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Table 4 Ordinal regression analyses: clinical severity classifications for the SWEMWBS, WSAS, GAD-7 and PHQ9

From: Hearing dogs for people with severe and profound hearing loss: a wait-list design randomised controlled trial investigating their effectiveness and cost-effectiveness

 

n

Hearing dog

n

Wait-list

Odds ratioa (95% CI) p value

Short Warwick-Edinburgh Mental Well-being Scale

Severity

Low

Medium

High

 

Low

Medium

High

 

Baseline

55

23 (41.8)

28 (50.9)

4 (8.8)

57

18 (31.6)

34 (59.6)

5 (8.8)

4.20 (1.76 to 10.05)

p < 0.001

T1

55

11 (20.0)

37 (67.3)

7 (12.7)

57

21 (36.8)

36 (63.2)

0 (0.0)

Work and Social Adjustment Scale

Functional impairment

Sub-clinical

Less severe

Moderately severe or worse

 

Sub-clinical

Less severe

Moderately severe or worse

 

Baseline

55

11(20.0)

24 (43.6)

20 (36.4)

58

5 (8.6)

25 (43.1)

28 (48.3)

0.55 (0.25 to 1.20)

p = 0.133

T1

55

13 (23.6)

26 (47.3)

16 (29.1)

58

8 (13.8)

23 (39.7)

27 (46.6)

Generalised Anxiety Disorder-7 Questionnaire

Severity classification

Below cut-off

Mild

Moderate

Severe

 

Below cut-off

Mild

Moderate

Severe

 

Baseline

55

25 (45.5)

14 (25.5)

10 (18.2)

6 (10.9)

56

24 (42.9)

20 (35.7)

4 (7.1)

8 (14.3)

0.33 (0.15 to 0.71)

p = 0.005

T1

55

30 (54.5)

17 (30.9)

4 (7.3)

4 (7.3)

56

21 (37.5)

16 (28.6)

10 (17.9)

9 (16.1)

Patient Health Questionnaire-9

Severity classification

Below cut-off

Mild

Moderate

Moderately severe

Severe

 

Below cut-off

Mild

Moderate

Moderately severe

Severe

 

Baseline

56

23 (41.1)

14 (25.0)

12 (21.4)

5 (8.9)

2 (3.6)

57

30 (52.6)

14 (24.6)

4 (7.0)

6 (10.5)

3 (5.3)

0.30 (0.14 to 0.65)

p = 0.002

T1

56

31 (55.4)

13 (23.2)

7 (12.5)

3 (5.4)

2 (3.6)

57

20 (35.1)

16 (28.1)

13 (22.8)

5 (8.8)

3 (5.3)

  1. a This is a proportional odds ratio, thus, for each and every response category c, compares the people who are in categories greater than c with those in categories less than or equal to c. That is, for a one unit change in the predictor variable, the odds for cases in a category that is greater than c versus less than or equal to c are k times larger, where k is the odds ratio