Intramuscular fat content and the risk of peritonitis in peritoneal dialysis patients.
IMAT% may be an independent predictor of peritonitis-free survival and peritonitis rate in peritoneal dialysis patients, but further studies are needed to confirm these findings.
Where it sits
this study against the rest of the follistatin-344 corpusSummary and findings
This study measured the relationship between intermuscular adipose tissue percentage (IMAT%) and peritonitis outcomes in 86 incident peritoneal dialysis patients. The findings indicated that IMAT% was independently associated with peritonitis-free survival and peritonitis rate. No associations were found between total muscle area or IMAT% with patient survival or hospitalization rate.
Abstract
<h4>Background</h4>Sarcopenia is a common and serious complication of dialysis patients. In addition to the reduction in total muscle mass, fat infiltration of skeletal muscle as represented by the percentage of intermuscular adipose tissue (IMAT%) affects muscle quality and may have prognostic implications.<h4>Methods</h4>We investigated 86 incident peritoneal dialysis (PD) patients. Their total muscle area, skeletal muscle index and IMAT% at the level of third lumbar vertebra (L3) was measured by computer tomography. The relation with functional assessment, bioimpedance spectroscopy (BIS) parameters, survival and peritonitis rate were analyzed.<h4>Results</h4>L3 total muscle area and IMAT% had opposite but both significant correlation with functional scores (Morse Fall Scale and Norton Scale) and lean tissue mass measured by BIS, but IMAT% did not have correlation with adipose tissue mass by BIS. IMAT%, but not total muscle area, was independently associated with peritonitis-free survival (adjusted hazard ratio 1.084, 95% confidence interval (CI) 1.027 to 1.144, <i>P</i> = .004) and peritonitis rate (adjusted β = 1.091, 95% CI 1.032 to 1.155, <i>P</i> = .002). Neither total muscle area nor IMAT% was associated with patient survival or hospitalization rate.<h4>Conclusion</h4>IMAT% is an independent predictor of peritonitis-free survival and peritonitis rate in incident PD patients. Further studies are needed to validate our results and to develop convenient non-invasive methods for the assessment of IMAT%.