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Fig. 2 | Journal of Intensive Care

Fig. 2

From: Upper limb muscle atrophy associated with in-hospital mortality and physical function impairments in mechanically ventilated critically ill adults: a two-center prospective observational study

Fig. 2

ROC curves of biceps brachii and rectus femoris muscle atrophy for the prediction of in-hospital mortality. The number of patients were 64, 56, and 36 on days 3, 5, and 7. Biceps brachii muscle atrophy showed no discriminative power of in-hospital mortality on day 3 (p = 0.70) but showed discriminative power on days 5 (p = 0.02; sensitivity, 0.72; specificity, 0.74 at a cut-off value of − 12.0%) and 7 (p = 0.01; sensitivity, 0.60; specificity 0.95 at a cut-off value of − 19.1%). Rectus femoris muscle atrophy showed no discriminative power of in-hospital mortality on day 3 (p = 0.53) but showed discriminative power on days 5 (p = 0.02; sensitivity, 1.00; specificity 0.45 at a cut-off value of − 9.5%) and 7 (p = 0.01; sensitivity, 0.87; specificity, 0.81 at a cut-off value of − 18.3%). The cut-off value was determined by the Youden index using JMP Statistical Software version 13.1.0 (SAS Institute Inc., Cary, NC, USA)

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