Table 4

Hierarchical regressions of age, sex, environmental discomfort, and psychological variables on asthenopia (only variables with p<0.05 are reported)

		Unstandardised coefficients		Standardised coefficient β		p Value	R²	Adjusted R²
		β	SEM	Standardised coefficient β		p Value	R²	Adjusted R²
Step 1:
Environmental discomfort	0.812	0.366	0.244	0.02	0.059	0.04

Step 2:					0.33	0.28
Self esteem	−0.328	0.128	−0.279	0.012
Group conflict	0.394	0.117	0.335	0.001
Work satisfaction	−0.715	0.242	0.306	0.004
Underuse of skills	0.181	0.073	0.313	0.015
Coworker support	−0.507	0.158	−0.344	0.000

Step 3:					0.34	0.30
Coworker support×group conflict	−0.188	0.051	−0.523	0.000