Table 1.

Clinical characteristics and serum NFL levels of participants

Abbreviations: BMI body mass index; ET essential tremor; H-Y Hoehn & Yahr; MMSE Mini-mental state examination; NA not available; NFL neurofilament light chain; PD Parkinson disease; UPDRS united Parkinson’s disease rating scale

Values are expressed as the mean ± SD

^aParameters were analyzed with analysis of variance using Bonferroni as post hoc test in the case of normal distribution of data. For variables that did not display a normal distribution, data were compared with the Kruskal-Wallis test for comparison of multiple groups, or Mann-Whitney U test for comparison of 2 groups. Sex was analyzed using χ2 test

^bDifferences were found between PD vs ET

^cDifferences were found between PD vs control