| vary | 0.54 |
| develop over time | 0.45 |
| feel tired | 0.36 |
| swell of foot | 0.33 |
| occur | 0.30 |
| go unnoticed | 0.22 |
| feel faint | 0.16 |
| associated with high bl… | 0.64 |
| treated | 0.38 |
| relieved | 0.38 |
| associated with other c… | 0.19 |
| difficult to manage | 0.16 |
| associated with hyperte… | 0.16 |