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British Journal of Radiology (2003) 76, 532-535
© 2003 British Institute of Radiology
doi: 10.1259/bjr/89012738
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Red flags in patients presenting with headache: clinical indications for neuroimaging

Sobri M, MRad(USM)1, A C Lamont, FRCR2, N A Alias, MRad(UKM)1 and M N Win, FRCP3

1 Department of Radiology, University Putra Malaysia-Hospital Kuala Lumpur, 2 Department of Radiology, Mater Childrens Hospital, Brisbane, Australia and 3 Department of Medicine, International Medical University, Malaysia



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  		Figure 1. Receiver operating characteristic (ROC) curve. This graph plots sensitivity vs 1-specificity giving rise to ROC curve. The graph shows area under the curve=0.76. Red flag=3 (point=0.62) represents the cut-off point (both sensistivity and specificity are optimum derived from specificity and sensitivity 2 x 2 table).

 




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