Fig 1.
ImageJ delineation of L3 and masticatory muscles with the following threshold setting: −29 to +150 Hounsfield units.
Both images have a clinical soft tissue window setting with a 350-HU width and a 40-HU level. (A) Mandibular notch–level masseter and pterygoid muscle delineations. (B) L3-level muscle CSA delineations.
Table 1.
Baseline demographics of the patients with trauma and head and neck cancer.
Table 2.
Comparison between skeletal muscle index determined by manual delineation and threshold selection on L3 and masticatory muscle.
Table 3.
Univariate and multivariate regression analysis.
Fig 2.
Analysis of L3-SMI estimates obtained using the M-SMI only and using the multivariate model.
A significant correlation was observed between the L3-SMI measurements and predictions in (A) the univariate model and (B) the multivariate model. Bland–Altman plots exhibited reasonable agreement in the (C) univariate and (D) multivariate models. L3 = third lumbar vertebra; M-SMI = masticatory skeletal muscle index; SD = standard deviation; SMI = skeletal muscle index.
Table 4.
Clinicopathological characteristics in patients with and without sarcopenia (n = 102).
Table 5.
Cox logistic regression analysis of independent predictors of sarcopenia.