TABLE 1.
Clinical characteristics of subjects with and without POTS.
| POTS n = 25 | Non-POTS n = 12 | P-value | |
| Age (years)* | 14 (9–17) | 11 (9–16) | 0.136‡ |
| Female/male | 14:11 | 4:8 | 0.295† |
| BMI (kg/m2)* | 20.1 (14.7–28.2) | 19.5 (14.2–29) | 0.682‡ |
| ESS score at least 10** | 6/20 (30%) | 0/11 (0%) | 0.066† |
| RDS at least 12** | 4/20 (20%) | 1/12 (8%) | 0.623† |
| WHO-5* | 32 (8–96) | 52 (16–88) | 0.289† |
| Conners 3AI score at least 10** | 8/19 (42%) | 5/12 (42%) | 1.000† |
| Quality of life, Visual Analog Scale* | 47% (0–100%) | 60% (8–100%) | 0.518‡ |
| General health, Visual Analog Scale* | 32% (0–95%) | 60% (25–100%) | 0.101‡ |
| Sleepiness for at least 3 days a week** | 12/20 (60%) | 2/12 (17%) | 0.028† |
| Tiredness for at least 3 days a week** | 16/20 (80%) | 8/12 (67%) | 0.433† |
| Constipation at least 3 days a week** | 2/18 (11%) | 2/12 (17%) | 1.000† |
| Abdominal pain** | 9/25 (36%) | 3/12 (25%) | 0.711† |
| Limb pain** | 14/25 (56%) | 5/12 (42%) | 0.495† |
| Subject in a wheelchair** | 4/25 (16%) | 1/12 (8%) | 1.000† |
*Values are means with range. **Values are numbers of subjects with percentage. †P-values were computed with Fisher’s exact test. ‡P-values were computed with logistic regression. POTS, subjects with postural tachycardia syndrome; non-POTS, subjects without postural tachycardia syndrome; BMI, body mass index; ESS, Epworth Sleepiness Scale; RDS, Rimon’s Brief Depression Scale; WHO-5, World Health Organization–Five Well-Being Index; Conners 3AI, Conners 3AI attention-deficit hyperactivity disorder screening tool.