Stress, Sleep Quality, and Academic Performance among Dental Students in Shiraz, Iran

Table 1

The mean scores of the 6 domains of the DES questionnaire.

Domains	Year of study (number)	Scores (mean ± SD)
I-Academic efficiency	4 (46)	15.50 ± 2.93
	5 (46)	16.58 ± 3.31
	6 (46)	15.10 ± 3.92
	Total (138)	15.73 ± 3.44
II-Patient treatment	4 (46)	8.47 ± 2.21
	5 (46)	9.60 ± 2.44
	6 (46)	9.60 ± 2.83
	Total (138)	9.23 ± 2.54
III-Internal beliefs	4 (46)	7.89 ± 2.70
	5 (46)	8.69 ± 3.33
	6 (46)	8.23 ± 3.50
	Total (138)	8.27 ± 3.19
IV-Academic factors	4 (46)	4.19 ± 1.61
	5 (46)	5.30 ± 1.90
	6 (46)	5.02 ± 1.65
	Total (138)	4.84 ± 1.78
V-Clinical education	4 (46)	22.95 ± 5.40
	5 (46)	25.89 ± 6.59
	6 (46)	25.15 ± 6.72
	Total (138)	24.66 ± 6.34
VI-Other items	4 (46)	8.52 ± 2.94
	5 (46)	8.56 ± 2.50
	6 (46)	7.93 ± 2.56
	Total (138)	8.34 ± 2.67
Total	4 (46)	67.54 ± 13.04
	5 (46)	74.65 ± 14.67
	6 (46)	71.06 ± 15.11
	Total (138)	71.08 ± 14.49