Table 1 Criteria for scoring the CDT using Mendez-Santos et al. (2015) scoring system
From: Limits on using the clock drawing test as a measure to evaluate patients with neurological disorders
a) Presence of a circle b) Presence of the 12 numbers c) Numbers entered within the internal part of the clock d) Numbers entered in the correct ascending order. e) Numbers entered in the correct spatial margin f) Ability to draw a vertical straight line between 12 and 6 g) Ability to draw a horizontal straight line between 3 and 9 h) Numbers are not focused on one side of the clock i) Presence of two pointers j) Presence of the hour hand k) Presence of the minute hand l) The minute hand is longer than the hour hand m) One of the hands has to be between 2 and 3 to show the minute n) One of the hands has to be between 10 and 11 to show the hour o) Wrong use of hands whether drawn digital type or circling the numbers inappropriately p) Some clues show that the requested task is understood as a clock. q) It did not represent a clock or the patient did not try to draw a clock. | |
Additional scoring included the following items: 1. If the item “o” is checked, the score is will be 6 points. 2. If the item “p” is checked, the score will be 2 points. 3. If the item “q” is checked, the score will be 1 point. | |
If the clock and the numbers are drawn correctly, the score will be between 6 and 10 and if they are drawn incorrectly, the score will be between 1 and 5:a 1. The patient did not try or did not represent a clock (presence of “X” in item q) 2. Only a little evidence exists that shows an understanding of the clock (“X” in p) 3. No hands (No “X” in I, j, k) 4. Missing Numbers internally and located outside of the clock (No “X” in b and c) 5. Reversed order of the numbers of concentrated shapes (no “X” in d or h) 6. Wrong use of hands (presence of “X” in item o) 7. Severe deficit of the hands (No “X” in the items of l, m, n) 8. Mild deficit of the hands (No “X” in at least 2 items of l, m, n) 9. Very mild deficit of the hands (absence of “X” in at least one item: l, m or n) 10. Correct time (no “X” in the items: o, p, q) |