Cognitive Impairment: delirium, dementia, tumours, hypotension, etc.

The 10 point Clock Test varies slightly between doctors. Usually, a patient is asked to draw in a circle divided into eight, a clock face displaying the time of 11:10.

One point is given to each of the numbers (1,2,3,4,5,6,7,8,9,10,11,12) if they are in a very close area to the section of the circle they would usually be in. Another point is given for the short hand being drawn to 11 and the longer hand at 2 (the difference of the length of hands being immediately obvious).

By scoring 10 is is unlikely that the patient is suffering from cognitive impairment. In medically stable patients, the scores are likely to stay the same. Patients scoring 5 and under indicates impairment.

When tested in hospitals, the correlation shows the lower the clock score, the higher the impairment. Patients with major depression, alcohol dependence and adjustment reaction all scored higher than 5 points, while patients with dementia and delirium scored 10 points.

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