Table 2
Autonomic test results
| Test | MSA | PD | t Test |
|---|---|---|---|
| *Among patients with abnormal results. | |||
| MSA, multiple system atrophy; PD, Parkinson’s disease. | |||
| Deep breathing | |||
| Patients with abnormal results | 11/13 (84.6%) | 13/19 (68.4%) | NS |
| Average heart rate variation below expected* | 4.18 beats/min | 4.15 beats/min | |
| Valsalva manoeuvre | |||
| Patients with abnormal results | 5/8 (62.5%) | 14/18 (77.8%) | NS |
| Average Valsalva ratio below expected* | 0.135 | 0.131 | |
| Tilt table testing | |||
| Patients with abnormal results | 10/13 (76.9%) | 16/18 (88.8%) | NS |
| Average decrease of systolic blood pressure* | 47 mm Hg | 55 mm Hg | |
| Sudomotor axon reflex | |||
| Patients with abnormal results | 10/14 (71.4%) | 15/19 (78.9%) | NS |
| Average % of sites with low or absent sweating* | 70.7% | 62.5% | |
| Thermoregulatory sweat test | 8/8 (100%) | 8/8 (100%) | NS |
