To explore the mediating effect of activities of daily living (ADL) between arthritis and depression in the elderly, and to provide reference for preventing and intervening the occurrence and development of depression in the elderly.

Based on the 2018 China Health and Retirement Longitudinal Study (CHARLS) data, stepwise regression analysis and Bootstrap intermediary test were used to analyze the mediating effect of ADL between arthritis and depressive symptoms in the elderly.

The prevalence rate of arthritis was 8.12%, and the detection rate of depressive symptoms was 44.60%. Arthritis was positively correlated with ADL (r=0.025, P<0.05), arthritis was positively correlated with depression symptoms (r=0.036, P<0.01), and ADL was positively correlated with depression symptoms (r=0.348, P<0.001). ADL plays a mediating role in the relationship between arthritis and depressive symptoms. The mediating effect of ADL on depressive symptoms was 0.009,and the mediating effect accounted for 25.71% of the total effect.

Arthritis has a certain influence on the depressive symptoms of the elderly through ADL. Comprehensive intervention measures should be taken to improve the joint health of the elderly, reduce the prevalence of arthritis, and improve ADL of the elderly, to prevent the occurrence of depression in the elderly.

To explore the relationship between body mass index (BMI), household fuel type, and peak expiratory flow(PEF) in middle-aged and elderly Chinese people aged 45 and above.

Based on the data of China Health and Retirement Longitudinal Study in 2013 and 2015, the BMI and PEF of the participants were measured and evaluated. According to the self-reported household fuel types, cooking and heating fuels were divided into solid fuel and clean fuel. Linear mixed model was used to analyze the relationships of BMI and household solid fuels using with PEF changes, and residential location was included as a random term. Subgroup analysis and interaction analysis were conducted by gender, urban-rural setting, smoking status, and fuels types.

There was a significant correlation between the reduction of BMI and PEF (β=-1.33,95%CI: -2.31 to -0.33). Compared with the group using clean fuel, the PEF of the group using solid fuel decreased faster than that of the group using clean fuel (cooking: β=-10.16, 95%CI: -16.78 to -3.55; heating: β=-10.13, 95%CI: -18.70 to -1.46). Solid fuels use for heating increased the magnitude of BMI-related PEF decline (interaction P=0.030).

High BMI and solid fuel use are the risk factors for the reduction of PEF in the middle-aged and elderly in China, and there is an interaction between BMI and solid fuel for heating on the reduction of PEF.

To explore the nutritional status of chronic obstructive pulmonary disease (COPD) patients in Hengshui area and to explore the influencing factors of malnutrition in COPD patients.

A total of 321 COPD patients in our hospital from January 2018 to October 2022 were selected, including 189 males and 132 females, aged 49 to 62 years, with an average age of(55.23 ±3.01) years. Patients were divided into normal nutrition group and malnutrition group. Univariate analysis was used to compare the demographic characteristics, clinical data, and laboratory examinations between the two groups. Logistic regression was used to analyze the possible influencing factors of malnutrition in COPD patients.

Logistic regression analysis showed that age (OR=2.496, 95%CI: 1.204-1.860), annual family income (OR=0.569, 95%CI: 0.386-0.839), COPD Assessment Test (CAT) score (OR=1.917, 95%CI: 1.288-2.854), 6-Minute Walk Test (6MWT) (OR=0.550, 95%CI: 0.350-0.865), modified Medical Research Council Dyspnea Scale (mMRC) score (OR=1.944, 95%CI: 1.076-3.515), number of acute exacerbations of COPD hospitalization (OR=1.788, 95%CI: 1.053-3.035), and sarcopenia (OR=2.782, 95%CI: 1.542-5.018) were independent influencing factors of malnutrition in patients with COPD in Hengshui area.

In total 47.35% of the 321 COPD patients in Hengshui area had malnutrition, and age, annual family income, CAT score, 6MWT, mMRC score, acute exacerbation of chronic obstructive pulmonary disease, and sarcopenia are the independent influencing factors of malnutrition in COPD patients. It is suggested to formulate feasible and targeted intervention measures according to the above factors in order to reduce the incidence of malnutrition in patients with COPD, reduce the clinical manifestations of sarcopenia, and prolong the survival time.

