age (covariate)

0.921*

2.287

0.038

0.079

working hour (covariate)

0.982

0.487

0.817

0.018

Factors

gender

0.961

1.082

0.375

0.039

sons

0.909*

2.645

0.018

0.091

family support

0.912*

2.565

0.021

0.088

gender*sons

0.909*

2.651

0.018

0.091

gender* family support

0.952

1.326

0.249

0.048

sons*family support

0.948

1.450

0.199

0.052

gender*sons*family support

0.957

1.203

0.308

0.043