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| Morocco | Tunisia | Milan | Girona | ||
| N | Cases | 72 | 70 | 1693 | 312 |
| Controls | 51 | 81 | 1668 | 317 | |
| Mean Age (SD) | Cases | 56.5 (10.8) | 40.3 (10.1) | 39.4 (4.9) | 45.9 (5.9) |
| Controls | 23.0 (1.5) | 23.8 (3.4) | 39.3 (5.0) | 46.0 (5.6) | |
| % Males | Cases | 68.0 | 55.7 | 88.3 | 79.5 |
| Controls | 54.9 | 29.6 | 88.3 | 78.5 |
SD, standard deviation.
