In the logistic regression analysis performed considering chronic sarcopenia and reverted sarcopenia groups, main factors associated to sarcopenia reversion were the previous Barthel index (OR 0.95, 95% CI 0.90–0.99), hand-grip strength (OR 0.75, 95% CI 0.57–0.97) and SMI (OR 0.05, 95% CI 0.005–0.63), MNA-SF (OR 0.57, 95% CI 0.34–0.96) and CRP (OR 0.96, 95% CI 0.93–0.99). The gene discussed is CRP; the disease is sarcopenia.