Table 1.
Demographic characteristics of included studies and samples.
| Mean | Min. | Max. | Mdn. | NA% | |
|---|---|---|---|---|---|
| Year of publication | 2007 | 1991 | 2017 | 2007 | 0.0 |
| Patients (n = 3,906) | |||||
| n per sample (SD) | 44.9 (43.3) | 10.0 | 253.0 | 35.0 | 0.0 |
| Age (SD) | 61.2 (15.4) | 14.6 | 75.8 | 68.8 | 1.1 |
| Sex, % male (SD) | 38.5 (15.8) | 0.0 | 100.0 | 35.9 | 5.7 |
| Controls (n= 4,071) | |||||
| n per sample (SD) | 46.8 (42.8) | 11.0 | 270.0 | 32.0 | 0.0 |
| Age (SD) | 61.0 (15.0) | 16.0 | 74.9 | 69.1 | 1.1 |
| Sex, % male (SD) | 38.0 (15.4) | 0.0 | 100.0 | 38.0 | 4.6 |
Outliers were excluded, n, number of subjects; Mdn., median; NA% percentage of missing data on outcome level.