Table 1.
Socio-demographic and clinical characteristics of the population at baseline
| Belgium (n = 1,451) | France (n = 3,243) | Spain (n = 201) | The United Kingdom (n = 864) | Germany (n = 109) | Italy (n = 224) | Total (n = 6,092) | |
| Age: Mean (STD) | 55.43 (17.09) | 62.71 (15.28) | 24.08 (5.76) | 46.97 (10.52) | 40.08 (10.96) | 69.80 (6.78) | 57.33 (17.13) |
| Gender: Female % | 57 | 56 | 70 | 57 | 58 | 43 | 56 |
| Ethnic origin: | |||||||
| Asian: N(%) | 2 (<1) | 4 (<1) | 0 (0) | 10 (1) | 2 (2) | 0 (0) | 18 (<1) |
| Black: N(%) | 2 (<1) | 13 (<1) | 2 (1) | 6 (1) | 0 (0) | 0 (0) | 23 (<1) |
| Caucasian: N(%) | 1,443 (99) | 3,218 (99) | 197 (98) | 844 (98) | 105 (96) | 224 (100) | 6,031 (99) |
| Previous vaccination: | |||||||
| Yes: N(%) | 896 (62) | 2,106 (65) | 80 (40) | 535 (62) | 31 (28) | 207 (92) | 3,855 (63) |
| Unknown: N(%) | 18 (1) | 35 (1) | 5 (2) | 8 (1) | 5 (5) | 0 (0) | 71 (1) |