Relationship between weakness and phase angle in advanced cancer patients with fatigue

Objective

This study aims to determine the relationship between weakness and bioimpedance analysis (BIA)-derived phase angle in a population of untreated cancer patients with fatigue.

Methods

We prospectively evaluated 41 treatment-naive cancer patients of several origins that presented with performance status 1–2, weight loss >5 % in the last 6 months, and Fatigue Numeral Scale score >4. Weakness was considered a physical component of the multidimensional fatigue syndrome and was evaluated through several parameters utilizing hand grip strength technique by dinamometry. The same assessment was also performed on a healthy control population (n?=?20). BIA-derived phase angle was also determined by BIA.

Results

Compared to healthy controls, cancer patients exhibited significant differences in all the parameters: median fatigue was 6 (range 5–9), evaluated maximal strength mean was 27?±?10.71 vs. 42?±?10.74 kg (p?p?r?=?0.43, p?=?0.03) for head and neck cancer patients, and in non-small cell lung cancer patients, grip work correlated significantly with normal or decreased phase angle (r?=?0.85), p?=?0.006 (Spearman Rank Correlation).

Conclusions

Weakness could be correlated with normal or decreased phase angle in a population with ambulatory advanced cancer with fatigue naive of treatment. We also found a significant relationship between median phase angle score and endurance muscle with percentage of weight loss in the subpopulation of patients with head and neck carcinoma.