Enhancing rigour in the validation of patient reported outcome measures (PROMs): bridging linguistic and psychometric testing

Roberts, Gwerfyl; Roberts, Seren; Tranter, Richard; Whitaker, Rhiannon; Bedson, Emma; Tranter, Siobhan; Prys, Delyth; Owen, Heledd; Sylvestre, Yvonne

doi:10.1186/1477-7525-10-64

Table 2 Item level analysis of the BDI-II (student sample)

From: Enhancing rigour in the validation of patient reported outcome measures (PROMs): bridging linguistic and psychometric testing

Item	Mean		S.D.		% of participants reporting symptom		Item-total correlation		Weighted Kappa coefficient	Generalised McNemar
Item	Mean		S.D.		% of participants reporting symptom		Item-total correlation		Weighted Kappa coefficient	asymmetry
	Welsh	English	Welsh	English	Welsh	English	Welsh	English		p-value
1. Sadness	0.05	0.04	0.21	0.21	4.5	4.39	0.48	0.33	0.79	1
2. Pessimism	0.26	0.28	0.46	0.47	27.52	27.19	0.52	0.43	0.76	0.99
3. Past Failure	0.19	0.17	0.48	0.44	14.55	14.04	0.55	0.37	0.76	0.77
4. Loss of Pleasure	0.18	0.18	0.39	0.41	17.27	16.67	0.6	0.36	0.66	0.8
5. Guilty Feelings	0.27	0.32	0.58	0.54	22.02	28.95	0.71	0.57	0.73	0.26
6. Punishment Feelings*	0.02	0.06	0.14	0.24	1.8	6.14	0.36	0.31	0.43	0.03
7. Self-Dislike*	0.25	0.37	0.59	0.63	20	28.95	0.59	0.55	0.61	0.3
8. Self - Criticalness*	0.35	0.47	0.62	0.72	29.09	34.21	0.7	0.67	0.74	0.75
9. Suicidal Thoughts*	0.03	0.07	0.17	0.26	2.7	7.02	0.38	0.14	0.53	0.03
10. Crying	0.22	0.18	0.54	0.45	18.18	14.91	0.55	0.43	0.82	0.54
11. Agitation	0.21	0.29	0.41	0.46	20.9	28.95	0.6	0.52	0.63	0.07
12. Loss of interest	0.08	0.12	0.28	0.32	8.2	12.28	0.45	0.25	0.6	0.16
13. Indecisiveness	0.33	0.34	0.63	0.67	26.36	25.44	0.62	0.57	0.69	0.63
14. Worthlessness	0.2	0.21	0.51	0.56	14.55	14.91	0.61	0.56	0.66	0.99
15. Loss of Energy*	0.36	0.46	0.48	0.5	35.5	45.61	0.42	0.37	0.66	0.02
16. Changes in Sleeping Pattern	0.51	0.55	0.69	0.68	41.8	46.4	0.5	0.5	0.94	0.68
17. Irritability	0.23	0.28	0.42	0.49	22.7	25.44	0.59	0.51	0.63	0.73
18. Changes in Appetite	0.29	0.34	0.55	0.56	24.8	29.8	0.39	0.39	0.9	0.94
19. Concentration Difficulty	0.37	0.38	0.57	0.56	31.82	33.33	0.61	0.62	0.58	0.56
20. Tiredness or Fatigue*	0.44	0.54	0.55	0.58	41.82	50	0.57	0.56	0.72	0.6
21. Loss of interest in Sex	0.23	0.21	0.5	0.49	19.09	18.42	0.28	0.25	0.97	0.99

N = 106 for Welsh BDI-II and 112 for English BDI-II, * = Difference in mean is significant at the .05 level (paired t-test).

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ISSN: 1477-7525

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