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Good morning all. Just picking brains here if I can please? I am interested in measuring circulating concentrations of angiopoietin-1 (angpt-1) in patient samples. Several manufacturers indicate...
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Hi all I've been running a ROC analysis in R, predominantly using the pROC package. The analysis is complete, however, generated figures are not particularly attractive. I've been trying to use...
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Hi all I'm currently running a series of linear models to identify the most parsimonious combination of covariates with the highest predictive power. I would normally go for a GLM, but am...
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Hi All I've generated a series of ROC curves in R and have initially compared performance using DeLong's test. I am also interested in computing NRI, but have had no prior experience in this. Any...
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Hi all I'm interested in assessing the value of novel blood borne markers to improve cardiovascular death. I was planning on using AIC and ROC analysis to check whether considering these markers...
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Hi All I'm interested in generating ROC curves to compare the ability of models containing up to 5 variables to classify patients with and without disease. I've had a quick play with pROC which...
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Hi All I'm trying to run a MuMIn analysis after fitting a Cox proportional hazards analysis. Previously this has worked fine, but after an update I'm getting interesting error messages where there...
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