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Re: st: using roctab when lower values of 'classvar' indicate higher risk
On 27 Márta 2007, at 20:21, Morrison Hodges wrote:
The manual says that when using 'roctab', higher values of
Use -logistic- and then -lroc-, which doesn't care which way your
predictor variable is scaled.
indicate higher risk. I have data using a cardiac variable called
fraction (EF) as 'classvar', which varies from 0.00 to 1.00, with
values indicating higher risk. The 'refvar' is 'status', with
1=dead. The lower the EF the more likely the patient is dead.
Royal College of Surgeons in Ireland
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