Table 3 Univariate and multivariate linear regression analysis of the fine motor and MoCA

Same-pattern tapping test

 Completion time (s)

-0.217 (-0.081, -0.024)

< 0.001

-0.158 (-0.067, -0.010)

0.009

 Time difference between hands (s)

-0.265 (-1.361, -0.528)

< 0.001

-0.204 (-1.147, -0.309)

0.001

Pieces flipping test

 Completion time_ dominant hand (s)

-0.143(-0.019, -0.002)

0.019

-0.066(-0.013,0.004)

0.277

 Completion time_ non-dominant hand (s)

-0.231(-0.023, -0.008)

< 0.001

-0.176(-0.019, -0.004)

0.003

Pegboard test

 Completion time (s)

-0.199 (-0.013, -0.003)

0.001

-0.132(-0.010, -0.001)

0.027

 Trajectory distance_ dominant hand (cm)

-0.246 (-0.147, -0.052)

< 0.001

-0.169(-0.115, -0.021)

0.004

 Trajectory distance_ non-dominant hand (cm)

-0.202 (-0.135, -0.035)

0.001

-0.129(-0.103, -0.006)

0.029

Dual-hand drawing test

 Completion time (s)

-0.018 (-0.046, 0.034)

0.768

-0.011(-0.042, 0.035)

0.846

 Coverage_ dominant hand (%/s)

0.213 (0.219, 0.764)

< 0.001

0.183(0.155, 0.689)

0.002

 Coverage_ non-dominant hand (%/s)

0.179 (0.153, 0.761)

0.003

0.153(0.094, 0.683)

0.010

 Coverage difference between hands (%/s)

-0.064 (-0.739, 0.228)

0.299

0.065(-0.729, 0.208)

0.274