1.Research Progress of Relationship Between Extreme Low Frequency Electromagnetic Fields and Tumor
Journal of Environment and Health 1989;0(06):-
With the scientific and technological progress and rapid development of the social economy, the extensive application of various electronic equipments has gradually intensified the possibility of ELF-EMF(extreme low frequency electromagnetic fields) exposure, the relationship between ELF-EMF exposure and health effects attracted more and more eyes and many corresponding researches have been finished. In recent years, a lot of epidemiological researches about the relationship between ELF-EMF and leukemia, brain tumor, breast cancer and other tumors have been done at home and abroad, in the present paper the research results were reviewed and the possible mechanism of the effect of ELF-EMF exposure on tumors was discussed.
2.Effects of 915 MHz Electromagnetic Fields on the Concentration of Neurotransmitters in the Brain Tissue of the Mice
Yan WANG ; Zhaojin CAO ; Qiang WANG
Journal of Environment and Health 2007;0(10):-
0.05). Conclusion After exposing to the 915 MHz electromagnetic fields, the changes of the concentration of monoamine neurotransmitters in the cerebral cortex and hippocampus, and the changes of the concentration of Ach in the remnant brain tissue could not be found.
3.The Development of Managing Information System in Initial Response to Environmental Incidents of Public Health
Qiuhong LI ; Xin FANG ; Zhaojin CAO
Journal of Environment and Health 1992;0(02):-
With the rapid growth of economy, environmental incidents of public health happened more frequently. To prevent and control these incidents effectively, governments explored managing information system, which provides technology and decision-making supports for dealing with the incidents. The development, application, services and characteristics of these information systems were summarized in this review, the impendence was also analyzed to develop a management information system in public health field in China.
4.Effect of Microwave Electromagnetic Fields on Activity of Energy Metabolism Cytochrome Oxidase in Cerebral Cortical Neurons of Postnatal Rats
Qiang WANG ; Zhaojin CAO ; Xuetao BAI
Journal of Environment and Health 1992;0(05):-
Objective To investigate the effect of low intensity microwave electromagnetic fields (EMF) on energy metabolism of cerebral cortical neurons of postnatal rats. Methods The cultured neurons were exposed to low intensity 900 MHz continuous microwave EMF (SAR=0.38-3.22 mW/g) 2 hours a day for 4 to 6 consecutive days. The activity of cytochrome oxidase(CCO) was taken as the index for energy metabolism level. Results The results of cytochemistry showed that compared to the sham-exposed, a significant decrease of cytochrome oxidase activity in exposed neurons(0.38-3.22 mW/g P
5.Effects of Handsets of Cellular Telephone on Quality of Sleeping and Depression
Zhaojin CAO ; Yong TAO ; Hongqiao ZHANG ; Al ET
Journal of Environment and Health 1992;0(05):-
To study the effects of electromagnetic radiation from handsets of cellular telephone on quality of user's sleeping and depression 88 staff with handsets of cellular telephone and 77 staff without handsets of cellular telephone from corporations were selected as the subjects The subjects were investigated by questionnaires on their general health,lifestyle habit,psychological stresses,handset using of cellular telephone,living and working environmental exposure,morbidity and quality of sleeping and depression The data was analyzed by chi square,stepwise regression,Logistic regression,and covariance statistics The prevalence rate of insomnia was higher in user's group significantly ( P
6. Cause and control of non-sampling error in China National Human Biomonitoring Program
Yingli QU ; Feng ZHAO ; Ling LIU ; Shixun SONG ; Yingchun LIU ; Jiayi CAI ; Zhaojin CAO ; Xiaoming SHI
Chinese Journal of Preventive Medicine 2019;53(1):107-111
The size of the non-sampling error is directly related to the accuracy and reliability of the sampling survey result. This paper studied the non-sampling errors generated during the sampling process of the China National Human Biomonitoring Program(CNBP), mainly including the sampling frame error, non-response error and measurement error. The program reduced the influence of the non-sampling error on the quality of the survey effectively by scientifically designing the sampling scheme and questionnaire, strengthening investigator trainings and standardizing the data review, which could be used to provide reference for the control of non-sampling errors in public health monitoring projects in China.
7. Association of arsenic with unexplained recurrent spontaneous abortion: a case-control study
Yuanyuan LI ; Suwen CHEN ; Feng ZHAO ; Huimin ZHANG ; Wenli ZHANG ; Yingli QU ; Yingchun LIU ; Heng GU ; Jiayi CAI ; Zhaojin CAO ; Xiaoming SHI
Chinese Journal of Preventive Medicine 2019;53(5):470-474
Objective:
To explore the association of arsenic with unexplained recurrent spontaneous abortion (URSA).