To investigate the choice of hospitalization location of floating population and analyze the influencing factors, to provide suggestions for further improving the fairness and accessibility of health services used by floating population and improving the urban medical and health service system.

The data of 4 547 floating people who had used hospitalization service in the 2018 national floating population health and family planning dynamic monitoring questionnaire were analyzed. The main analysis methods were statistical description, χ² test, and binary logistic regression analysis.

Among the 4 547 floating people who used hospitalization services, 3 435 people chose to stay in local hospital, accounting for 75.5%. Binary logistic regression analysis showed that people with education of junior high school and primary school or below (OR=0.732, 95%CI: 0.578-0.927; OR=0.673, 95%CI: 0.514-0.883), inter-provincial mobility (OR=0.784, 95%CI: 0.647-0.949), occupation as production and transportation workers (OR=0.644, 95%CI: 0.462-0.897), and no contracted family doctor (OR=0.782, 95%CI: 0.615-0.994) were more likely to choose non-local hospitals for hospitalization. Those who did not have medical insurance (OR=1.516, 95%CI: 1.071-2.146) and with self-assessed health and basic health (OR=1.813, 95%CI: 1.450-2.268;OR=1.353, 95%CI: 1.095-1.671) were more likely to be hospitalized in the inflow area.

The level of hospitalization service utilization of floating population in China has been improved, but there is still room for improvement. Attention should be paid to the demands of floating population for medical treatment and hospitalization and health security. We should constantly narrow the gap in the utilization of public health services between the floating population and the local population and improve the fairness and accessibility of access to medical and health resources.

To investigate the combined effects of sleep duration and muscle strength on depressive symptoms in Chinese middle-aged and elderly adults, and to provide reference for mental health promotion.

A total of 4 225 participants from the China Health and Retirement Longitudinal Survey (CHARLS) who participated in both 2011 and 2018 waves. Sleep duration and depressive symptoms were assessed using a questionnaire, and muscle strength (grip strength and chair-rising time) was measured. Multivariable adjusted cox regression models were used to explore the combined effects of sleep duration and muscle strength on depressive symptoms.

In total 1 465 (34.67%) participants reported depressive symptoms in 2018. After adjusting for confounding factors, participants with non-recommended sleep duration (> 9 h/d or < 7 h/d), lower grip strength, and longer chair-rising time had significantly increased risk of depressive symptoms. Compared with those with recommended sleep duration (7 to 9 h/d) and high muscle strength (high grip strength and short chair-rising time) group, individuals with non-recommended sleep duration and low muscle strength showed significantly increased risk of depressive symptoms (HR=1.99, 95%CI: 1.38-2.87).

Non-recommended sleep duration and low muscle strength are significant risk factors for depressive symptoms. Thus, increasing muscle strength and improving sleep duration should be recommended for mental health promotion in middle-aged and elderly people.

To investigate the reporting quality of notifiable infectious diseases in Jiangxi Province, analyze the problems in the reporting of infectious diseases, and explore the countermeasures to further standardize the reporting and management of infectious diseases.

The report card information and quality evaluation data of notifiable infectious diseases in Jiangxi Province from 2016 to 2021 were collected and sorted out. The database was established by Excel2013, and the normal operation rate, timely reporting rate, timely audit rate, and reporting accuracy rate of the institutional network were calculated with the use of SPSS22.0. The quality was evaluated comprehensively by Technique for Order Preference by Similarity to an Ideal Solution (TOPSIS) method.

The timely reporting rate of notifiable infectious diseases in Jiangxi Province from 2016 to 2021 was 99.95%, the timely audit rate was 99.97%, and the accuracy rate was 97.86%. The comprehensive quality of legal infectious disease reports increased year by year during 2016 and 2021.

