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2026 Vol. 8, No. 6

Preplanned Studies
Intervention of Hypertension by Occupational Health Management Among Dock Workers — Shenzhen City, Guangdong Province, China, 2020–2024
Naixing Zhang, Wei Zhou, Jinlin Wang, Wenting Feng, Qiujie Sheng, Aipin Xiao, Dafeng Lin, Shaofan Weng
2026, 8(6): 135-140. doi: 10.46234/ccdcw2026.024
Abstract(1430) HTML (19) PDF 429KB(7)
Abstract:
What is already known about this topic?

Hypertension predisposes dock workers to higher health risks in their work environments, requiring urgent intervention via comprehensive health management.

What is added by this report?

This study explored occupational health management in hypertension among dock workers and found that occupational health management measures helped reduce the blood pressure of patients with hypertension, curb the incidence, and slow the growth rate of its prevalence.

What are the implications for public health practice?

The intervention measures adopted in this study should be promoted in similar occupational environments.

Accessible Blood Based Biomarkers Reflecting Inflammation-Lipid Dysregulation in Silicosis Progression — Jiangsu Province, China, 2021–2024
Rong Jiang, Qianqian Gao, Lang Zhou, Feng Shi, Yunfeng Hua, Feifei Wang, Zhen Hong, Lei Han
2026, 8(6): 141-147. doi: 10.46234/ccdcw2026.025
Abstract(1239) HTML (21) PDF 253KB(2)
Abstract:
What is already known about this topic?

Silicosis, an occupational lung disease caused by exposure to silica dust, is characterized by persistent inflammation and lipid dysregulation. Clinicians typically rely on radiographic imaging and pulmonary function tests instead of accessible blood-based biomarkers to quantify inflammation-lipid imbalance and predict functional decline in disease management.

What is added by this report?

We evaluate two novel hematological indices — Neutrophil-to-HDL Ratio (NHR) and Platelet-to-HDL Ratio (PHR) — in 160 patients with silicosis and 123 silica-exposed controls from Jiangsu Province, China. Both the NHR and PHR of patients in the silicosis group are significantly higher than those in the control group, with the highest levels observed in advanced stages (Stage II–III). Both ratios show significant negative correlations with lung function decline (FVC%, FEV1%, FEV1/FVC), and these correlations strengthen in patients with advanced silicosis.

What are the implications for public health practice?

NHR and PHR are low-cost, accessible biomarkers of inflammation-lipid dysregulation during the progression of silicosis. Incorporating these ratios into routine occupational health screening for silica-exposed workers could serve as a complementary method to radiographic examination or spirometry tests, thereby improving silicosis monitoring and management.

Classroom Environmental Determinants of Poor Vision in Chinese Schoolchildren — Guangdong Province, China, 2024
Jingxi Feng, Jing Jiang, Meng Li, Rong Liu, Qiuxia Chen, Chengshu Yang, Jiwei Niu, Lin Xu, Yabin Qu
2026, 8(6): 148-153. doi: 10.46234/ccdcw2026.026
Abstract(1173) HTML (20) PDF 347KB(4)
Abstract:
What is already known about this topic?

The prevalence of poor vision among Chinese children and adolescents has been progressively increasing, constituting a significant public health concern. As the primary visual setting for students, the classroom environment may have a profound impact on ocular health.

What is added by this report?

This study revealed a poor vision detection rate of 60.22% among primary and junior high school students. The statistically significant relevant factors were blackboard reflectance, desk-chair allocation compliance rate, and desktop illuminance uniformity.

What are the implications for public health practice?

This study provides scientific evidence and prioritizes recommendations for modifying classroom environments. It supports targeted environmental interventions as a priority in school-based myopia prevention strategies.

Prevalence and Influencing Factors of Myopia Among Primary and Secondary School Students — Zhejiang Province, China, 2023
Qinye Liu, Chengyong Liu, Yingyun Shi, Xiaoyu Wei, Fen Chen, Yizhou Wei, Mike Zhongyu He, Fang Gu, Weina Liu
2026, 8(6): 154-160. doi: 10.46234/ccdcw2026.023
Abstract(1378) HTML (22) PDF 383KB(4)
Abstract:
What is already known about this topic?

Myopia prevalence among Chinese children and adolescents ranks among the highest globally. Although numerous studies have investigated myopia risk factors, findings remain inconsistent across populations.

What is added by this report?

This study demonstrates that overall myopia prevalence among primary and secondary school students in Zhejiang Province reached 68.87% in 2023, with high myopia affecting 5.82% of students. Notably, regular consumption of a meat and egg-based breakfast emerged as a protective factor against myopia [odds ratio (OR)=0.96, 95% confidence interval (CI): 0.92, 0.99].

What are the implications for public health practice?

Effective myopia prevention requires intersectoral collaboration to reduce academic burden, promote outdoor activities, and implement early screening programs with targeted interventions for high-risk children.

Outbreak Reports
Investigation of an Infectious Diarrhea Outbreak Associated with Direct Drinking Water in a High School — Baisha County, Hainan Province, China, November 2024
Faren Li, Li Qiu, Yan Jin, Huiwen Gao, Jianhua Dong, Meirong Huang, Shennv Xue, Yunhui Su, Xianglin Huang, Ren Qiu, Shuyun Xie
2026, 8(6): 161-167. doi: 10.46234/ccdcw2026.022
Abstract(1255) HTML (21) PDF 780KB(4)
Abstract:
What is already known about this topic?

Diarrheagenic Escherichia coli (DEC) represents a major causative agent of diarrheal outbreaks in China. Transmission occurs through consumption of contaminated food or drinking water and through person-to-person contact, frequently resulting in clustered infections.

What is added by this report?

Between November 6 and 20, 2024, an outbreak of infectious diarrhea affected 344 students at a high school in Baisha County, Hainan Province. Comprehensive field epidemiological and environmental investigations, combined with laboratory testing, identified DEC as the causative agent. This outbreak was primarily attributed to consumption of direct drinking water supplied by substandard water dispensers that inadequately filtered contaminated municipal water.

What are the implications for public health practice?

Substandard direct drinking water dispensers equipped only with polypropylene (PP) cotton and activated carbon filters cannot effectively remove microorganisms. When source water is contaminated, the warm water produced by mixing cold and hot water outputs from such dispensers fails to meet required hygienic standards. Ensuring municipal drinking water compliance and strict implementation of quality and safety management regulations for direct drinking water dispensers are therefore essential for drinking water safety. The public and all relevant sectors should be reminded to purchase and use only qualified direct drinking water dispensers, particularly in schools, collective establishments, and public venues.