Table 10.

Summary of test results of physical environment through mental health mediation.

Item	C total effect	a	b	a*b mediating effect size	a*b (p-value)	a*b (95% BootCI)	c' direct effect	Effect ratio	Test results
Environmental quality = > positive mental health = > sleep quality	0.225**	0.188**	0.130**	0.024	0.070	0.012–0.065	0.201**	10.820%	Partial intermediary
Vegetation greening = > positive mental health = > sleep quality	0.022	0.111**	0.130**	0.014	0.155	0.007–0.046	0.007	100%	Fully mediated
Artistic features = > positive mentalh = > sleep quality	−0.021	0.140**	0.130**	0.018	0.093	0.011–0.053	−0.039	100%	Fully mediated
Architectural characteristics = > positive mental health = > sleep quality	−0.048*	0.118**	0.130**	0.015	0.125	0.009–0.047	−0.063**	24.172%	Masking effect
Design scale = > positive mental health = > sleep quality	0.050*	0.218**	0.130**	0.028	0.139	0.019–0.092	0.022	100%	Fully mediated
Service facilities = > positive mental health = > sleep quality	0.193**	0.178**	0.130**	0.023	0.051	0.012–0.058	0.170**	11.938%	Partial intermediary

^*p < 0.05,

^**p < 0.01.