Impact of height-desk-chair matching intervention on viewing distance of primary school students
10.16835/j.cnki.1000-9817.2026006
- VernacularTitle:身高课桌椅适配干预对小学生用眼距离的影响
- Author:
ZHANG Yaxin*, YAO Yuan, FENG Mian, WU Yuxuan, CHEN Guoping, TAO Fangbiao, XU Shaojun
1
Author Information
1. Department of Maternal, Child and Adolescent Health, School of Public Health,〖JZ〗 Anhui Medical University, Hefei 230032, Anhui Province, China
- Publication Type:Journal Article
- Keywords:
Desk and chair；Match；Intervention studies；Behavior；Regression analysis；Students
- From:
Chinese Journal of School Health
2026;47(1):51-54
- CountryChina
- Language:Chinese
-
Abstract:
Objective:To compare the effects of height-desk-chair matching on the viewing distance of primary school students before and after intervention, so as to provide scientific basis for the hygiene management of desks and chairs.
Methods:From April to June 2025, a random cluster sampling method was used to select 141 third grade students from three classes equipped with adjustable desks and chairs in a primary school in Hefei City for a height-desk-chair matching intervention study. The height of students desks and chairs was adjusted according to the standard height and height range specified in the Functional Sizes and Technical Requirements of Chairs and Tables for Educational Institutions (GB/T 3976-2014), with an intervention period of one week. Before and after the intervention, eye use data were measured by using the electronic smart device "Cloud Clip", while collecting data on vision data viewing distance, time spent using eyes at close range and outdoor time, desk and chair height, and physical examination. Linear regression analysis was used to investigate the factors related to viewing distance before the intervention of height-desk-chair matching, and a paired t-test was used to analyze the difference in viewing distance before and after the intervention. A mixed effects model was used to explore the effect of height desk and chair adaptation intervention on viewing distance.
Results:The compliance rates for desk and chair adjustments before and after the intervention were 1.4% and 18.4%, respectively, with a statistically significant difference ( χ 2=22.84, P <0.01). The viewing distance increased from (30.48±5.01) cm before intervention to (32.06±5.75) cm post intervention, with a statistically significant difference ( t=4.57, P <0.01). The proportion of students meeting the viewing distance standard increased from 33.3% to 51.1%. The linear mixedeffects model results indicated that the association between height appropriate desk and chair interventions and viewing distance was statistically significant, regardless of whether covariates such as time spent using eyes at close range and outdoor time were adjusted ( β=-1.58, 95%CI = -2.25 to -0.91; β=-1.14, 95%CI =-1.85 to -0.43, both P <0.05).
Conclusion:Height adjusted desks and chairs, which can effectively increase the viewing distance for primary school students, has positive implications for improving healthy eye care behaviors among children and adolescents.
