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Demographic characteristics
| Cases (n = 305) | Controls (n = 321) | p-value | |
| Sex | 166 males | 206 males | <.0001* |
| 139 females | 115 females | ||
| Average age | 67 ± 9 years | 65 ± 9 years | 0.0131** |
| Average age of onset | 60 ± 10 years | NA |
* based on Fisher's exact test
** based on Student's t-test
