| Germany | Finland | UK | Australia | |
| Study subjects (n) | 1454 | 5078 | 4064 | 2292 |
| Male (%) | 48.8 | 48.2 | 49.6 | 50.3 |
| Age group (%) | ||||
| 30–44 years | 38.0 | 39.9 | 44.4 | 43.0 |
| 45–59 years | 34.0 | 38.8 | 32.4 | 33.4 |
| 60+ years | 28.0 | 21.4 | 23.2 | 23.6 |
| Household income (%) | ||||
| Quartile 1 (low) | 26.9 | 24.3 | 25.4 | 30.4 |
| Quartile 2 | 25.6 | 25.1 | 25.4 | 23.9 |
| Quartile 3 | 29.1 | 25.3 | 23.3 | 18.3 |
| Quartile 4 (high) | 18.4 | 25.3 | 25.8 | 27.5 |