Meta analysis is given. How can I add them together?
  5. E

    Trouble in interpreting the C.I for AUC using SPSS

    I calculated AUC using SPSS and the output was: 0.623, std.Error=0.056. p=0.055. lower Bound was 0.513 and upper was 0.743 How could it be that the p value is not significant and the lower Bound of C.I was more than 0.5? Am I missing something? Thanks
  6. C

    ROC analysis: different results using SPSS and MedCalc

    Hi! I am analyzing a group of patients for which I have the values of a certain test variable X and their survival (1 or 0). I want to perform a ROC analysis and get the AUC value, and the optimal criterion by which I can divide the patients into surviving/non-surviving. The optimal criterion...
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    area under the ROC curve for a cutoff point

    I kindly requested help about a study of mine concerning ROC curve analysis in medical diagnosis. I use R software programme to find optimal cutoff point for a continuous variable. Firstly, I generate a random continuous variable for a diseased and non-diseased subjects from normal...
  8. H

    SPSS- How to do AUC/ROC analyses? Help

    Dear all, Would be grateful for any help/pointers. I've spent the weekend trying to work out how to do area under the curve (ROC) analyses in spss 18. I've done it a couple of years ago but just can't recall how to input the data and where to find the requisite commands! I have the...