Table 3.

Mediation effects of depressive symptoms in LE8 components—NAFLD pathways (Adjusting for model 5’s covariates)

LE8 components	Path coefficients and significance	Total effect β (95% CI)	Direct effect β₃ (95% CI)	Mediating effect (β₁*β₂)	Mediation proportion	Mediation significance (P value)
HEI-2015 diet score	β₁ = − 0.04(− 0.06, − 0.03), P < 0.001; β₂ = 0.27(0.14,0.39), P < 0.001	− 0.03(− 0.05, − 0.02), P < 0.001	− 0.03(− 0.04, − 0.01), P < 0.001	− 0.0108	5.79%	< 0.001
Physical activity score	β₁ = − 0.04(− 0.06, − 0.02), P < 0.001; β₂ = 0.28(0.15,0.41), P < 0.001	− 0.01(− 0.02,0.00), P = 0.226	− 0.01(− 0.02,0.01), P = 0.342	− 0.0112	17.74%	< 0.001
Nicotine exposure score	β₁ = − 0.12(− 0.15, − 0.09), P < 0.001; β₂ = 0.30(0.17,0.43), P < 0.001	0.02(0.00,0.03), P = 0.040	0.02(0.01,0.04), P = 0.010	− 0.036	− 27.55%	< 0.001
Sleep health score	β₁ = − 0.14(− 0.16, − 0.11), P < 0.001; β₂ = 0.27(0.15,0.40), P < 0.001	− 0.01(− 0.03,0.01), P = 0.188	− 0.00(− 0.02,0.01), P = 0.558	− 0.0378	46.78%	< 0.001
BMI score	β₁ = − 0.04(− 0.07, − 0.02), P = 0.003; β₂ = 0.28(0.05,0.51), P = 0.019	− 0.52(− 0.55, − 0.50), P < 0.001	− 0.52(− 0.55, − 0.50), P < 0.001	− 0.0112	0.22%	0.024
Blood lipids score	β₁ = − 0.02(− 0.04, − 0.01), P = 0.032; β₂ = 0.27(0.15,0.40), P < 0.001	− 0.05(− 0.07, − 0.03), P < 0.001	− 0.05(− 0.07, − 0.03), P < 0.001	− 0.0054	1.53%	0.076
Blood glucose score	β₁ = − 0.02(− 0.05,0.01), P = 0.298; β₂ = 0.29(0.16,0.41), P < 0.001	− 0.07(− 0.09, − 0.05), P < 0.001	− 0.07(− 0.09, − 0.05), P < 0.001	− 0.0058	1.21%	0.152
Blood pressure score	β₁ =− 0.01(− 0.03,0.01), P = 0.418; β₂ = 0.29(0.16,0.41), P < 0.001	-0.05(-0.06, -0.03), P < 0.001	− 0.05(− 0.06, − 0.03), P < 0.001	− 0.0029	1.09%	0.324