Table 3

Normative measures for the disability scale across countries

Raw score (0–23)	Measure	Rescaled measure (0–100)	SE
0*	−5.86	0	1.88
1	−4.51	11	1.10
2	−3.62	19	0.84
3	−3.01	24	0.73
4	−2.52	28	0.67
5	−2.10	32	0.63
6	−1.73	35	0.60
7	−1.38	38	0.58
8	−1.05	41	0.56
9	−0.74	44	0.56
10	−0.43	46	0.55
11	−0.13	49	0.55
12	0.17	52	0.55
13	0.47	54	0.55
14	0.78	57	0.56
15	1.09	60	0.57
16	1.42	62	0.58
17	1.76	65	0.59
18	2.13	68	0.62
19	2.53	72	0.65
20	2.99	76	0.71
21	3.56	81	0.81
22	4.41	88	1.07
23*	5.72	100	1.87

Transformation of the raw scores to interval-level scores on a logit scale.
*Extreme scores measure inaccurate estimate of disability. A higher raw score indicates a higher disability. As can be seen, the 1-point difference between a raw score of 15 and 16 points is 2 on the interval scale, whereas the 1-point difference between a raw score of 1 and 2 points is 8 on the interval scale.