Table 3. Questionnaire Data.

Questionnaire	Control (10)	Non-neuropathic POTS (15)	Neuropathic POTS (9)
Chalder fatigue scale	12.5±3.7	24.2±7.2*	22.2±9.4*
Chalder physical	7.0±2.6	15.4±4.5*	14.3±6.3*
Chalder mental	5.5±1.4	9.0±3.1*	8.0±3.3*
Krupps fatigue scale	2.0±0.4	4.8±1.2*	4.1±1.5*
Orthostatic Intolerance Symptom Assessment	1.3±1.9	28.5±14.7*	29.3±12.6*
Orthostatic Intolerance Disability Assessment Scale	0.5±0.8	14.3±9.6*	15.7±11.9*
Hospital Anxiety and Depression Scale (HADS)	3.4±2.7	11.9±5.3*	9.7±8.1
HADS anxiety	1.5±1.3	5.5±2.3*	4.6±4.4
HADS depression	1.8±1.6	7.5±3.6*	5.1±4.1

Differences between groups measured by Kruskal-Wallis test and with Mann-Whitney pairwise testing using Bonferroni correction to define differences between groups. *= Significant difference vs. Control.