BDI scale

Depression group

Mean rank

χ2 (2 df)

p

Total score

Mild

15.27

Moderate

25.66

Severe

42.24

24.08

.000

Depressed mood

Mild

18.83

Moderate

29.27

Severe

35.24

8.64

.01

Somatic manifestations

Mild

17.33

Moderate

24.66

Severe

41.76

21.06

.000

Loss of weight and appetite

Mild

21.97

Moderate

26.23

Severe

36.29

7.43

.02

Negative self-image

Mild

20.40

Moderate

24.89

Severe

39.08

12.94

.002

Negative social feelings

Mild

18.93

Moderate

29.11

Severe

35.34

8.85

.01