Table 2.

Results of stepwise regression for depression.

Variables	b	SE b	95% CI		t	p	F	df	p	R2	ΔR2
			LL	UL
Step 1							6.63	2	0.001	0.02	0.02
Gender	1.80	0.73	0.36	3.24	2.46	0.01
Age	−0.24	0.09	−0.42	−0.06	−2.63	0.01
Step 2							39.81	4	<0.001	0.18	0.16**
Gender	0.91	0.68	−0.41	2.24	1.35	0.18
Age	−0.18	0.08	−0.34	−0.01	−2.11	0.03
Distance learning domain	0.549	0.058	0.44	0.66	9.46	<0.001
Technical domain	0.782	0.157	0.47	1.09	4.97	<0.001
Step 3							212.03	7	<0.001	0.66	0.49**
Gender	0.10	0.43	−0.75	0.95	0.24	0.81
Age	−0.06	0.05	−0.16	0.05	−1.07	0.28
Distance learning domain	−0.04	0.04	−0.13	0.04	−1.05	0.29
Technical domain	0.06	0.10	−0.14	0.27	0.63	0.53
Emotional tension	0.30	0.05	0.19	0.41	5.56	<0.001
External stress	0.31	0.06	0.20	0.43	5.48	<0.001
Internal stess	0.724	0.06	0.62	0.83	13.10	<0.001

^**p < 0.01. COVID-19, Corona Virus Disease 2019; PSQ, Perception of Stress Questionnaire; BDI-II, Beck Depression Inventory; SD, standard deviations.