Instructions
Enter the patient’s age, gender and education level. Under the «Change complexity» button, select «Simple» if you only want derived scores for Total learning and Delayed recall, or «Advanced» if you want derived scores for all the subtests (List learning trial I, List learning trial II, List learning trial III, Total learning, % savings and Delayed recall).
Gender
Education
Age
The calculator is valid for persons with age between 70-90 years. If the actual age of the tested person deviate from this the nearest value can be considered.
Z-skår
Persentil
Z score:
The z-score representing the discrepancy from mean in number of standard deviations, shows how the score of the tested person deviates from the normal (average) score of a person at the same age, sex and educational level.
Percentile:
The percentile is the proportion of the population at same age, sex and education that has equal or lower score on CERAD ten words test.
Evaluation of test results
As a rule of thumb, a score between the 16th and 84th percentiles (z-score between -1 and +1) is usually considered within the normal/average range; a score between the 2nd and 15th percentile (z-score between -1 and -2) indicates below the average range; and a score below the 2nd percentile (z-score <-2) implies significantly below the average range («pathological range»). However, precaution in the interpretation of test scores is always required. Evaluation of a patient’s test scores should be done on an individual basis, and, among others, take into consideration the patient’s estimated premorbid cognitive functioning level and motivation in the test situation.