ALB and myalgic encephalomeyelitis/chronic fatigue syndrome: Moreover, age, diabetes mellitus and cardiovascular disease were positively associated with CFS score (β = 0.08, P < 0.001; β = 0.56, P < 0.001; β = 0.51, P < 0.001; respectively) whereas serum albumin and serum creatinine were negatively associated with CFS score (β = −0.04, P = 0.001; β = −0.001, P = 0.01; respectively).