Translation, data quality, reliability, validity and responsiveness of the Norwegian version of the Effective Musculoskeletal Consumer Scale (EC-17)

Bente Hamnes; Andrew Garratt; Ingvild Kjeken; Elizabeth Kristjansson; Kåre B Hagen

doi:10.1186/1471-2474-11-21

Table 2 EC-17 item ^a means (sd), frequencies, component loadings and item-total correlation (n = 116)

From: Translation, data quality, reliability, validity and responsiveness of the Norwegian version of the Effective Musculoskeletal Consumer Scale (EC-17)

Scale/Item	Mean (sd)	Never	Rarely	Sometimes	Usually	Always	Component loading^b	Item-total correlation
EC-17 total scores ^c:	61.27 (16.88)
1. I know who can help me judge the quality of the information I receive about my disease	2.41 (1.00)	9.5	44.8	26.7	14.7	4.3	0.69	0.65
2. I understand the information I receive about my disease	2.85 (0.75)	12.1	68.1	15.5	1.7	2.6	0.66	0.62
3. I know how to adapt general health information to my own situation	2.47 (0.84)	4.3	54.3	28.4	10.3	2.6	0.78	0.75
4. I can be clear about what is important in my life when I make decisions about my disease	2.57 (0.85)	8.6	52.6	27.6	9.5	1.7	0.74	0.69
5. I can weigh the pros and cons of a decision about my disease	2.67 (0.68)	6.9	57.8	31.9	2.6	0.9	0.68	0.63
6. I can set realistic goals about the management of my disease	2.47 (0.80)	3.4	52.6	33.6	7.8	2.6	0.67	0.62
7. I can express my concerns well to health care providers	2.65 (0.98)	16.4	48.3	22.4	9.5	3.4	0.77	0.74
8. I know how to ask good questions about my health and my disease	2.36 (0.95)	4.3	52.6	21.6	18.1	3.4	0.85	0.82
9. I have built an open and trusting relationship, based on mutual respect, with my health care providers	2.80 (1.01)	22.4	50.9	15.5	6.9	4.3	0.72	0.67
10. I am able to play the role I want to in my health care team	2.52 (0.96)	10.3	50.0	24.1	12.1	3.4	0.64	0.60
11. I know who to work with to meet my health needs	2.46 (0.98)	8.6	50.9	22.4	13.8	4.3	0.82	0.79
12. I can be assertive to get what I need to meet my health needs	2.02 (1.09)	6.9	32.8	26.7	25.9	8.6	0.73	0.69
13. I feel a sense of control over my disease	2.22 (0.92)	3.4	40.5	36.2	14.7	5.2	0.64	0.59
14. I feel confident in making decisions about my health	2.45 (0.91)	8.6	44.0	34.5	9.5	3.4	0.80	0.76
15. I can negotiate with others about what we need to do to manage my disease	2.28 (0.93)	2.6	46.6	32.8	12.1	6.0	0.78	0.74
16. I can negotiate with the health care system about what to do to manage my disease	2.15 (1.02)	5.2	39.7	25.0	25.0	5.2	0.80	0.76
17. I can organize my life to act on decisions about how to manage my disease	2.33 (0.95)	6.0	44.0	31.0	14.7	4.3	0.71	0.66

^a EC-17 items use a five point scale, ranging from 0 to 4, were 0 is never and 4 is always.
^b The two EC-17 components derived from principal component analysis had eigenvalues of 9.21 and 1.36.
^c EC-17 total score is calculated by adding up the scores and converting to a scale from 0 to 100 where 100 is the best possible score.

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