Development of a patient reported outcome scale for fatigue in multiple sclerosis: The Neurological Fatigue Index (NFI-MS)

Table 7 Raw score to interval scale conversion table.

Raw Score	Summary Scale	Physical Scale	Diurnal Sleep Scale	Nocturnal Sleep Scale	Cognitive Scale
0	0.00	0.00	0.00	0.00	0.00
1	2.49	1.91	1.71	2.04	1.38
2	4.26	3.33	3.03	3.53	2.58
3	5.49	4.37	4.07	4.63	3.64
4	6.48	5.24	4.97	5.55	4.62
5	7.32	6.03	5.85	6.37	5.53
6	8.07	6.75	6.72	7.12	6.36
7	8.76	7.42	7.58	7.83	7.13
8	9.42	8.09	8.46	8.52	7.89
9	10.05	8.75	9.29	9.18	8.67
10	10.65	9.42	10.09	9.85	9.54
11	11.28	10.10	10.88	10.56	10.63
12	11.91	10.81	11.63	11.31	12.00
13	12.54	11.58	12.38	12.19
14	13.20	12.38	13.16	13.38
15	13.86	13.23	14.01	15.00
16	14.55	14.14	14.99
17	15.30	15.06	16.27
18	16.05	15.99	18.00
19	16.83	16.95
20	17.64	17.93
21	18.45	18.97
22	19.29	20.22
23	20.13	21.85
24	21.03	24.00
25	21.96
26	22.98
27	24.12
28	25.53
29	27.42
30	30.00

ISSN: 1477-7525