Table 1.
Characteristics of studies for potential inclusion into the item bank (n=213).
| General Characteristics | Values | |
| Number of unique countries involved | 48 | |
| Number of unique PROMsa studied | 126 | |
| Sample size, n (%) | ||
|
|
< 50 | 17 (8.0) |
|
|
50 – 99 | 31 (14.6) |
|
|
100 – 199 | 64 (30.0) |
|
|
200 – 299 | 30 (14.1) |
|
|
300 – 399 | 22 (10.3) |
|
|
400 – 499 | 15 (7.0) |
|
|
> 500 | 34 (16.0) |
| Mean age in years, n (%) | ||
|
|
0 < mean age ≤ 20 | 9 (4.2) |
|
|
20 < mean age ≤ 40 | 28 (13.2) |
|
|
40 < mean age ≤ 60 | 101 (47.4) |
|
|
60 < mean age ≤ 80 | 54 (25.4) |
|
|
≥ 80 | 2 (0.9) |
|
|
Not reported b | 19 (8.9) |
| Proportion of males, n (%) | ||
|
|
< 0.2 | 15 (7.0) |
|
|
0.2 ≤ x < 0.4 | 46 (21.6) |
|
|
0.4 ≤ x < 0.6 | 77 (36.2) |
|
|
0.6 ≤ x < 0.8 | 40 (18.8) |
|
|
≥ 0.8 | 23 (10.8) |
|
|
Not reported | 12 (5.6) |
a PROMs: patient-reported outcome measures.
b Includes values in the form of median, range, or not reported.