Table 4 Descriptive statistics and discriminant validity of the Depression Anxiety Stress Scale 21 and its shortened versions among women with chronic pelvic pain.

From: Psychometric evaluation of the Depression Anxiety Stress Scale 8 among women with chronic non-cancer pelvic pain

DASS versions

Whole sample

(N = 214)

Mann Whitney test 

z

Cluster 1

(n = 141)

Cluster 2

(n = 73)

Mann Whitney test

z

MD (IQR)

MD (IQR)

MD (IQR)

DASS-21

11.5 (6.0–23.8)

2247.5

− 5.49

7.0 (4.0–11.8)

29.5 (23.0–36.8)

210.0

− 11.43

Depression

2.0 (1.0–7.0)

2495.5

− 5.08

1.0 (0–3.0)

9.0 (5.0–14.0)

1041.0

− 9.65

Anxiety

3.0 (1.0–7.0)

2482.0

− 5.11

1.0 (0–3.0)

8.0 (6.0–11.0)

728.0

− 10.39

Stress

6.0 (3.0–11.0)

2641.0

− 4.48

4.0 (2.0–6.0)

12.0 (10.0–16.0)

436.5

− 10.91

DASS-12

7.0 (3.0–13.3)

2320.0

− 5.48

4.0 (2.0–7.0)

17.0 (13.0–21.0)

397.0

− 11.08

Depression

1.0 (1.0–4.0)

2266.5

− 5.80

0 (0–1.0)

5.0 (3.0–8.5)

1082.0

− 9.77

Anxiety

2.0 (0–4.0)

2842.0

− 4.24

1.0 (0–2.0)

4.0 (3.0–6.0)

1514.5

− 8.63

Stress

4.0 (2.0–7.0)

2849.5

− 4.16

2.0 (1.0–4.0)

8.0 (6.0–9.5)

856.0

− 10.05

DASS-8

4.0 (1.0–8.0)

2018.0

− 6.27

2.0 (1.0–3.0)

12.0 (8.0–15.0)

36.0

− 11.95

Depression

1.0 (0–3.0)

2346.5

− 5.60

0 (0–1.0)

4.0 (2.0–6.0)

1214.0

− 9.47

Anxiety

1.0 (0–3.0)

2521.0

− 5.21

0 (0–1.0)

4.0 (3.0–6.0)

674.0

− 10.93

Stress

2.0 (1.0–3.0)

2447.0

− 5.26

1.0 (0–2.0)

4.0 (3.0–5.0)

364.0

− 11.37

  1. DASS: Depression Anxiety Stress Scale, MD: median, IQR: interquartile range, U: Mann Whitney U test, p values were all significant at 0.001 level. For the DASS-21 (N = 212).