Efficiency of Bioelectric Impedance Analysis as an Evaluation Method of Skeletal Muscle Mass After Gastrectomy

Abstract

Objective: This study measured skeletal muscle mass (SMM) in postoperative gastric cancer patients, to compare SMM to traditional postoperative assessment based on anthropomorphic measures and blood tests, and evaluated the methods of SMM measurement. Summary of Background Data: SMM, which helps to maintain general health and quality of life, is very important. Measurement of total psoas major muscle area (TPA) by computed tomography imaging has recently been reported to be a useful index of SMM. Methods: This retrospective study included 92 patients who underwent distal gastrectomy for gastric cancer. SMM was measured by TPA index (computed tomography measurement of TPA / square of height) and bioelectric impedance analysis (BIA). Patients were divided into short-term (,3 years) and long-term (3 years) postoperative follow-up groups. SMM and traditional postoperative assessment, as well as body mass index, albumin, hemoglobin, and total cholesterol, were compared between the 2 groups. The correlations between the TPA index and the SMM of BIA and traditional postoperative assessment were examined by simple regression analysis. Results: The SMM of BIA was 24.1 6 4.1 kg in the short-term and 22.0 6 4.7 kg in the longterm group (P ¼ 0.02), and TPA index was 783.4 6 166.9 mm 2 /m 2 in the short-term and 687.5 6 167.2 mm 2 /m 2 in the long-term group (P ¼ 0.01), whereas there were no significant differences in traditional postoperative assessment. On simple regression analysis, TPA index showed the strongest correlation with SMM of BIA (R ¼ 0.56).

Sex Difference in Cutoff and Prevalence of Sarcopenia among 300,090 Urban Korean Population: Association with Metabolic Syndrome

“…Second, skeletal muscle mass was measured only using BIA despite the dominance of DEXA for estimation of muscle mass for research. However, the validity and reproducibility of the device used in our study was verified [ 69 , 70 ] and correlates well with DEXA results [ 21 , 53 , 71 ]. Furthermore, BIA examinations were performed after fasting for more than 8 h, minimizing the effect of hydration.…”

Postoperative relative decrease in skeletal muscle mass as a predictor of quality of life in patients with gastric cancer

“…We measured total psoas major muscles area (TPA) between the third and fourth lumbar vertebrae (L3-L4) using an image viewer system (ShadeQuest/View C version 1; Yokogawa Medical Solutions, Tokyo, Japan). We then calculated the skeletal muscle mass index (SMI, mm 2 /m 2 ) as (right TPA + left TPA)/(height) 2 because it has been shown to correlate significantly with total skeletal muscle mass (16,17).…”