Investigation of the Relationship between Psychological Variables and Sleep Quality in Students of Medical Sciences

Table 3

Comparison of the mean scores of stress, anxiety, depression, and sleep quality among students based on their studying grade.

Variable	Degree			value
	Associate degree	Bachelor’s degree	Doctorate degree
	Mean ± SD	Mean ± SD	Mean ±SD
Stress	6.23 ± 5.05	8.51 ± 5.08	7.62 ± 5.21	0.059
Anxiety	3.90 ± 3.31	4.89 ± 4.29	4.25 ± 4.05	0.344
Depression	4.17 ± 4.25	6.43 ± 5.38	4.96 ± 4.84	0.029
Sleep quality	4.37 ± 2.14	4.89 ± 2.46	3.94 ± 2.02	0.028