Table 2: Pearson's correlation coefficients between cognitive function tests and duration of education

Measurement CDT 3MS K-MMSE Education
CDT 1 0.272** 0.277** 0.268**
3MS 0.272** 1 0.739** 0.205**
K-MMSE 0.277** 0.739** 1 0.238**
Education 0.268** 0.205** 0.238** 1


CDT: Clock Drawing Test, 3MS: Modified Mini-Mental State (3MS) test, K-MMSE: Korean version of the Mini-Mental State Examination.