The Valued Life Activities Scale (VLAs): linguistic validation, cultural adaptation and psychometric testing in people with rheumatic and musculoskeletal diseases in the UK

Prior, Y.; Tennant, A.; Tyson, S.; Hammond, A.

doi:10.1186/s12891-020-03409-9

Table 4 Rasch Analysis of Various Versions of the Scale by Condition

From: The Valued Life Activities Scale (VLAs): linguistic validation, cultural adaptation and psychometric testing in people with rheumatic and musculoskeletal diseases in the UK

	Condition and number of items	Chi- Square^a	Df	P	Residual Item		Residual Person		PSI Reliability	% tests > 5%	95%CI	N
					Mean	SD	Mean	SD
1	Ankylosing Spondylitis- 33	129.3	66	< 0.001	−0.5876	1.6027	−0.3703	1.0239	0.93	8.02	4.7–11.4	165
2	AS-25	54.0	50	0.324	− 0.4318	1.1425	− 0.3715	1.1252	0.92	7.64	4.2–11.1	165
3	AS-14	24.0	28	0.684	−0.3933	1.3061	− 0.4036	1.0915	0.90	5.73	2.3–9.1	165
4	Rheumatoid Arthritis-33	315.3	165	< 0.001	−0.3128	2.0134	−0.2709	1.0995	0.95	6.67	4.3–9.5	336
5	RA-25	214.2	200	0.233	−0.2082	1.5988	−0.3244	1.1197	0.95	10.64	8.3–13.0	336
6	RA-14	141.5	112	0.031	−0.2118	1.7771	−0.4067	1.1493	0.92	8.51	6.2–10.9	336
7	Chronic Pain −33	210.49	132	< 0.001	−0.2716	1.6226	−0.2152	1.2471	0.96	8.65	5.5–11.8	194
8	CP-25	121.7	100	0.069	−0.2432	1.3791	−0.2654	1.2142	0.96	9.73	6.6–12.9	194
9	CP-14	77.1	56	0.032	−0.1707	1.3792	−0.2721	1.1337	0.93	10.38	7.2–13.5	194
10	Chronic Hand/Upper Limb-33	145.9	66	< 0.001	−0.2638	1.7283	−0.2785	0.9902	0.91	7.95	4.5–11.4	157
11	CH-25	76.0	50	0.010	−0.1936	1.4952	− 0.3153	1.0373	0.91	8.61	5.1–12.1	157
12	CH-14	44.4	28	0.026	−0.1760	1.5444	−0.2875	0.8676	0.88	9.15	5.7–12.6	157
13	Osteoarthritis-33	156.4	99	< 0.001	−0.3829	1.4713	−0.2158	0.8122	0.94	10.92	7.7–14.2	184
14	OA-25	94.5	75	0.063	−0.3394	1.1947	−0.2598	0.8926	0.94	12..07	8.8–15.3	184
15	OA-14	52.3	42	0.133	−0.3406	1.1186	−0.2979	0.9932	0.91	12.07	8.8–15.3	184
16	Systemic Lupus −33	201.5	99	< 0.001	− 0.2439	1.7943	−0.1998	1.1412	0.94	6.17	2.8–9.5	164
17	SLE-25	148.7	75	< 0.001	−0.3171	1.4556	− 0.2224	1.0881	0.94	9.92	6.5–13.2	164
18	SLE-14	67.5	42	0.007	−0.2797	1.3644	−0.3106	1.1546	0.91	10.43	7.1–13.8	164
19	Systemic Sclerosis-33	214.7	99	< 0.001	−0.2154	1.7710	−0.2079	1.0446	0.91	6.21	2.7–9.8	170
20	SS-25	88.4	75	0.139	−0.1269	1.4387	−0.2573	1.0479	0.91	6.45	3.0–9.9	170
21	SS-14	45.7	42	0.321	−0.1567	1.2816	−0.3223	1.0401	0.87	8.43	5.1–11.7	170
22	Primary Sjogren’s-33	255.8	99	< 0.001	−0.3904	1.7979	−0.2317	1.1495	0.90	7.88	4.5–11.2	171
23	PS-25	138.8	75	< 0.001	−0.2100	1.2663	−0.3023	1.1632	0.90	4.85	1.5–8.2	171
24	PS-14	50.5	42	0.173	−0.1771	1.1396	−0.4102	1.1496	0.87	6.21	2.8–9.6	171
	Ideal Values			> 0.05^a		< 1.4		< 1.4	> 0.70	< 5.0	LCI < 5.0

^aBonferroni Adjusted (for 33 & 25 items fit is 0.002; for 14 items is 0.004)

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