Table 2 Symptoms of orthostatic intolerance
CFS patients | Healthy controls | p-value | |
|---|---|---|---|
Dizzy when rising from supine or sitting position - no. (%) | |||
No | 6 (21) | 29 (81) | < 0.001 |
Yes | 23 (79) | 7 (19) | |
Dizzy after eating a big meal - no. (%) | |||
No | 26 (93) | 35 (97) | 0.577 |
Yes | 2 (7) | 1 (3) | |
Dizzy after standing upright for a long time - no. (%) | |||
No | 10 (35) | 29 (81) | < 0.001 |
Yes | 19 (66) | 7 (19) | |
Dizzy during light exercise - no. (%) | |||
No | 10 (35) | 35 (97) | < 0.001 |
Yes | 19 (66) | 1 (3) | |
Dizzy during a hot bath or shower - no. (%) | |||
No | 13 (45) | 31 (86) | < 0.001 |
Yes | 16 (55) | 5 (14) | |
Dizzy when seeing blood - no. (%) | |||
No | 27 (93) | 32 (89) | 0.684 |
Yes | 2 (7) | 4 (11) | |
Dizzy while urinating - no. (%) | |||
No | 28 (97) | 35 (100) | 0.453 |
Yes | 1 (3) | 0 (0) | |
Orthostatic intolerance, total score – mean (range) | 3.6 (7) | 0.9 (4) | < 0.001 |