Alerting effects of light in healthy individuals: a systematic review and meta-analysis  

作　　者：Yi-Man Mu Xiao-Dan Huang Sui Zhu Zheng-Fang Hu Kwok-Fai So Chao-Ran Ren Qian Tao 

机构地区：[1]Department of Public Health and Preventive Medicine,School of Basic Medicine,Jinan University,Guangzhou,Guangdong Province,China [2]Division of Medical Psychology and Behavior Science,School of Basic Medicine,Jinan University,Guangzhou,Guangdong Province,China [3]Guangdong-Hongkong-Macao Institute of CNS Regeneration,Ministry of Education CNS Regeneration Collaborative Joint Laboratory,Jinan University,Guangzhou,Guangdong Province,China [4]Guangzhou Regenerative Medicine and Health Guangdong Laboratory,Guangzhou,Guangdong Province,China [5]Center for Brain Science and Brain-Inspired Intelligence,Guangdong-Hong Kong-Macao Greater Bay Area,Guangzhou,Guangdong Province,China [6]Neuroscience and Neurorehabilitation Institute,University of Health and Rehabilitation Science,Qingdao,Shandong Province,China [7]Co-innovation Center of Neuroregeneration,Nantong University,Nantong,Jiangsu Province,China

出　　处：《Neural Regeneration Research》2022年第9期1929-1936,共8页中国神经再生研究（英文版）

基　　金：supported by the National Natural Science Foundation of China,No.82172530(to QT);Science and Technology Program of Guangdong,No.2018B030334001(to CRR);Guangzhou Science and Technology Project,No.202007030012(to QT).

摘　　要：Light plays an essential role in psychobiological and psychophysiological processes,such as alertness.The alerting effect is influenced by light characteristics and the timing of interventions.This meta-analysis is the first to systematically review the effect of light intervention on alertness and to discuss the optimal protocol for light intervention.In this meta-analysis,registered at PROSPERO(Registration ID:CRD42020181485),we conducted a systematic search of the Web of Science,PubMed,and PsycINFO databases for studies published in English prior to August 2021.The outcomes included both subjective and objective alertness.Subgroup analyses considered a variety of factors,such as wavelength,correlated color temperature(CCT),light illuminance,and timing of interventions(daytime,night-time,or all day).Twenty-seven crossover studies and two parallel-group studies were included in this meta-analysis,with a total of 1210 healthy participants(636(52%)male,mean age 25.62 years).The results revealed that light intervention had a positive effect on both subjective alertness(standardized mean difference(SMD)=-0.28,95%confidence interval(CI):-0.49 to-0.06,P=0.01)and objective alertness in healthy subjects(SMD=-0.34,95%CI:-0.68 to-0.01,P=0.04).The subgroup analysis revealed that cold light was better than warm light in improving subjective alertness(SMD=-0.37,95%CI:-0.65 to-0.10,P=0.007,I2=26%)and objective alertness(SMD=-0.36,95%CI:-0.66 to-0.07,P=0.02,I2=0).Both daytime(SMD=-0.22,95%CI:-0.37 to-0.07,P=0.005,I2=74%)and night-time(SMD=-0.32,95%CI:-0.61 to-0.02,P=0.04,I2=0)light exposure improved subjective alertness.The results of this meta-analysis and systematic review indicate that light exposure is associated with significant improvement in subjective and objective alertness.In addition,light exposure with a higher CCT was more effective in improving alertness than light exposure with a lower CCT.Our results also suggest that both daytime and night-time light exposure can improve subjective alertness.

关 键 词：correlated color temperature ILLUMINANCE LIGHT META-ANALYSIS objective alertness subjective alertness time of light intervention wavelength 

分 类 号：B845[哲学宗教—心理学]