Table 2.

Rasch Crosswalk Table.

FIM® observed score	FIM® logits	SCIM III logits	SCIM III observed score	FIM® observed score	FIM® logits	SCIM III logits	SCIM III observed score
11	−4.45	−5.47	0	50	−.02	−.01	28
11	−4.45	−4.28	1	51	.03		28.5
12	−3.51	−3.59	2	52	.09	.07	29
13	−3.05	−3.18	3	53	.14	.15	30
14	−2.80	−2.87	4	54	.20	.23	31
15	−2.61	−2.61	5	55	.27		31.5
16	−2.47	−2.40	6	56	.33	.31	32
17	−2.34	−2.40	6	57	.40	.39	33
18	−2.22	−2.20	7	58	.48	.48	34
19	−2.11	−2.03	8	59	.56	.56	35
20	−2.02	−2.03	8	60	.65	.65	36
21	−1.92	−1.87	9	61	.75	.74	37
22	−1.83	−1.87	9	62	.85	.83	38
23	−1.74	−1.73	10	63	.97	.93	39
24	−1.66	−1.60	11	63	.97	1.02	40
25	−1.58	−1.60	11	64	1.10	1.10	41
26	−1.49	−1.47	12	65	1.24	1.19	42
27	−1.41		12.5	65	1.24	1.27	43
28	−1.34	−1.35	13	66	1.38	1.35	44
29	−1.26	−1.24	14	66	1.38	1.43	45
30	−1.18	−1.14	15	67	1.53	1.50	46
31	−1.11	−1.14	15	67	1.53	1.57	47
32	−1.04	−1.03	16	68	1.68	1.64	48
33	−.97	−.94	17	68	1.68	1.71	49
34	−.90	−.94	17	69	1.83	1.78	50
35	−.84	−.84	18	69	1.83	1.85	51
36	−.78	−.75	19	70	1.99	1.92	52
37	−.71	−.75	19	70	1.99	2.00	53
38	−.66	−.66	20	70	1.99	2.07	54
39	−.60	−.57	21	71	2.16	2.15	55
39.5		−.57	21	71	2.16	2.23	56
40	−.54	−.57	21	72	2.36	2.32	57
41	−.49	−.49	22	72	2.36	2.42	58
42	−.44	−.41	23	73	2.60	2.53	59
42.5		−.41	23	73	2.60	2.66	60
43	−.38	−.41	23	74	2.93	2.81	61
44	−.33	−.32	24	74	2.93	3.02	62
45	−.28		24.5	75	3.40	3.33	63
46	−.23	−.24	25	76	4.19	3.95	64
47	−.18	−.16	26	77	5.50	5.14	65
48	−.13	−.16	26
49	−.08	−.09	27

For whole number conversions where only one option is available, the conversion is bidirectional (e.g., FIM® 12 = SCIM III 2). In cases with a “.5,” the conversion is unidirectional (whole number to .5 number, e.g., SCIM III of 21 = FIM® of 39.5). In some cases, multiple scores link to the same score in the other measure (a FIM® score of 47 and 48 = SCIM III of 26), where the correct reverse link is bolded (e.g., a SCIM III score of 26 = FIM® of 47).

Abbreviations: FIM®, Functional Independence Measure; SCIM III, Spinal Cord Independence Measure III.