roc curve

  1. U

    Is multidimensional ROC Curve Analysis a thing?

    Hi, I'm a student of statistics and right now, in my course, we're studying validation of diagnostic tests. While learning about ROC Curves and AUC, I was wondering if does considering ROC Curves in the multivariate context make sense, and if so, how's the analysis performed and which are the...
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    Question about ROC analysis

    Hi I'm sorry if this question is obvious to some of you. It's just that I have a test that I would like to analyse using Receiver Operating Characteristic and I'm not sure how to proceed. I have a test. Below a certain threshold (80%) the test results are basically random (true or false of...
  3. N

    ROC curve for ordinal regression goodness-of-fit

    Hello everyone, I have a problem with the graphical output of a ROC curve I am calculating. I am sure it is very silly but I cannot figure out where I am going wrong. I estimate the probability of damage (damage levels 1 to 5) to a number of buildings given one continuous explanatory...
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    proper sample size and number of estimation for comparing two predictors' AUCs

    Hello, I am trying to do classification of patients by using different predictors. I want to do bootstrapping for a number of times so that I can come up with a set of Area Under Curve's (AUCs) of ROC curve for each predictor and then compare their effectiveness in classification by...
  5. M

    ROC analysis

    Hi, Im not sure if this is the right place, if not please move it to the correct forum. I have an ROC curve generated using medcalc (400 observations, 100 positive and 300 negative) and what I would like to know is if there is any way I can find out what the sensitivity and specificity of a...
  6. A

    Drawing an ROC curve

    If I have values for `sensitivity` and `specificity` fora group of studies for example like this: sensitivity specificity ----------- ----------- 66.3% 74.7% 87.2% 65.9% 56.4% 76.4% 79.5% 94.3% How...