Table 1.
Study characteristics of included articles (N=214).
| Study characteristics | Values, n (%) | |
| Sample sizea | ||
|
|
<50 | 17 (7.9) |
|
|
50-99 | 31 (14.4) |
|
|
100-199 | 62 (29.0) |
|
|
200-299 | 32 (15.0) |
|
|
300-399 | 23 (10.7) |
|
|
400-499 | 15 (7.0) |
|
|
>500 | 35 (16.4) |
| Mean age (years)a,b | ||
|
|
<20 | 9 (4.2) |
|
|
20-39 | 28 (13.1) |
|
|
40-59 | 97 (45.3) |
|
|
60-79 | 55 (25.7) |
|
|
>80 | 2 (0.9) |
| Proportion of males (%) a | ||
|
|
0-20 | 15 (7.0) |
|
|
21-40 | 47 (22.0) |
|
|
41-60 | 78 (36.4) |
|
|
61-80 | 38 (17.8) |
|
|
81-100 | 23 (10.7) |
| Mean treatment/disease durationa (years) | ||
|
|
<1 | 3 (1.4) |
|
|
1-5 | 11 (5.1) |
|
|
6-10 | 27 (12.6) |
|
|
11-15 | 16 (7.5) |
|
|
>15 | 2 (0.9) |
aSome values were not reported.
bSome values were reported as median, range, or not reported.