Table 5 Relative mediation effect of the variable ‘group exercise’

income (ref: very low income)

Y=IADL

Y = MMSE

 low income

−0.06

0.06

(0.01,0.12)

–

−0.01

0.05

(0.01,0.1)

–

 medium income

−0.08

0.14

(0.08,0.19)

–

0.57^**

0.12

(0.07,0.17)

20.44%

 high income

0.37^**

0.24

(0.17,0.3)

64.11%

1.16^***

0.20

(0.15,0.27)

17.53%

 primary

0.98^***

0.17

(0.12,0.22)

17.07%

2.49^***

0.14

(0.09,0.18)

5.43%

 junior

0.86^***

0.44

(0.34,0.54)

50.66%

2.5^***

0.35

(0.26,0.44)

14.08%

 senior and above

1.10^***

0.62

(0.52,0.73)

56.30%

2.8^***

0.50

(0.4,0.61)

17.87%

 governmental & professional

1.83^***

0.31

(0.23,0.39)

16.92%

 commercial & service

0.66^**

0.19

(0.13,0.25)

28.74%