Association of mortality and phase angle measured by different bioelectrical impedance analysis (BIA) devices.

Genton, Laurence; Herrmann, François R; Spörri, Adrian; Graf, Christophe E (2018). Association of mortality and phase angle measured by different bioelectrical impedance analysis (BIA) devices. Clinical nutrition, 37(3), pp. 1066-1069. Elsevier 10.1016/j.clnu.2017.03.023

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PURPOSE A high phase angle measured by the Nutriguard(®) bioelectrical impedance analysis device is associated with a reduced mortality risk in older people. This retrospective study aims to analyze whether this association persists with the other devices that have been used in our hospital. METHODS This study encompasses all people 65 yrs and older who underwent a phase angle measurement between 1990 and 2011 at the Geneva University Hospitals, with the RJL-101(®) (RJL Systems), Xitron 4000B(®) (Xitron Technologies), Eugedia(®) (Eugédia-Spengler) and Bio-Z(®) (Spengler). Diseases at the time of phase angle measurement were reported in the form of the Cumulative Illness Rating Scale. Date of death was retrieved until December 2012. Phase angle values were categorized into sex- and device-specific quartiles, where quartile 1 represents the lowest quartile and reference value. Cox regressions were performed to evaluate the association between phase angle quartiles and mortality. RESULTS We considered 1878 people (969 women), of whom 1151 had died. In univariate sex-specific Cox regressions, the death risk decreased progressively as the phase angle quartile measured by the Bio-Z(®) or RJL-101(®) increased. The HR (95% CI) in quartile 4 was 0.36 (0.26, 0.50) and 0.38 (0.29, 052) in women and men measured with the Bio-Z(®) (both p < 0.001), and 0.23 (0.14, 0.39) and 0.19 (0.10, 0.36) in women and men measured with the RJL-101(®) (both p < 0.001). The association between phase angle and mortality persisted when adjusted for age, body mass index or co-morbidities. The small number of deaths in people who underwent a measurement by Eugedia(®) (n = 93) or Xitron 4000B(®) (n = 56) did not allow performing multivariate Cox regressions. CONCLUSIONS Phase angle quartiles are associated with mortality in people aged ≥65 years when using the RJL-101(®) or Bio-Z device(®).

Item Type:

Journal Article (Original Article)

Division/Institute:

04 Faculty of Medicine > Pre-clinic Human Medicine > Institute of Social and Preventive Medicine (ISPM)

UniBE Contributor:

Spörri, Adrian

Subjects:

600 Technology > 610 Medicine & health
300 Social sciences, sociology & anthropology > 360 Social problems & social services

ISSN:

0261-5614

Publisher:

Elsevier

Language:

English

Submitter:

Tanya Karrer

Date Deposited:

04 Jul 2017 15:18

Last Modified:

01 May 2018 01:30

Publisher DOI:

10.1016/j.clnu.2017.03.023

PubMed ID:

28381339

Uncontrolled Keywords:

Bioimpedance Death Older people

BORIS DOI:

10.7892/boris.101319

URI:

https://boris.unibe.ch/id/eprint/101319

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