ROC Curve analysis and Ordinal Outcome

[Alberto Osella]

Hi All!!
I should perform a ROC Curve analysis where my gold standard is an ordinal score from 0 to 6 while the test is a continuous one. Is it possible in Stata? I'm using W10 and Stata 14. Thank you very much

[Joseph Coveney]

At Stata's command line, type

help rocgold

.ÿversionÿ14.2

.ÿ
.ÿclearÿ*

.ÿsetÿmoreÿoff

.ÿsetÿseedÿ1391947

.ÿ
.ÿsysuseÿauto
(1978ÿAutomobileÿData)

.ÿquietlyÿreplaceÿrep78ÿ=ÿruniformint(1,ÿ5)ÿifÿmissing(rep78)

.ÿ
.ÿrenameÿrep78ÿgold

.ÿrenameÿmpgÿtest

.ÿrenameÿforeignÿdisease

.ÿ
.ÿ*
.ÿ*ÿBeginÿhere
.ÿ*
.ÿtabulateÿgold

ÿÿÿÿÿRepairÿ|
Recordÿ1978ÿ|ÿÿÿÿÿÿFreq.ÿÿÿÿÿPercentÿÿÿÿÿÿÿÿCum.
------------+-----------------------------------
ÿÿÿÿÿÿÿÿÿÿ1ÿ|ÿÿÿÿÿÿÿÿÿÿ3ÿÿÿÿÿÿÿÿ4.05ÿÿÿÿÿÿÿÿ4.05
ÿÿÿÿÿÿÿÿÿÿ2ÿ|ÿÿÿÿÿÿÿÿÿ10ÿÿÿÿÿÿÿ13.51ÿÿÿÿÿÿÿ17.57
ÿÿÿÿÿÿÿÿÿÿ3ÿ|ÿÿÿÿÿÿÿÿÿ30ÿÿÿÿÿÿÿ40.54ÿÿÿÿÿÿÿ58.11
ÿÿÿÿÿÿÿÿÿÿ4ÿ|ÿÿÿÿÿÿÿÿÿ19ÿÿÿÿÿÿÿ25.68ÿÿÿÿÿÿÿ83.78
ÿÿÿÿÿÿÿÿÿÿ5ÿ|ÿÿÿÿÿÿÿÿÿ12ÿÿÿÿÿÿÿ16.22ÿÿÿÿÿÿ100.00
------------+-----------------------------------
ÿÿÿÿÿÿTotalÿ|ÿÿÿÿÿÿÿÿÿ74ÿÿÿÿÿÿ100.00

.ÿsummarizeÿtest

ÿÿÿÿVariableÿ|ÿÿÿÿÿÿÿÿObsÿÿÿÿÿÿÿÿMeanÿÿÿÿStd.ÿDev.ÿÿÿÿÿÿÿMinÿÿÿÿÿÿÿÿMax
-------------+---------------------------------------------------------
ÿÿÿÿÿÿÿÿtestÿ|ÿÿÿÿÿÿÿÿÿ74ÿÿÿÿÿ21.2973ÿÿÿÿ5.785503ÿÿÿÿÿÿÿÿÿ12ÿÿÿÿÿÿÿÿÿ41

.ÿ
.ÿrocgoldÿdiseaseÿgoldÿtest

-------------------------------------------------------------------------------
ÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿROCÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿBonferroni
ÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿAreaÿÿÿÿÿStd.ÿErr.ÿÿÿÿÿÿÿchi2ÿÿÿÿdfÿÿÿPr>chi2ÿÿÿÿÿPr>chi2
-------------------------------------------------------------------------------
goldÿ(standard)ÿÿÿÿÿ0.8112ÿÿÿÿÿÿÿ0.0572
testÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿ0.7286ÿÿÿÿÿÿÿ0.0675ÿÿÿÿÿÿ1.2492ÿÿÿÿÿ1ÿÿÿÿ0.2637ÿÿÿÿÿÿ0.2637
-------------------------------------------------------------------------------

.ÿ
.ÿexit

endÿofÿdo-file


.

[Alberto Osella]

Thank you very much!!!!!!