TABLE 2.
Characteristics of completer and non-completer in Trail Making Test part B.
| (a) Completed within a time limit | (b) Not completed within a time limit | (c) Could not understand the instructions | P-value1 | Multiple comparison2 | ||
| n = 1584 | n = 255 | n = 78 | ||||
| Age | Mean (SD) | 77.2 (4.8) | 81.0 (5.6) | 84.2 (6.7) | <0.01 | a <b < c |
| Min-max | 70–94 | 70–96 | 72–100 | |||
| Gender | Female, % | 59.2% | 63.5% | 61.5% | n.s. | |
| Education (years) | Mean (SD) | 12.5 (2.7) | 11.2 (3.2) | 11.4 (3.2) | <0.01 | a > b, c |
| Min-max | 3–29 | 6–27 | 6–20 | |||
| MMSE-J (scores) | Mean (SD) | 27.2 (2.3) | 23.7 (3.5) | 18.9 (5.3) | <0.01 | a > b > c |
| Min-max | 16–30 | 12–30 | 4–28 | |||
| Neurological symptoms | n (%) | 159 (10.0) | 58 (22.7) | 27 (34.6) | <0.01 | a > b > c |
| History of stroke | n (%) | 127 (8.0) | 34 (13.3) | 10 (12.8) | <0.01 | a > b > c |
| Parkinson’s disease | n (%) | 10 (0.6) | 3 (1.2) | 4 (5.1) | n.s. | |
| Dementia | n (%) | 12 (0.8) | 14 (5.5) | 13 (16.7) | n.s. | |
| Current depression | n (%) | 13 (0.8) | 11 (4.3) | 5 (6.4) | n.s. |
MMSE-J, Japanese version of the mini-mental state examination; SD, standard deviation. 1The chi-square test was used to test association among categorical variables, and analysis of covariance was used to compare the means of continuous variables. 2The Bonferroni’s method was used for multiple comparison. Multiple comparisons were made using Ryan’s nominal levels for categorical variables.