ArticleThe Journal of frailty & aging2025
Psoas muscle density predicts elective colorectal surgical outcomes more accurately than psoas muscle area or indexed area.
Article in The Journal of frailty & aging, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 1 paper.
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Abstract
backgroundCT measurements of psoas muscle density (PMD) and area (PMA) (with or without indexing to height-squared or body-surface-area) are used interchangeably as sarcopenia measures - it is unknown which best correlates with surgical risk.
objectives1.Determine the correlation between psoas muscle density, area, and indexed area; 2.Identify which psoas measures most strongly associated with surgical outcomes
designThe University Hospital Geelong Colorectal database included all patients who underwent elective colorectal surgery from 2007 to 2014 (minimum five-years follow-up). Pre-operative CT scans were reviewed, psoas measures correlated with each other and with outcomes.
settingUniversity Hospital Geelong is a regional referral hospital in Victoria, Australia.
participantsThis database listed 552 patients, 120 were excluded as pre-operative CT-films were not accessible, leaving 432 patients included. EXPOSURE: Psoas muscle density, area, and area indexed by height-squared and body-surface-area. MEASUREMENTS: Pearson correlations investigated correlations between psoas muscle measures. Logistic regression and ROC-analysis investigated each psoas measures association with peri‑operative morbidity. Kaplan-Meier survival-analysis investigated the association of each psoas measure with long-term survival.
resultsMean age was 70.4 years, 41 % were female. Psoas muscle density correlated poorly with area (R
conclusionsPsoas muscle density and area did not correlate. Both were associated with long-term survival, but only density was associated major-complications and mortality. Indexing removed the correlation of area with long-term survival.
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