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. Author manuscript; available in PMC: 2023 Jul 19.
Published in final edited form as: Clin Auton Res. 2022 May 14;32(3):175–184. doi: 10.1007/s10286-022-00865-2

Table 2.

Univariate correlation coefficients (Spearman’s rho) for cvRMSSD and pNN50 and with participant factors (continuous variables)

Variable cvRMSSD pNN50
Age − 0.2160077 (p = 0.001682) − 0.2547 (p = 0.0002)
HRDB 0.4978859 (p < 0.001) 0.5266 (p < 0.0001)
VR 0.4599434 (p < 0.001) 0.4450 (p < 0.0001)
CASS − 0.2838831 (p < 0.001) − 0.3063 (p < 0.0001)
UPDRS − 0.1259396 (p = 0.06922) − 0.1252 (p = 0.0708)

HRDB heart rate response to deep breathing, VR valsalva ratio, CASS Composite Autonomic Severity Score, UPDRS United Parkinson’s Disease Rating Scale