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Rates of Normal and Different Abnormal Standing Tests
| CFS | Controls | |
| Normal | 30 | 28 |
| Orthostatic tachycardia (OT) alone | 5 | 1 |
| Orthostatic hypertension (HT) alone | 9 | 4 |
| Orthostatic hypertension (HT) plus OT | 1 | 0 |
| Orthostatic hypotension (ht) alone | 4 | 1 |
| Orthostatic hypocapnia alone | 11 | 0 |
| Orthostatic hypocapnia plus OT | 0 | 1 |
| Orthostatic hypocapnia plus HT | 1 | 0 |
| Orthostatic hypocapnia plus HT plus OT | 1 | 0 |
| Total Normal/Abnormal | 30/32 | 28/7 |
