| affect all age groups | 0.43 |
| occur in 0.5 percent of… | 0.43 |
| occur in healthy people | 0.39 |
| occur in the elderly | 0.39 |
| more frequent | 0.25 |
| serious injury | 0.24 |
| fall | 0.23 |
| accompanied by tonic-cl… | 0.64 |
| accompanied by visual d… | 0.57 |
| accompanied by paresthe… | 0.57 |
| reported | 0.39 |
| reported in 3.9% | 0.25 |
| associated with sudden … | 0.25 |
| characterized by short … | 0.25 |
| difficult to diagnose | 0.24 |
| followed by reduced ven… | 0.24 |
| associated with other s… | 0.22 |
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