gdi (gait deviation index)

The gait deviation index (gdi) is a single number measuring overall gait deviation. The <gdi> task determines this index for a given test data file or for all sessions of a basedata the index is based on.

The GDI can be interpreted as follows: A score of 100 indicates a GDI equal to the average of the control group. Every 10 point deficit is 1 standard deviation below control. So, a GDI=75 indicates a subject who is 2.5 standard deviations below the control in termin of gait deviation measured by the GDI. Scores of 100 or greater indicate gait that is typical.

Attributes

Attribute Default Description Required 
svdfile
 


        		

        d3d file with the svd decomposition, created by
 the <svd> task


        		

        Yes


        		

      


      


        
        
controldatafile


        		

        
        


        		

        d3d file with mean control data created from the task
<gdicontroldata>


        		

        Yes

      


      


        
        
controldataset


        		

        
        
Mean|Projection


        		

        

        No

      


      


        
        
testdatafile


        		

        
        


        		

        HD-ASC/gla file with the subject data, the gait
deviation
index should be calculated.


Ether the attribute "testdatafile" or "gdifordatabase" has to be set to
a valid value.		

        No


        		

      


      


        
        
testdatafilelist


        


        		

        
        


        		

        Eine filelist, um gleich für viele subjects
den gdi zu bestimmen


(not implemented yet)		

        No

      


      


        
        
gdifordatabase


        		

        
        
false


        		

        if set to true, the gdi is calculated for each of the
intput data base sessions.


Derzeit erfolgt eine Ausgabe nur auf System.out. Besser wäre
es hier noch eine Datei zu definieren		

        No

      


    
  






Note




The gait deviation index is printed in the System.out.




Examples




  
<gdi svdfile="svd.d3d"
     controldatafile="normSubject.d3d"
     testdatafile="subject.gla"/>