Diagnostic efficiency of the Trail Making Test as a function of cut-off score, diagnosis, and age.
This study is a reinvestigation of the effectiveness of the Trail Making Test in discriminating between brain-damaged (n = 51) and pseudoneurologic (n = 72) subjects. All subjects were hospitalized male veterans at the Allen Park Veterans Administration Hospital. An analysis of covariance showed that the pseudoneurologic subjects performed at a significantly higher level than the brain-damaged subjects. Further analysis with two different cut-off scores exhibited unequal discriminatory power throughout the whole range of Trail Making Test scores. These results suggested diagnosing only when the scores were 9 or lower and 13 or higher. This use of extreme scores resulted in an over-all hit rate of 87% in the study. Comparisons with five major subgroupings of the pseudoneurologic subjects yielded only one significant difference: more accurate discrimination with the 12 cut-off score between 10 general-medical and peripheral nerve-damaged subjects (100% correct) and 18 psychotic subjects (39% accuracy).
D000293:Adolescent; D000328:Adult; D000367:Age Factors; D001925:Brain Damage, Chronic / Q000175:diagnosis*; D003937:Diagnosis, Differential; D005069:Evaluation Studies as Topic; D006801:Humans; D008297:Male; D001523:Mental Disorders / Q000175:diagnosis*; D008875:Middle Aged; D011581:Psychological Tests; D011594:Psychometrics; D014145:Trail Making Test