Table 8 The Sobel-Goodman Mediation Tests of URRBMI on family financial support

Mediator: Medical expenses_{Out-of-pocket ratio}

Coefficient

Std Err

Z

P > Z

a coefficient

-0.030

0.004

-8.452

0.000

b coefficient

-0.335

0.091

-3.680

0.000

Indirect effect

0.010

0.003

3.374

0.001

Direct effect

0.177

0.076

2.319

0.020

Total effect

0.187

0.076

2.453

0.014

Proportion of total effect that is mediated: 0.054

Ratio of indirect to direct effect: 0.057

Ratio of total to direct effect: 1.057

Mediator: Ln (Health expenses)

Coefficient

Std Err

Z

P > Z

a coefficient

0.306

0.053

5.725

0.007

b coefficient

0.048

0.006

8.292

0.000

Indirect effect

0.015

0.003

4.711

0.000

Direct effect

0.504

0.073

6.955

0.000

Total effect

0.519

0.073

7.155

0.000

Proportion of total effect that is mediated: 0.028

Ratio of indirect to direct effect: 0.029

Ratio of total to direct effect: 1.029