Effectiveness of online and offline health education myopia intervention on primary school students / 中国学校卫生

Objective@#To assess the effectiveness of online and offline myopia prevention and control health education interventions using wearable behavior monitoring tools for non myopic elementary school students,so as to provide evidence based medical support for public health practices.@*Methods@#From May to June in 2021, two schools were selected within the same county in Jiangsu Province. School 1 conducted online and offline parental health education ( n =111), while school 2 exclusively conducted offline health education activities, representing the traditional intervention group ( n =122). Students from both schools underwent monitoring through wearable behavior tracking tools, with feedback reports provided (eye distance, eye duration, ambient light, and outdoor exposure time). Both schools relied on activities to carry out health education interventions, and organized the distribution of promotional materials and display boards. The intervention group also established WeChat groups to conduct online "Healthy Parents Action" (answering and providing feedback on health knowledge related to myopia prevention and control, myopia prevention and control, science popularization, etc. raised by parents). Evaluation criteria included myopia rates, post dilation refractive error, and axial length, with a tracking period of two years (from 2021 to 2023). Additionally, the study collected refractive parameters from non myopic students who did not participate in wearable tool monitoring in the 12 classes across the two schools.@*Results@#The baseline results indicated that there were no significant differences between the two groups in terms of refractive parameters and wearable tool monitoring results (including screen time, viewing distance, outdoor exposure time, and homework light exposure)( t/Z/χ 2=1.94,1.17,0.58,0.40,0.80,0.69,0.32, P >0.05). After a two-year follow up, in the first and second year, the myopia rate of the online Healthy Parents Action group (11.4%, 29.7%) were lower than that of the traditional group (26.2%, 50.9%), and the degree of refractive change in the intervention group [0.63(0.38,1.19)D] was lower than that of the traditional group [0.91(0.40,1.50)D], and all the differences were statistically significant( χ 2/ Z =4.93，10.37，2.29， P <0.05). However, there were no significant differences ( P >0.05) in axial length changes between the two groups over the twoyear intervention period. Nevertheless, in the second year, the axial length change in the traditional group [0.35(0.20,0.65)mm] was lower than that in the natural observation group [0.55(0.30,0.75)mm], and this difference was statistically significant ( Z =1.92, P <0.05).@*Conclusions@#Online and offline myopia prevention and control health education can effectively reduce myopia rates. The intervention mode combining wearable behavior monitoring tools with online health education may have better effects, but further large sample and multi center studies are needed to provide additional evidence and confirmation.

A baseline survey on the establishment of myopia follow up cohort among students in Peixian, Xuzhou City / 中国学校卫生

Objective@#This study aimed to find out the myopia rate and related ocular biological parameters of grade 1-3 students in Peixian, Xuzhou City, and to establish a cohort observation population, so as to provide baseline reference for control strategies for myopia and reduce the myopia rate.@*Methods@#A total of 1 952 students from two nine year schools in Peixian were selected by stratified cluster sampling in June 2020. Visual examination was administered by trained personnel using uniformly equipped instruments, including uncorrected visual acuity, diopter, intraocular pressure, axial length.@*Results@#The overall myopia rate of students from grade one to grade three in two schools in Peixian was 21.77%, and the myopia rate of girls (23.81%) was significantly higher than that of boys (20.16%). With the growth of age and grade, the myopia rate increased continuously, and the difference was statistically significant ( χ 2=134.10, 144.30, P <0.05). The myopia rate of 6-year-old group was 8.87 %. The axial length of the left and right eyes of the myopic group was significantly higher than that of the non myopic group ( t = 411.95, 366.85, P <0.01), the intraocular pressure and mean corneal curvature of the left eye of the myopic group were higher than those of the nonmyopic group ( t =5.91, 10.22 , P <0.05).@*Conclusion@#The baseline survey results show that the myopia rate of grade 1-3 in Peixian of Xuzhou City is low, but myopia has occurred in the 6-year-old group. With the growth of age and grade, the myopia rate continues to rise. So it is urgent to explore effective and feasible myopia prevention and control measures.

Relationship between pesticide exposure and adverse pregnancy outcomes among famers: a meta-analysis / 中华劳动卫生职业病杂志

<p><b>OBJECTIVE</b>To analyze the relationship between pesticide exposure and adverse pregnancy outcomes in famers.</p><p><b>METHODS</b>A search was conducted to collect the articles about the relationship between pesticide exposure and adverse pregnancy outcomes published worldwide from 1990 to February 2012. Meta-analysis was performed on the collected articles using RevMan 4.2 software.</p><p><b>RESULTS</b>Twelve articles were collected. Compared with the controls, the pesticide-exposed famers showed a combined odds ratio (OR) for spontaneous abortion of 1.52 (95%CI: 1.04 ∼ 2.21; P = 0.03), a combined OR for premature birth of 1.33 (95%CI: 1.09 ∼ 1.61; P = 0.005), a combined OR for dead fetus of 1.22 (95%CI: 1.16 ∼ 1.29; P < 0.01), a combined OR for stillbirth of 1.90 (95%CI: 0.58 ∼ 6.28; P = 0.29), a combined OR for birth defect of 2.02 (95%CI: 0.84 - 4.69; P = 0.12), a combined OR for low birth weight of 1.62 (95%CI: 0.60 ∼ 4.39; P = 0.34), a combined OR for neonatal death of 2.18 (95%CI: 0.54 ∼ 8.88; P = 0.28), and a combined OR for delayed conception of 1.43 (95%CI: 0.93 ∼ 2.18; P = 0.1). Pesticide exposure increased the risks for spontaneous abortion, premature birth, and dead fetus, but was not significantly associated with stillbirth, birth defect, low birth weight, neonatal death, and delayed conception.</p><p><b>CONCLUSION</b>Pesticide exposure can cause adverse pregnancy outcomes in farmers, increasing the risks of spontaneous abortion, premature birth, and dead fetus.</p>