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Table 9 Subgroup mediation analysis stratified by gender and residence based on Sobel tests and Karlson-Holm-Breen (KHB) decomposition methods

From: The association between smoking and family health with the mediation role of personality among Chinese people: nationwide cross-sectional study

 

Extraversion

Agreeableness

Conscientiousness

Nervousness

Openness

Male

 Family health → mediator coefficient

0.026*

0.063*

0.049*

0.039*

0.026*

 Mediator → smoking coefficient

0.011*

0.010*

0.010*

0.013*

-0.006*

 Indirect effect, β

0.000

0.001*

0.000

0.000*

-0.000

 Direct effect, β

-0.002*

-0.003*

-0.002*

-0.002*

-0.002

 Total effect, β

-0.002

-0.002

-0.002*

-0.002

-0.002

 Sobel test

3.960*

3.196

3.397

4.205*

-2.205

KHB decomposition

 Proportion of mediation effect (%)

43.48

--

--

56.52

--

Female

 Family health → mediator coefficient

0.031*

0.064*

0.050*

0.016*

0.027*

 Mediator → smoking coefficient

0.002

-0.002

-0.002

0.004*

0.002

 Indirect effect, β

0.000

-0.000

0.000

0.000

0.000

 Direct effect, β

-0.003*

-0.003*

-0.003*

-0.003*

-0.003*

 Total effect, β

-0.003*

-0.003*

-0.003*

-0.003*

-0.003*

 Sobel test

1.491

-1.979

-1.651

2.972

1.971

KHB decomposition

 Proportion of mediation effect (%)

--

--

--

--

--

Rural

 Family health → mediator coefficient

0.028*

0.057*

0.041*

0.025*

0.035*

 Mediator → smoking coefficient

0.007*

0.004

0.004

0.009*

-0.001

 Indirect effect, β

0.000*

0.000

0.000

0.000*

-0.000

 Direct effect, β

-0.002*

-0.002*

-0.002*

-0.002*

-0.001

 Total effect, β

-0.001*

-0.001*

-0.001*

-0.001*

-0.001*

 Sobel test

3.429*

1.961

2.026

4.149*

-0.378

KHB decomposition

 Proportion of mediation effect (%)

52.36

--

--

47.64

--

Urban

 Family health → mediator coefficient

0.028*

0.073*

0.060*

0.032*

0.015*

 Mediator → smoking coefficient

0.005

0.003

0.002

0.006

-0.003

 Indirect effect, β

0.000

0.000

0.000

0.000

-0.000

 Direct effect, β

-0.004*

-0.004*

-0.004*

-0.004*

-0.003*

 Total effect, β

-0.003*

-0.003*

-0.003*

-0.003*

-0.003*

 Sobel test

2.041

1.113

0.823

2.620

-1.329

KHB decomposition

 Proportion of mediation effect (%)

--

--

--

--

--

  1. The Sobel test was used to test the hypothesis that the indirect role was equal to 0, adjusting for potential confounders (age, gender, household type, marital, education, income, work status, religion, political, residence, chronic diseases, negative event and depression). Values are marked with * if they achieved statistical significance at p ≤ 0.001
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BMC Psychiatry

ISSN: 1471-244X

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