Towards personalized fluid monitoring in haemodialysis patients: thoracic bioimpedance signal shows strong correlation with fluid changes, a cohort study

Table 5 Median coefficient of determination R²of the correlation between relative bioZ_R + Xchanges at 8 kHz and UFV according to comorbidities that can influence the thoracic congestion

Comorbidity	Median R²
no COPD and no heart failure^a (n = 33)	0.981 [0.859–0.935]
COPD or heart failure (n = 23)	0.982 [0.935–0.994]
heart failure (n = 13)	0.979 [0.887–0.992]
no heart failure (n = 41)	0.982 [0.914–0.993]
COPD (n = 6)	0.988 [0.973–0.997]
no COPD (n = 48)	0.980 [0.858–0.993]

bioZ_R resistance; bioZ_X reactance; COPD chronic obstructive pulmonary disease
^a Heart failure includes: dilated cardiomyopathy, systolic dysfunction, diastolic dysfunction, left or right sided heart failure

ISSN: 1471-2369