The information reporting of notifiable infectious diseases in Jiangxi Province from 2016 to 2021 is generally good, but there are still some problems such as untimely reporting, untimely examination, and non-standard reporting. Standardized management should be further strengthened and the informatization construction of medical institutions should be promoted to improve the quality of infectious disease information reporting and provide timely and accurate surveillance information for disease prevention and control.

To analyze the effects of watching short videos on the mental health of the middle-aged and elderly in China, to provide scientific basis for improving the mental health of the middle-aged and elderly.

Based on the data of China family panel studies (CFPS) in 2020, the linear regression model and propensity score matching method were used to explore the average effect of watching short videos on the mental health of the middle-aged and elderly.

Watching short videos could significantly improve the mental health level of middle-aged people (β=-0.217, P < 0.05). Watching short videos had a more significant effect on women, rural areas, and middle-aged and elderly people with an education level of junior high school or below (women: β=-0.323, P<0.05; rural areas: β=-0.309, P<0.05; junior high school: β =-0.387, P <0.01; middle-aged people: β=-0.270, P<0.05). The nearest neighbor matching, radius matching, and kernel matching all passed statistical tests.

Watching short videos has to some extent improved the mental health of middle-aged and elderly people, and it is necessary to further increase the internet penetration rate of the elderly population and expand the coverage of smartphone usage training. Attention should be paid to the mental health of women, rural registered residence, middle-aged and elderly people with low education and income levels as well as physical diseases.

To analyze the basic situation and supply equity of child health services in 31 provinces and cities in China from 2010 to 2020.

The relevant data of economic level and child health care of 31 provinces and cities from 2010 to 2020 in China Statistical Yearbook, China Health Statistical Yearbook, and China Health and Family Planning Statistical Yearbook published by the National Bureau of Statistics and the National Health Commission were retrospectively analyzed, and the concentration index(CI) was used to evaluate the supply equity of child health services in 31 provinces and cities in China. The cluster analysis was performed to investigate the child health care services in various provinces and cities in 2020.

In the child health care service projects of 31 provinces and cities in China from 2010 to 2020, the neonatal visit rate and the systematic management rate of children under three years old showed an overall upward trend (χ²_trend = 7.602, P=0.006; χ²_trend = 8.233, P=0.004). Perinatal mortality decreased year by year (χ²_trend = 9.493, P=0.002) but fluctuated slightly in 2016 and 2020. The perinatal mortality rate was the highest in the western region, and the level of child health care service in the central region was lower than the average, but the gap between regions was decreasing. The CIs of neonatal visit rate and systematic management rate of children under three years old were 0.003-0.035 and 0.004-0.065, respectively. The utilization of child health services was mainly distributed in provinces and cities with high economic level, and the CI of perinatal mortality ranged from -0.080 to -0.125. Among them, the unfairness of perinatal mortality was the highest and there was no significant improvement. The results of cluster analysis showed that except for Qinghai, Xinjiang, Anhui, Hainan, Henan, and Xizang, the similarities and differences in the utilization of child health services in other provinces and cities could be classified into similar categories.

The level of child health service and the fairness of service utilization in 31 provinces and cities in China have improved steadily in the past 20 years, which may be affected by the second-child policy and COVID-19. It is suggested that we continue to pay attention to perinatal mortality and give priority to improving the level of child health services in Qinghai, Xinjiang, Anhui, Hainan, Henan, and Xizang.

To investigate the pollution status of arsenic and cadmium in the surrounding area of Daye copper and iron smelter in Huangshi city, Hubei Province, and to evaluate the health risk level of arsenic and cadmium exposure around the mining area.

The pollution status of arsenic and cadmium in environmental media was evaluated by single factor pollution index method and ground accumulation index method, and the health risk assessment model of human exposure pollutants was used to evaluate the health risk of arsenic and cadmium via different exposure pathways.

