Descriptive characteristics of study participants.

A total sample size of N = 50 was included in the analysis. Descriptive data are presented in means (M) and standard deviations (SD). Absolute numbers of participants are given (N) and expressed as percentage (%). Abbreviations: means (M); standard deviation (SD), brain-derived neurotrophic factor (BDNF); Insomnia Severity Index (ISI); Perceived Stress Scale (PSS); restless legs syndrome (RLS), periodic limb movement (PLM).本分析共纳入样本量N=50。描述性统计数据以均值（M）与标准差（SD）的形式呈现。研究对象的绝对人数（N）已给出，并以百分比（%）形式呈现。 缩写说明：均值（M）；标准差（SD）；脑源性神经营养因子（brain-derived neurotrophic factor, BDNF）；失眠严重指数量表（Insomnia Severity Index, ISI）；知觉压力量表（Perceived Stress Scale, PSS）；不宁腿综合征（restless legs syndrome, RLS）；周期性肢体运动（periodic limb movement, PLM）。