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. Author manuscript; available in PMC: 2018 Aug 1.
Published in final edited form as: Surgery. 2017 May 24;162(2):377–384. doi: 10.1016/j.surg.2017.03.014

Figure 5. Psoas Density is a Better Predictor of Poor Outcomes than Psoas Area.

Figure 5

a. When the cohort is grouped into interquartile ranges by HUAC, those in the sarcopenia group (IQR1) have significantly increased probability of mortality (p = 0.008), length of stay = 7 (p = 0.047), complication (p = 0.002), and dependent discharge (p = 0.03).

Decreasing density from a higher quartile increases probability of poor outcome, indicating a density-dependent effect.

b. When the cohort is grouped into interquartile ranges by PI, those in the sarcopenia group have significantly increased probability of mortality only (p = 0.008).

IQR1; 1st – 25th percentile, IQR2; 26th – 50th percentile, IQR3; 51st – 75th percentile, IQR4; 76th – 100th percentile, HUAC; Hounsfield Unit Average Calculation, PI; Psoas Index, * marks significance below a = 0.05