San Diego State University & University of California San Diego, Joint Doctoral Program in Clinical Psychology, San Diego, CA 92093-0804, United States.
Biol Psychol. 2012 Jan;89(1):34-8. doi: 10.1016/j.biopsycho.2011.09.002. Epub 2011 Sep 17.
African Americans have been consistently shown to have less deep (slow wave sleep; SWS) and more light (Stages 1 and 2) sleep than Caucasian Americans. This paper explored whether discrimination, a stressor that uniquely impacts certain ethnic groups, contributes to differences in sleep architecture. The sleep of 164 African and Caucasian Americans was examined with laboratory based polysomnography (PSG). Experiences of perceived discrimination (The Scale of Ethnic Experience) and sociodemographic factors were also assessed. After adjusting for age, body mass index (BMI), socioeconomic status (SES) and smoking status, African Americans slept approximately 4.5% more total sleep time (TST) in Stage 2 sleep and 4.7% less TST in SWS than Caucasian Americans (ps<.05). Perceived discrimination was a partial mediator of ethnic differences in sleep architecture. Individuals who reported experiencing more discrimination slept more time in Stage 2 and less time in SWS (ps<.05). Results suggest that the impact of stress related to ethnic group membership plays a part in explaining differences in sleep architecture.
非裔美国人的深度睡眠（慢波睡眠；SWS）时间比白种人少，而浅度睡眠（1 期和 2 期）时间更多。本研究旨在探讨歧视这种只影响特定种族群体的压力源是否会导致睡眠结构的差异。通过实验室多导睡眠图（PSG）检查了 164 名非裔和白种美国人的睡眠情况。还评估了感知到的歧视经历（种族经验量表）和社会人口统计学因素。在调整年龄、体重指数（BMI）、社会经济地位（SES）和吸烟状况后，非裔美国人在 2 期睡眠中总共多睡了约 4.5%，在 SWS 中少睡了 4.7%（p<.05）。感知到的歧视是睡眠结构种族差异的部分中介因素。报告经历更多歧视的个体在 2 期睡眠中睡眠时间更长，在 SWS 中睡眠时间更短（p<.05）。结果表明，与种族群体成员身份相关的压力的影响在解释睡眠结构差异方面起着一定的作用。
