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BACKGROUND/AIMS: Multiple definitions of sarcopenia exist and the acceptable criterion that best predicts outcome is lacking. We estimated the prevalence of sarcopenia based on four criteria and assessed their utility in predicting mortality in cirrhotics. METHODS: In a prospective observational study, consecutive Asian patients with cirrhosis underwent testing for handgrip strength (HGS) and estimation of skeletal muscle index (SMI) using computed tomography at the third lumbar vertebra. Sarcopenia was defined based on the Western cut-off (WC; SMI < 50 cm2/m2 for men and <39 cm2/m2 for women), Asian cut-off (AC; SMI < 36.5 cm2/m2 for men and 30.2 cm2/m2 for women), European Working Group on Sarcopenia in Older People-2nd meeting (EWGSOP2) definition incorporating low HGS (<27 kg for men and <16 kg for women) with low SMI (defined by the WC), and EWGSOP2 definition with low HGS and low SMI (defined by AC). Risk factors for mortality were assessed using multivariate Cox-proportional hazards. RESULTS: We included 219 patients with cirrhosis (168 men; mean age 42.6 years) with 50.2% patients having decompensation. Alcohol was the commonest aetiology (33.3%). The prevalence of sarcopenia was highest with the WC (men: 82.1%; women: 62.7%). There was a weak concordance among all criteria (Fleiss' kappa 0.23, 95% confidence interval [CI] 0.10-0.37). Overall, 12-month survival was 86.1% (81.1-91.3%) over a median (interquartile range) follow-up of 12 (6-15) months. Ascites (hazards ratio [HR] 6.27 [95% CI 1.6-24.1]; P < 0.007) and SMI (HR 0.92 [0.85-0.98]; P = 0.021) were independent predictors of mortality. The 12-month mortality rate was higher in patients with sarcopenia, irrespective of criteria (log rank P < 0.05). Low HGS and low SMI (defined by AC) was the best for predicting mortality (HR 3.04 [1.43-6.43]; P = 0.004). CONCLUSION: A weak concordance exists amongst various diagnostic definitions of sarcopenia. Sarcopenia diagnosed by a combination of low HGS and population-specific SMI cut-off (AC) best predicts mortality.
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BACKGROUND: Liver transplantation (LT) is a game changer in cirrhosis. Poor muscle mass defined as sarcopenia may potentially upset the LT scoreboard. AIM: To assess the prevalence and impact of sarcopenia on the intraoperative and early postoperative outcomes in Indian patients undergoing LT. METHODS: Pre LT, single-slice routine computed tomography images at L3 vertebra of 115 LT recipients were analyzed, to obtain cross-sectional area of six skeletal muscles normalized for height in m2 - skeletal muscle index (SMI; cm2/m2). SMI< 52.4 in males and <38.5 in females was called sarcopenia. The intraoperative, postoperative outcome parameters and 90-day mortality were compared between sarcopenics and nonsarcopenics. RESULTS: Sarcopenia was found in 47.8% of patients [M (90.4%); age, 46.3 ± 10; BMI, 24.5 ± 4.3 kg/m2; child A:B:C = 1%:22%:77%; MELD, 20.6 ± 6.3; etiology alcohol: nonalchohol = 53%:47%; Charlson Comorbidity Index (CCI) > 3:≤3 = 56.5%:43.5%]. Sarcopenics vs. Nonsarcopenics; early postoperative complications: [sepsis, 49(89%) vs. 33(55%), P = 0.001; neurologic complications, 16(29.6%) vs. 5(8.8%), P = 0.040; Clavien-Dindo Classification ≥3-24 (43.6%):15 (25.4%),P = 0.041; ancillary parameters (days), duration of ventilation [median (range)] 1.5(1-3) vs. 1 (1-2), P = 0.021; intensive care unit (ICU) stay 12 (8-16) vs. 10 (8-12), P = 0.024; time to ambulation 9 (7-11) vs. 6 (5-7), P = 0.001; drain removal 18.7 ± 7.3 vs. 14.4 ± 6.2, P = 0.001; need for tracheostomy 5 (9%) vs. 0 (%), P = 0.017; preoperative prevalence of acute kidney injury, comorbidities and requirement for dialysis, intraoperative blood loss & inotropic support were significantly higher in sarcopenics. Ninety-day mortality was comparable between sarcopenics 5 (9.09%) and nonsarcopenics 4 (6.6%) P = 0.63. SMI (OR: 0.83; 95% CI: 0.71-0.97, P = 0.016; Acute on chronic liver failure (ACLF) presentation 12.5 (1.65-95.2), P = 0.015 and intraoperative blood loss 3.74 (0.96-14.6), P = 0.046 were predictors of 90-day mortality. CONCLUSION: Almost 50% of LT recipients had sarcopenia, who had a higher incidence of postoperative sepsis, neurological complications, longer ICU stay and ventilatory support. Low SMI, ACLF presentation, and intraoperative blood loss were the independent predictors of early mortality.
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Advancements in image-based technologies and body composition research over the past decade has led to increased understanding of the importance of muscle abnormalities, such as low muscle mass (sarcopenia), and more recently low muscle attenuation (MA), as important prognostic indicators of unfavourable outcomes in patients with cancer. Muscle abnormalities can be highly prevalent in patients with cancer (ranging between 10 and 90 %), depending on the cohort under investigation and diagnostic criteria used. Importantly, both low muscle mass and low MA have been associated with poorer tolerance to chemotherapy, increased risk of post-operative infectious and non-infectious complications, increased length of hospital stay and poorer survival in patients with cancer. Studies have shown that systemic antineoplastic treatment can exacerbate losses in muscle mass and MA, with reported loss of skeletal muscle between 3 and 5 % per 100 d, which are increased exponentially with progressive disease and proximity to death. At present, no effective medical intervention to improve muscle mass and MA exists. Most research to date has focused on treating muscle depletion as part of the cachexia syndrome using nutritional, exercise and pharmacological interventions; however, these single-agent therapies have not provided promising results. Rehabilitation care to modify body composition, either increasing muscle mass and/or MA should be conducted, and its respective impact on oncology outcomes explored. Although the optimal timing and treatment strategy for preventing or delaying the development of muscle abnormalities are yet to be determined, multimodal interventions initiated early in the disease trajectory appear to hold the most promise.