Index of disease activity

The method of summated ratings can be shown readily using the index of disease activity (IDA) for rheumatoid arthritis proposed by Mallya and Mace. Six aspects of the patient s condition are assessed (morning stiffness, pain, grip strength, articular index, haemoglobin and the one hour erythrocyte sedimentation rate) and points are assigned to the values of each of these on a scale of 1 (the best situation) to 4 (the worst possibility). 

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