The single factor pollution index (P_i) of arsenic and cadmium in indoor air and atmosphere were 2.47 and 2.67 (2 < P_i < 3, moderate pollution), respectively, and the P_i of heavy metal arsenic and cadmium in surface water were 1.50 and 1.21, respectively (1 < P_i < 2, mild pollution) in the 10 km range of downwind to southeast of the smelter. The geoaccumulation index (I_geo) of arsenic in sediment samples was 3.87 (3 < I_geo < 4, severe pollution), the I_geo of cadmium was 9.07 (I_geo > 5, severe pollution), the Igeo of arsenic in dust samples was 1.89 (1 < I_geo < 2, moderate pollution), the I_geo of cadmium was 4.80 (4 < I_geo < 5, severe pollution), the I_geo of arsenic in soil samples was 0.27 (0 < I_geo < 1, no moderate pollution), and the I_geo of cadmium was 2.57 (2 < I_geo < 3, moderate-severe pollution). The hazard index (HI) of non-carcinogenic risk of arsenic and cadmium in residents was 11.75 and 1.03, respectively. Exposure to arsenic and cadmium in this area had a potential non-carcinogenic risk to human health. The hazard quotient (HQ) of non-carcinogenic risk of arsenic and cadmium ingested through the digestive tract was 9.89 and 1.03, respectively, and the HQ of respiratory intake was 1.86 and 8.74 × 10^-4, respectively. The HQ of skin contact was 7.47×10^-4 and 2.91×10^-4, respectively. The total carcinogenic risk index (TCR) of arsenic and cadmium was 1.53×10^-3 and 2.15×10^-3, respectively(TCR > 1.00×10^-4). The carcinogenic risk index (R) of arsenic and cadmium intake through digestive tract was 1.53×10^-3 and 2.15×10^-3, respectively. The R value through respiratory tract was 4.10×10^-5 and 1.89×10^-6 respectively, and the R value through skin contact was 4.72×10^-8 and 1.20×10^-7, respectively.

The environmental media in the range of 10 km to the southeast of the smelter are polluted by arsenic and cadmium, and the effects of arsenic and cadmium exposure on the health of residents in the area exceed the acceptable level. The non-carcinogenic risk level and carcinogenic risk level of arsenic and cadmium exposure to residents in this area are as follows: intake through digestive tract > inhalation through respiratory tract > exposure through skin.

To analyze the results of influenza sentinel surveillance in Sichuan Province from 2020 to 2022, to provide basis for influenza prevention and control in Sichuan.

The surveillance data of influenza-like illness (ILI) reported by 30 national influenza surveillance sentinel hospitals in Sichuan Province were collected through China Influenza Surveillance Information System, and the results of influenza sentinel surveillance in Sichuan Province from 2020 to 2022 were analyzed retrospectively by descriptive epidemiological methods.

From 2020 to 2022, there was a correlation between the proportion of ILI to the total number of outpatient and emergency surveillance cases (ILI%) and the detection rate of influenza in ILI samples (r_s=0.626, P < 0.001). From 2020 to 2022, a total of 103 544 influenza samples were collected and tested in Sichuan Province, of which 8 798 were tested positive, with a positive rate of 8.50%. In 2020, the epidemic level of influenza in Sichuan Province was low, and the epidemic peak was in January, which was co-epidemic of subtype A (H3N2) and strain B (Victoria). In 2021, the epidemic peak was in autumn and winter, and the dominant strain was strain B (Victoria). In 2022, there was an obvious summer epidemic peak in Sichuan Province, and the dominant strain was subtype A (H3N2). There were significant differences in the positive rate of ILI among different years, age groups, and cities and states (P<0.001).

Influenza B (Yamagata) was not detected in Sichuan Province from 2020 to 2022, and the main epidemic strain were A(H3N2) and B(Victoria). The epidemic strains in Sichuan Province displayed decreased epidemic levels at the end of 2020 and 2022, which may be attributed to the COVID-19 preventive and control efforts and the occurrence of viral interference. It is necessary to continue influenza surveillance and strengthen the prevention and control of influenza in children and students.