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Table 2 The Effects of Physical Activity on Quality of Life Through Depression

From: Physical activity and health-related quality of life in older adults: depression as a mediator

Variable

PCS

Mediated effect

MCS

Mediated effect

 

Effect

95% CI

(%)

Effect

95% CI

(%)

Leisure-time activities (Ref: Light)

Moderate

     

Total effect

1.508***

1.097 to 1.920

 

1.437***

0.973 to 1.901

 

Direct effect

1.285***

0.879 to 1.692

 

0.193

-0.208 to 0.595

 

Indirect effect

0.223***

0.153 to 0.293

14.79

1.243***

1.008 to 1.479

86.50

Vigorous

     

Total effect

1.930***

1.527 to 2.332

 

2.989***

2.547 to 3.432

 

Direct effect

1.607***

1.209 to 2.005

 

1.190***

0.797 to 1.582

 

Indirect effect

0.323***

0.232 to 0.413

16.74

1.800***

1.585 to 2.015

60.22

Household activities (Ref: Light)

Moderate

     

Total effect

1.664***

1.276 to 2.052

 

1.516***

1.075 to 1.957

 

Direct effect

1.572***

1.186 to 1.959

 

1.021***

0.639 to 1.402

 

Indirect effect

0.092***

0.045 to 0.139

5.53

0.496***

0.274 to 0.718

32.72

Vigorous

     

Total effect

2.073***

1.669 to 2.476

 

1.499***

1.046 to 1.953

 

Direct effect

1.935***

1.535 to 2.336

 

0.757***

0.361 to 1.153

 

Indirect effect

0.137***

0.085 to 0.190

6.61

0.742***

0.521 to 0.963

49.50

Work-related activities (Ref: No)

Total effect

1.188***

0.133 to 0.254

 

1.687***

1.129 to 2.245

 

Direct effect

0.995***

0.468 to 1.523

 

0.660***

0.141 to 1.180

 

Indirect effect

0.193***

0.658 to 1.718

16.25

1.026***

0.819 to 1.234

60.82

  1. N = 7,518. Models adjusted for age, gender, education, marital status, monthly income, living situation (alone or with spouse/children), smoking status, alcohol intake, instrumental activities of daily living and basic activities of daily living. PCS: Physical Component Summary; MCS: Mental Component Summary; CI: confidence interval. ***p < 0.001