Table 2 Questionnaire data for all participants. Unless otherwise indicated data are number (%) or median (interquartile range)

Specific Necessity

4.00 (3.80–4.20)

4.00 (4.00–4.00)

0.833^c

Specific Concern

3.50 (2.83–4.00)

4.00 (3.83–4.00)

<0.001^c

NCD

0.33 (0.00–1.10)

0.00 (0.00–0.17)

<0.001^c

General Overuse

2.67 (2.00–3.33)

3.33 (3.00–4.00)

<0.001^c

General Harm

2.40 (2.00–3.00)

3.60 (3.00–4.00)

<0.001^c

SIMS action and usage

9 (7–9)

8 (6–9)

0.006^c

SIMS potential problems

6 (5–8)

6 (4–8)

0.060^c

HAQ

1.25 (1–1.38)

1.25 (1–3)

0.927^c

Identity

6 (5–8)

6 (5–7)

0.851^c

Timeline

24 (23–27)

24 (22–25)

<0.001^c

Consequences

22 (18–24)

22 (19–24)

0.794^c

Personal control

20 (17–23)

19 (17–23)

0.626^c

Treatment control

16 (14–18)

16 (15–18)

0.914^c

Illness coherence

18 (14–20)

15 (11–20)

0.041^c

Timeline cyclical

15 (14–16)

16 (14–16)

0.017^c

Emotional representation

22 (18–24)

24 (22–24)

0.004^c