Effect of socioeconomic status on the physical and mental health of the elderly: the mediating effect of social participation

Table 4 Omnibus effect analysis (F value)

M	X	Y=IADL				Y = MMSE
M	X	omnibus total effect	omnibus direct effect	bootstrap 95% CI		omnibus total effect	omnibus direct effect	bootstrap 95% CI
Group exercise	Income	4.94^**	2.90^***	0.002	0.005	14.19^***	10.20^***	0.001	0.004
	Education	27.53^***	17.84^***	0.009	0.016	80.99^***	68.32^***	0.007	0.013
	Occupation	2.63	1.24	0.003	0.008	28.14^***	19.68^***	0.003	0.006
Interact with friends	Income	5.15^**	4.34^***	0	0.002	14.35^***	11.84^***	0	0.002
	Education	27.46^***	19.44^***	0.001	0.005	81.32^***	71.72^***	0.001	0.005
	Occupation	2.70	4.60^**	−0.001	0.001	28.17^***	31.26^***	0	0.001
organized social activities	income	4.82^**	3.54^**	0.001	0.004	14.20^***	12.75^***	0.001	0.003
	education	27.16^***	24.04^***	0.012	0.023	79.92^***	76.21^***	0.007	0.016
	occupation	2.56	0.75	0.007	0.015	28.31^***	23.00^***	0.005	0.011

M mediation variable, X independent variable, Y dependent variable, CI confidence intervals; the bootstrap 95% CI was for omnibus mediation effect
*p < .05, **p < .01, ***p < .001

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