Table 4. Correlation among the five TMTs and cognitive measures.

^*p<0.01.

BNT: Boston Naming Test, COWAT-P: Controlled Oral Word Association Test-Phonemic word fluency, COWAT-S: Controlled Oral Word Association Test-Semantic word fluency, DSB: digit span backward, DSF: digit span forward, MMSE: Mini Mental Examination, RCFT copy: Rey Complex Figure Test copy, RCFT-D: Rey Complex Figure Test-20-minute delayed recall test, RCFT-I: Rey Complex Figure Test-Immediate recall test, RCFT-R: Rey Complex Figure Test-Recognition test, CDR-SOB: Clinical Dementia Rating scale-Sum of Boxes, Stroop test-C: Stroop test-color reading, TMT: Trail Making Test, TMT-A: A form of TMT, TMT-B: B form of TMT, TMT-B&W: TMT-black and white, TMT-KC: Korean consonants version of TMT, TMT-KL: Korean letter version of TMT, TMT-S&C: TMT-square and circle, VLT-D: Verbal Learning Test-20-minute delayed recall test, VLT-I: Verbal Learning Test-immediate recall test, VLT-R: Verbal Learning Test-recognition test.