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Characteristics of study populations.
| Cases | Controls | ||||
|---|---|---|---|---|---|
| Individuals | Male (%) | Mean age diagnosis | Individuals | Male (%) | |
| Discovery samples | |||||
| Sweden (age data for 1,855) | 2,338 | 56.8 | 69.1 | 11,971 | 47.8 |
| Iceland, MM + MGUS (age for 137/944) | 1,542 | 50.7 | 67.0 | 313,882 | 51.2 |
| Iceland, MM (age for 457/598) | 598 | 52.8 | 70.0 | 237,480 | 51.1 |
| Denmark | 940 | 59.4 | n/a | 91,744 | 51.0 |
| Norway | 500 | 60.0 | n/a | 4,696 | 53.9 |
| Follow-up samples | |||||
| Sweden | 473 | 62.2 | 69.4 | 3,430 | 45.7 |
