Validation of the Neurological Fatigue Index for stroke (NFI-Stroke)

Table 4 Raw score to interval scale conversion table for the scales

Raw	Summary	Physical	Cognitive
Score	Scale	Scale	Scale
0	0.00	0.00	0.00
1	2.34	1.97	1.46
2	4.05	3.43	2.69
3	5.29	4.51	3.73
4	6.31	5.42	4.70
5	7.22	6.24	5.60
6	8.05	7.00	6.43
7	8.83	7.73	7.21
8	9.59	8.45	7.98
9	10.32	9.16	8.78
10	11.05	9.88	9.65
11	11.77	10.61	10.71
12	12.49	11.35	12.00
13	13.22	12.13
14	13.96	12.94
15	14.70	13.78
16	15.46	14.65
17	16.24	15.53
18	17.03	16.41
19	17.83	17.29
20	18.64	18.21
21	19.44	19.21
22	20.25	20.38
23	21.06	21.93
24	21.89	24.00
25	22.75
26	23.67
27	24.71
28	25.95
29	27.66
30	30.00

N.B. The conversions only remain valid if there are no missing data. The transformation can only occur when data are complete because, for example, a score of say 6 from complete data is not the same as a score of 6 from incomplete data. The latter is likely to represent a higher level of the attribute being measured.

ISSN: 1477-7525