Table 3.
Comparison of Clinical Characteristics of Patients With Positive and Negative Head‐Up Tilt Table Test (n = 66)
| CRPS Patients | P Value | ||
|---|---|---|---|
| Negative HUTT, No. (%) | Positive HUTT, No. (%) | ||
| Mean age, y [SD] | 46.3 [13.2] | 37.2 [12.8] | 0.007 |
| Female gender | 32 (84.2) | 25 (89.3) | 0.55 |
| Pretest symptoms | |||
| No symptoms | 26 (68.4) | 15 (53.6) | 0.29 |
| Only presyncopal symptoms | 6 (15.8) | 4 (14.3) | |
| Any syncopal symptoms | 6 (15.8) | 9 (32.1) | |
| Mean duration CRPS, y [SD] | 6.8 [4.4] | 5.1 [3.6] | 0.1 |
| Mean pain intensity on 1–10 scale [SD] | 7.6 [1.3] | 7.7 [1.5] | 0.78 |
| Initial injury site | |||
| Upper body | 32 (84.2) | 16 (57.1) | 0.015 |
| Lower body | 6 (15.8) | 12 (42.9) | |
| Generalized to total body | 17 (44.7) | 7 (25.0) | 0.1 |
Abbreviations: CRPS, complex regional pain syndrome; HUTT, head‐up tilt table test; SD, standard deviation.