Assessment of S-Specific IgG and IgM Positive Rates in Healthy Hospital Staff Members Vaccinated with the Inactivated SARS-CoV-2 Vaccine.

Widespread vaccination of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) vaccine makes the assessment of antibodies' positive rates essential. In this study, a total of 378 hospital staff members vaccinated with the vaccine were selected as research subjects. Serum-specific IgG and IgM against the SARS-CoV-2 spike protein (S) were detected, and S-specific IgG and IgM positive rates were analyzed in different age and sex groups, as was the serological pattern of IgG/IgM.

Smoking and nasopharyngeal carcinoma mortality: a cohort study of 101,823 adults in Guangzhou, China.

Background: Nasopharyngeal carcinoma (NPC), also known as Cantonese cancer, is rare worldwide, but has particularly high incidence in North Africa and Southeast Asia, especially in Guangdong, China, such as Guangzhou. Tobacco causes head and neck cancers, but nasopharyngeal carcinoma is not included as causally related to smoking in the 2014 United States Surgeon General's report. Prospective evidence remains limited.

[Change of T cell TCR-CD3 complex-mediated gene expression pattern in lead poisoning patients].

Objective: In order to study the feature of T cell TCR-CD3 complex-mediated gene in lead poisoning patients.

Methods: Real-time PCR with SYBR Green I technique was used for determination of the expression levels of CD3 genes in peripheral blood mononuclear cells of 46 cases lead poisoning patients (11 cases in observation group and 35 cases in mild lead poisoning group) and 31 cases in control group.

Results: The median expression levels of CD3γ gene in observation group and mild lead poisoning group (6.

[A study on the relationship between hearing impairment and blood pressure and hypertension in workers occupationally exposed to noise].

Objective: To study the correlation between noise and blood pressure and/or hypertension, and its age characteristic.

Methods: The pure tone audiometric and blood pressure examinations were performed in 14537 workers from 157 factories. Hearing impairment was used as a surrogate indicator of cumulated noise exposure.

[A cross-sectional study on self-reported health and intention of quitting smoking of smokers in Guangzhou factory workers].

Objective: To investigate the health status and intention of quitting smoking in factory workers, so as to provide scientific evidence for smoking control.

Methods: A cross-sectional survey was carried out on smoking behavior, self-reported health status (SRHS), and intention of quitting smoking in 668 Guangzhou factory workers with different job types. Fagerstrom Test for Nicotine Dependence (FTND) was used on current smokers.

[A cross-sectional study on smoking behavior and nicotine dependence among workers in Guangzhou].

Objective: To investigate smoking behavior and nicotine dependence (ND), so as to provide evidence for tobacco control in workers.

Methods: A cross-sectional study to investigate smoking behavior and ND in 668 workers with different job assignment in Guangzhou. Fagerstrom Test for Nicotine Dependence and logistic regression model were used to analyze the association between ND and some risk factors.

[A prospective cohort study on comparison of risk of death of respiratory system diseases between occupational dust exposure and smoking].

Objective: To compare the effects of dust exposure and smoking on mortality of respiratory system diseases (RSD).

Methods: Based on the Guangzhou Occupational Health Surveillance Record System established between 1989 and 1992, 80,987 factory workers, aged 30 years old or older, occupationally exposed or not exposed to dusts, were included in a prospective cohort study.

Results: (1) The mean age of the cohort was 43.

[A prospective cohort study on the comparison of risk of occupational dust exposure and smoking to death].

Objective: To compare the effects of dust exposure and smoking on mortality.

Methods: Based on the Guangzhou Occupational Health Surveillance Record System established in 1989-1992, 80 987 factory workers, aged > or = 30, occupationally exposed to dust and non-exposure to dust, were included in a prospective cohort study.

Results: (1) The mean age of the cohort was 43.

[A cohort study on the relationship between blood pressure levels and the mortality of cerebro-cardiovascular diseases in Guangzhou workers].

Objective: To study the relative risk (RR) of mortalities of cerebro-cardiovascular diseases (CVD) in Guangzhou workers with hypertension.

Method: Prospective cohort study was conducted in 78,379 workers, aged >or= 35, from 399 factories. Cox regression model were mainly used for data analysis.

Lymphocyte DNA damage in cigarette factory workers measured by the Comet assay.

To investigate whether there were separate and combined effects of occupational exposure to tobacco dust and smoking on lymphocyte DNA damage, 148 workers from a cigarette manufacturing factory (107 occupationally exposed to tobacco dust from the production department and 41 unexposed controls who were managerial workers) were included in the study. The Tail Moment (TM) of Comet assay was used to measure DNA damage. The two groups had similar mean age, mean duration of work and smoking prevalence.