Table 2.

General characteristics of identified instruments

	All instruments (N = 44)	Generic instruments (N = 16)	Domain-specific instruments (N = 9)	Disease- and subgroup-specific instruments (N = 19)
Frequency of use (N, %)	1004 (100.0)	653 (65.0)	204 (20.3)	147 (14.7)
Number of items
Mean (SD)	37.2 (35.5)	23.3 (25.8)	66.2 (50.7)	35.1 (26.8)
Median	23	14	78	27
Range	4–143	4–100	15–143	12–131
Number of dimensions
Mean (SD)	7.6 (3.8)	6.1 (3.0)	10.8 (3.7)	7.4 (3.7)
Median	8	6	9	8
Range	2–17	3–15	8–17	2–15
Number of adapted versions (N, %)	12 (27.3)	9 (56.3)	1 (11.1)	4 (21.1)
Utility score available, Yes (N, %)	5 (11.4)	5 (31.3)	0 (0.0)	0 (0.0)

SD, standard deviation