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Demographic profiles of patients and controls with autoantibody assays.
| POTS (n = 36) | Controls (n = 57) | P Value | |
|---|---|---|---|
| Age (years±SD) | 26 ± 4 | 30 ± 11 | 0.02 |
| Females (n, %) | 36 (100%) | 56 (98%) | 1 |
| Family member with POTS (n, %) | 4 (11%)A | 1 (3%)B | 0.07 |
| Family member with autoimmune disease (n, %) | 12 (35%)C | 4 (7)D | 0.001 |
