Table 2.

Correlation between total and sub-domain scores in the German and English COMPASS 31 versions and Cronbach alpha coefficients of both COMPASS 31 versions assessed in 40 study participants

Domain	Correlation between German and English COMPASS 31 scores		Cronbach alpha coefficients for all 31 questions and the six sets of sub-domain questions
	Correlation coefficient	P-value	German version	US English version
Total scores	0.934 a	< 0.001	0.881	0.865
Orthostatic intolerance	0.919 a	< 0.001	0.907	0.895
Vasomotor	0.900 b	< 0.001	0.901	0.920
Secretomotor	0.724 b	< 0.001	0.676	0.536
Gastrointestinal	0.896 a	< 0.001	0.775	0.791
Bladder	0.760 b	< 0.001	0.850	0.875
Pupillomotor	0.757 a	< 0.001	0.855	0.833

a = Pearson’s correlation, b = Spearman’s rank correlation

COMPASS 31 Composite Autonomic Symptom Score 31