Methods:
A case-control study was conducted to select URSA patients who were admitted to the Beijing Maternal and Child Health Care Hospital affiliated to Capital Medical University from April to October 2018 as a case group. Women who had a normal pregnancy in the Family Planning Department of the hospital but volunteered to have an abortion were selected as a control group. The case and control group were paired in a 1: 1 ratio. The inclusion criteria of the case group were patients with newly diagnosed recurrent spontaneous abortion who had clinically confirmed more than 2 spontaneous abortions and had 20 weeks prior to pregnancy, excluding patients with recurrent spontaneous abortion caused by abnormal blood coagulation (anti-phospholipid antibody positive), abnormal physiological anatomy (B-ultrasound), abnormal immune factors (anti-nuclear antibody positive, anti-cardiolipin antibody, etc.), genetic chromosomal abnormalities (karyotype analysis) and pathogenic microbial infection. The control group was matched according to the age of the case group (±3 years old) and the gestational age (±2 weeks) to exclude adverse pregnancy outcomes such as stillbirth, congenital malformation, premature delivery and low birth weight infants. A total of 192 subjects were included. Questionnaires were used to collect information of all subjects, and 12 ml of peripheral venous blood was collected to detect blood arsenic levels. Blood arsenic levels were divided into low concentration group (<1.00 μg/L), medium concentration group (1.00-1.50 μg/L) and high concentration group (>1.50 μg/L). The multivariate conditional logistic regression was performed to analyze the relationship between blood arsenic exposure and URSA and explore the influencing factors of blood Arsenic.
Results:
The geometric mean values of blood arsenic level in the cases group and control group were 1.68 (1.50-1.86) μg/L and 1.26 (1.17-1.37) μg/L, respectively. The blood arsenic level in the case group was significantly higher than that in the control group (
8. Current status of body mass index and related influencing factors in the elderly aged 65 years and older in 8 longevity areas in China
Yingjian ZHANG ; Yuebin LYU ; Jinhui ZHOU ; Feng ZHAO ; Yingli QU ; Ling LIU ; Yingchun LIU ; Jiaonan WANG ; Zhaojin CAO ; Shiman RUAN ; Xiaoming SHI
Chinese Journal of Epidemiology 2020;41(1):25-30
Objective:
To understand the current status of BMI of the elderly and related factors in longevity areas in China, and provide scientific evidence for the control of BMI level in elderly population.
Methods:
Data used in this study were obtained from Healthy Aging and Biomarkers Cohort Study, a sub-cohort of the Chinese Longitudinal Healthy Longevity Survey. A total of 2 825 elderly in 8 longevity areas in China were surveyed and measured in 2017. The BMI levels of 2 217 elderly aged 65 years and older were calculated and in follow up. The ordered classification logistic regression model was used to analyze the influencd factors for the BMI in the elderly.
Results:
The BMI of the elderly in 8 longevity areas in China was (22.36±3.87) kg/m2, and it was (22.76±3.58) kg/m2 for males and (21.75±3.98) kg/m2 for females. The BMI levels were normal in 1 165 elderly persons. The prevalence of underweight, overweight and obesity were 15.8
9. Influencing factors for depressive symptoms in the elderly aged 65 years and older in 8 longevity areas in China
Qi KANG ; Yuebin LYU ; Yuan WEI ; Wanying SHI ; Jun DUAN ; Jinhui ZHOU ; Jiaonan WANG ; Feng ZHAO ; Yingli QU ; Ling LIU ; Yingchun LIU ; Zhaojin CAO ; Qiong YU ; Xiaoming SHI
Chinese Journal of Epidemiology 2020;41(1):20-24
Objective:
To analyze influencing factors for depressive symptoms in the elderly aged 65 years and older in 8 longevity areas in China.
Methods:
We recruited 2 180 participants aged 65 years and older in 8 longevity areas from Healthy Aging and Biomarkers Cohort Study, a sub-cohort of the Chinese Longitudinal Healthy Longevity Survey in 2017. Multivariate logistic regression analysis was performed to evaluate the relationships of socio-demographic characteristics, behavioral lifestyle, chronic disease prevalence, functional status, family and social support with depressive symptoms in the elderly.
Results:
The detection rate of depression symptoms was 15.0
10. Influence of visual impairment on mortality in the elderly aged 65 years and older in 8 longevity areas in China
Miaochun CAI ; Feng ZHAO ; Dong SHEN ; Yuebin LYU ; Xiru ZHANG ; Jinhui ZHOU ; Yingli QU ; Ling LIU ; Yingchun LIU ; Jiaonan WANG ; Zhaojin CAO ; Xianbo WU ; Xiaoming SHI ; Chen MAO
Chinese Journal of Epidemiology 2020;41(1):31-35
Objective:
To understand the relationship between visual impairment and risk of all-cause mortality in the elderly aged 65 years and older in 8 longevity areas in China.
Methods:
The data of the elderly aged 65 years and older in the project in 2012 were obtained from Healthy Aging and Biomarkers Cohort Study, a sub-cohort of the Chinese Longitudinal Healthy Longevity Survey, including physical measurement and survival status, and a follow-up for survival outcomes were conducted in 2014 and 2017 respectively. Cox proportional hazard regression model was used to analyze the influence of visual impairment on mortality. Gender and age specific analysis was conducted.
Results:
A total of 1 736 elderly adults were included. A total of 943 deaths occurred during the 5-year follow-up period with a 5-year mortality rate of 54.3