Table 2 Comparisons of differences in fine motor function between CH group and CI group

Same-pattern tapping test

 Completion time (s)

22.88(19.78, 28.23)

25.76(21.39, 34.28)

0.001

 Time difference between hands (s)

0.33(0.18, 0.58)

0.60(0.23, 1.10)

< 0.001

Pieces flipping test

 Completion time_ dominant hand (s)

81.95(58.79, 114.49)

93.89(68.33, 128.79)

0.079

 Completion time_ non-dominant hand (s)

84.79(61.97, 109.36)

102.61(75.27, 138.30)

< 0.001

Pegboard test

 Completion time (s)

115.35(87.58, 166.34)

137.13(102.15, 220.59)

0.003

 Trajectory distance_ dominant hand (cm)

15.17(10.49, 20.75)

19.19(14.63, 26.59)

< 0.001

 Trajectory distance_ non-dominant hand (cm)

15.42(11.03, 21.10)

18.55(13.00, 25.61)

0.001

Dual-hand drawing test

 Completion time (s)

22.22(17.40, 27.22)

21.54(15.54, 32.79)

0.866

 Coverage_ dominant hand (%/s)

3.19(2.39, 3.89)

2.55(1.70, 3.64)

< 0.001

 Coverage_ non-dominant hand (%/s)

2.75(2.16, 3.76)

2.43(1.58, 3.37)

0.009

 Coverage difference between hands (%/s)

0.70(0.29, 1.13)

0.65(0.33, 1.26)

0.563