The area under curve of the ROC analysis to discriminate participants with and those without sarcopenia was 0.65 (95% CI, 0.54-0.75) for TNF-α, 0.74 (95% CI, 0.65-0.84) for IL-1β, 0.80 (95% CI, 0.71-0.88) for IL-6 and 0.55 (95% CI, 0.44-0.66) for IL-15 (Figure 5). The gene discussed is IL1B; the disease is sarcopenia.