Table 1 Comparison of baseline information

Number

21

41

32

19

-

-

Age(\(\overline{\mathrm x}\) ± s, years)

64.67 ± 8.71

65.24 ± 6.77

66.38 ± 7.58

64.21 ± 7.77

F = 0.398

0.755

BMI(\(\overline{\mathrm x}\) ± s,kg/m²)

26.87 ± 3.29

27.51 ± 2.63

28.20 ± 2.61

27.68 ± 3.95

F = 0.852

0.468

Side(R/L)

13/8

21/20

15/17

7/12

χ² = 2.647

0.449

Gender (M/F)

6/15

13/28

9/23

8/11

χ² = 1.229

0.746