. 2023 Jun 27;9:e44486. doi: 10.2196/44486

Table 6.

Table6. Subgroup mediation analysis stratified by age based on Sobel tests and Karlson-Holm-Breen (KHB) decomposition methods.

			Health literacy	Smoking status	Sleep duration	Breakfast
≥65 years
	Indirect effect, β		−.002^a	−.001^a	−.001^b	−.002^b
	Direct effect, β		−.015^b	−.016^b	−.016^b	−.014^b
	Total effect, β		−.017^b	−.017^b	−.017^b	−.017^b
	KHB decomposition
		Proportion of mediation effect (%)	4.87	1.33	5.92	9.30
≥75 years
	Indirect effect, β		−.001	−.000	−.001	−.003^a
	Direct effect, β		−.014^b	−.014^b	−.013^b	−.012^a
	Total effect, β		−.014^b	−.014^b	−.014^b	−.014^b
	KHB decomposition
		Proportion of mediation effect (%)	—^c	—	—	18.48

^aP<.01.

^bP<.001.

^cVariables did not taken into KHB decomposition analysis as their mediating effects were not significant.