ALB and Parkinson disease: Smoothing curves of serum albumin levels against severe motor impairment (mHY stages ≥ 4) were plotted, after adjusting for sex, age, PD disease duration, MMSE scores, use of NSAIDs, and CRP, continuous linear association was observed (Figure 1A, Supplemental Digital Content, http://links.lww.com/MD/H148).