Reference data for derived Trail Making Test scores in Greek healthy population
© Zalonis et al; licensee BioMed Central Ltd. 2009
Published: 22 April 2010
The Trail Making Test (TMT) via part B (TMT-B) has been widely used in the evaluation of the executive functions . Apart from the direct scores (time to complete part A and B), derived TMT scores (B-A, B/A, B-A/A) are more and more used, as sensitive measures of prefrontal functioning [2–4]. The aim of the present study was to provide reference data from a large sample of Greek healthy participants in derived TMT scores.
Materials and methods
Six hundred and forty-three healthy participants (aged between 16-83 yrs and with an educational level between 6-18 yrs) were included, satisfying the exclusion criteria of medical, psychiatric and neurological disorders. From the TMT performance, we further calculated the following derived scores: the difference score (B-A), the ratio score (B/A) and the proportional score (B-A/A).
For the entire sample (♂/♀: 382/261; age: 48.5 ± 17 yrs; education: 12 ± 3.5 yrs), derived mean scores for (B-A) was 61.7 ± 43.6 seconds (range: 1-325 seconds), for (B/A) was 2.3 ± 0.8 (range: 1-7.4), and for (B-A/A) was 1.3 ± 0.8 (range: 0.01-6.4). At p < .05, age was significantly associated with (B-A) (r = 0.53), (B/A) (r = 0.27) and (B-A/A) (r = 0.27) scores. Significant correlations (p < .05) were also emerged between years of education and the three previous mentioned derived scores (r = -0.20, r = -0.13, r = -0.13, respectively). Gender was unrelated to derived TMT scores (r < .05, p n.s.). Based on post-hoc comparisons between age groups (per decade of age) and education groups (6-9 yrs, 10-12 yrs, 13-18 yrs), we stratified our sample according to age and years of education and present reference data for the three derived TMT scores as mean (sd).
The Greek reference data for the derived TMT measures, stratified by age and education, are presented for application in clinical and experimental practice as useful indices in identification of probable executive dysfunction.
- Lezak MD, Howieson DB, Loring DW: Neuropsychological Assessment. 2004, NY Oxford University PressGoogle Scholar
- Lamberty GJP, Chatel SH, Bieliauskas DM, et al: Derived Trail Making Test indices: A preliminary report. Neuropsychiatry, Neuropsychology, & Behavioral Neurology. 1994, 7: 230-234.Google Scholar
- Stuss DT, Bisschop SM, Alexander MP, et al: The Trail Making Test: A study in focal lesion patients. Psychological Assessment. 2001, 13: 230-239. 10.1037/1040-35126.96.36.199.View ArticlePubMedGoogle Scholar
- Drane DL, Yuspeh RL, Huthwaite JS, et al: Demographic characteristics and normative observations for derived-trail making test indices. Neuropsychiatry, Neuropsychology and Behavioral Neurology. 2002, 15: 39-43.Google Scholar
This article is published under license to BioMed Central Ltd.