Table 4.

Multiple linear regression with general health as outcome variable, and perceived stress, mental toughness, sleep disturbances, exerciser status, age, and gender as predictors.

Dimension	Variables	Coefficient	Standard Error	Coefficient β	t	p	R	R2	Durbin–Watson
General Health	Intercept	9.607	2.33	–	4.116	0.000	0.683	0.466	1.68
	PSQI	2.601	0.229	0.617	11.310	0.000
	Mental toughness	−0.221	0.114	−0.134	−2.175	0.03
	Exercise status 1	−3.989	1.15	−0.118	−3.580	0.000
	Age	0.120	0.043	0.158	2.93	0.004
	Exercise status × sleep complaints interaction 2	−0.932	0.460	−0.110	−2.030	0.044
	Excluded variables: Perceived stress; gender; ts < 1.0; ps > 0.30

Notes: PSQI = Pittsburgh sleep quality index; higher scores reflect more impaired sleep; ¹ = heavy exercisers; ² = light exercisers.