Table 3.
Description of the Swedish Population During the Study Period, Showing Numbers of Families With 2, 3, and 4+ Siblings and Numbers of Siblings With AF/AFl
| No. of Siblings in Family | No. of Families | Percentage of of Cases from Families* | |||||
|---|---|---|---|---|---|---|---|
| 0 Siblings With AF/AFl | 1 Sibling With AF/AFl | 2 Siblings With AF/AFl | 3+ Siblings With AF/AFl | Cases from Families With 1 Affected Sibling | Cases from amilies With 2 Affected Siblings | Cases from Families With 3+ Affected Siblings | |
| 2 | 3 179 376 | 23 972 | 1001 | NA | 92 | 8 | NA |
| 3 | 621 490 | 14 861 | 1036 | 52 | 87 | 12 | 1 |
| 4+ | 256 964 | 12 077 | 1635 | 268 | 76 | 19 | 5 |
AF/AFI indicates atrial fibrillation/atrial flutter; NA, not applicable.
*
Percentage of cases from families with 2, 3, and 4 or more siblings with 1, 2, or 3 or more affected siblings, respectively.