Current status of indoor light-at-night exposure during sleep among children and adolescents in Shanghai

QU Shuangxiao; YAO Chunxia; GAO Guiling; YANG Dongling; ZHENG Keyang; HUANG Shenglei; ZHANG Fengyun; LUO Chunyan

doi:10.16835/j.cnki.1000-9817.2025264

Volume 46 Issue 9

Sep. 2025

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Article Navigation > CHINESE JOURNAL OF SCHOOL HEALTH > 2025 > 46(9): 1262-1265

QU Shuangxiao, YAO Chunxia, GAO Guiling, YANG Dongling, ZHENG Keyang, HUANG Shenglei, ZHANG Fengyun, LUO Chunyan. Current status of indoor light-at-night exposure during sleep among children and adolescents in Shanghai[J]. CHINESE JOURNAL OF SCHOOL HEALTH, 2025, 46(9): 1262-1265. doi: 10.16835/j.cnki.1000-9817.2025264

Citation:

QU Shuangxiao, YAO Chunxia, GAO Guiling, YANG Dongling, ZHENG Keyang, HUANG Shenglei, ZHANG Fengyun, LUO Chunyan. Current status of indoor light-at-night exposure during sleep among children and adolescents in Shanghai[J]. CHINESE JOURNAL OF SCHOOL HEALTH, 2025, 46(9): 1262-1265. doi: 10.16835/j.cnki.1000-9817.2025264

Citation:

QU Shuangxiao, YAO Chunxia, GAO Guiling, YANG Dongling, ZHENG Keyang, HUANG Shenglei, ZHANG Fengyun, LUO Chunyan. Current status of indoor light-at-night exposure during sleep among children and adolescents in Shanghai[J]. CHINESE JOURNAL OF SCHOOL HEALTH, 2025, 46(9): 1262-1265. doi: 10.16835/j.cnki.1000-9817.2025264

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Current status of indoor light-at-night exposure during sleep among children and adolescents in Shanghai

doi: 10.16835/j.cnki.1000-9817.2025264

1.
Division of Child and Adolescent Health, Shanghai Municipal Center for Disease Control and Prevention, Shanghai 201107, China

Received Date: 2025-02-08
Rev Recd Date: 2025-04-07

Available Online: 2025-10-10

Publish Date: 2025-09-25

Abstract

Abstract

Objective To understand the indoor light-at-night (LAN) exposure intensity during sleep among children and adolescents in Shanghai, so as to provide a basis for exploring potential health risks and formulating effective interventions. Methods From April to December in 2024, a total of 628 students in grades 4-7 were recruited from three schools in Shanghai. A portable illuminance meter was used to measure LAN for one week, and participants recorded their sleep time. The Kruskal-Wallis H test was used for comparison between groups, and the error bar chart was used to show the trend and variation range of average LAN exposure intensity in different sleep periods. Results The indoor LAN exposure intensity of children and adolescents in Shanghai was [2.4(0.8, 5.9)lx] during sleep, and 28.8% of children and adolescents were exposed to indoor LAN≥5 lx. There was no significant differences in indoor LAN exposure intensity between boys [2.4(1.0, 5.9)lx] and girls [2.3(0.7, 5.9)lx] (Z=-0.86, P>0.05). The indoor LAN exposure intensity of primary school students [2.9(1.1, 6.6)lx] was higher than that of junior high school students [1.0(0.3, 3.1)lx] (Z=-5.87), and indoor LAN exposure intensity of students in the main urban area [3.2(1.1, 7.8)lx] was higher than that of rural students [1.6(0.5, 4.3)lx] (Z=-5.23)(both P < 0.05). The indoor LAN exposure intensity showed an overall decreasing trend during sleep of children and adolescents (tau=-0.81, P=0.02), with a slight increase before waking up. Conclusions Indoor LAN exposure intensity among children and adolescents in Shanghai is generally high, especially among primary school students and students living in the main urban area. Health policy and education should be strengthened to reduce the impact of LAN on children and adolescent health.
- Sleep,
- Light,
- Environmental exposure,
- Child,
- Adolescent

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References(23)

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