Background: So far, there have been no published population studies on the relationship between a COVID-19 infection and public risk perception, information source, knowledge, attitude, and behaviors during the COVID-19 outbreak in China. Objective: This study aims to understand the relationships between COVID-19 infection; four personal nonpharmaceutical interventions (NPIs; handwashing, proper coughing habits, social distancing, and mask wearing); and public risk perception, knowledge, attitude, and other social demographic variables. Methods: An online survey of 8158 Chinese adults between February 22 and March 5, 2020, was conducted. Bivariate associations between categorical variables were examined using Fisher exact test. We also explored the determinants of four NPIs as well as their association with COVID-19 infection using logistic regression. Results: Of 8158 adults included, 57 (0.73%) were infected with COVID-19. The overwhelming majority of respondents showed a positive attitude (n=8094, 99.2%), positive risk perception (n=8146, 99.9%), and high knowledge levels that were among the strongest predictors of the four adopted NPIs (handwashing: n=7895, 96.8%; proper coughing: 5997/6444, 93.1%; social distancing: n=7104/8158, 87.1%; and mask wearing: 5011/5120, 97.9%). There was an increased risk of COVID-19 infection for those who did not wash their hands (2.28% vs 0.65%; risk ratio [RR] 3.53, 95% CI 1.53-8.15; P=.009), did not practice proper coughing (1.79% vs 0.73%; RR 2.44, 95% CI 1.15-5.15; P=.03), did not practice social distancing (1.52% vs 0.58%; RR 2.63, 95% CI 1.48-4.67; P=.002), and did not wear a mask (7.41% vs 0.6%; RR 12.38, 95% CI 5.81-26.36; P<.001). For those who did practice all other three NPIs, wearing a mask was associated with a significantly reduced risk of infection compared to those who did not wear a mask (0.6% vs 16.7%; P=.04). Similarly, for those who did not practice all or part of the other three NPIs, wearing a mask was also associated with a significantly reduced risk of infection. In a penalized logistic regression model including all four NPIs, wearing a mask was the only significant predictor of COVID-19 infection among the four NPIs (odds ratio 7.20, 95% CI 2.24-23.11; P<.001). Conclusions: We found high levels of risk perception, positive attitude, desirable knowledge, as well as a high level of adopting the four NPIs. The relevant knowledge, risk perception, and attitude were strong predictors of adapting the four NPIs. Mask wearing, among the four personal NPIs, was the most effective protective measure against COVID-19 infection, with added preventive effect among those who practiced all or part of the other three NPIs.

Object: The correct use of nutrition labels for prepackaged food helps university students develop healthy eating habits and prevent the occurrence of chronic non-communicable diseases. This study evaluates the understanding and use of nutrition labels of prepackaged food by university students in four different fields of study in Chongqing, China. Methods: This cross-sectional study used an online survey platform conducted in July 2022 in colleges and universities in Chongqing, China. The convenience sampling method was used to select students in four different fields of study, including medicine, humanities, science and technology, and arts and sports. Ten questions were used to assess participants’ understanding of nutrition labels. A score of six or above (60%) indicates that the respondent has a basic understanding of the nutritional labels of prepackaged food. Descriptive statistics and generalized linear models (GLMs) were used to assess participants’ understanding and use of nutrition labels for prepackaged foods and their influencing factors. Results: A total of 1262 valid questionnaires was collected. The average age of the participants was 21.8 years (SD: 2.43), 50.1% were male, 80.8% were ethnic Han, and 50.9% were from rural areas. Only 21.3% of the university students in Chongqing had a good understanding of the nutrition labels of prepackaged food, where medical students were the highest (39.9%) and science and engineering students were the lowest (15.6%). Gender, ethnicity, grade, major, and whether received courses related to nutrition were influential factors in the understanding and use of nutrition labels of prepackaged food. Medical students also had more positive attitudes toward nutritional labels of prepackaged food. Conclusions: Understanding and use of nutrition labels for prepackaged food by university students in Chongqing are unsatisfactory. Student’s major was a significant influencing factor in nutrition label comprehension, with medical students having the greatest understanding. Based on these results, we suggest that nutrition and health courses should be popularized among non-medical students to narrow the differences between different fields of study. For university students in all fields of study, education and publicity of nutrition labels of prepackaged food are needed, not only in the classroom but also in daily life.

This study analyzed the factors influencing childcare preference and the relationship between childcare preference and childcare service demand scale, using data collected from a questionnaire survey of 3,921 parents of infants and toddlers in Chongqing, China. The results indicate that parents with higher incomes, higher education levels, older ages, multiple infants, and dual-career living in urban areas have a stronger preference for childcare. In the shared or grandparent care model, the childcare preference is not obvious. Parents of infants tend to choose childcare institutions that provide reception services, early education, and convenience services. Higher quality environmental facilities tend to reduce the preference of parents for childcare.

Objective: Against the background of rapid population aging, this study examined the associations between social participation and physical and mental health among middle-aged and older adults in China and explored potential psychosocial pathways involving loneliness and subjective well-being. Methods: Data were drawn from the 2023 Chinese General Social Survey (CGSS). A total of 3823 respondents aged 45 years and older were included in the analysis. Ordinary least squares regression models were used to examine the associations between social participation and physical and mental health. Sensitivity analyses, robustness checks, ordered logit models, and supplementary instrumental variable analyses were conducted to assess the consistency of the findings. Serial mediation analysis was used to explore the potential indirect associations involving loneliness and subjective well-being. Results: Higher levels of social participation were positively associated with better physical health and mental health among middle-aged and older adults (p < 0.001). Sensitivity and robustness analyses generally supported the consistency of these findings. Supplementary instrumental variable analyses showed a significant positive association with mental health, while the positive estimate for physical health was not statistically significant. Exploratory mediation analyses suggested that loneliness and subjective well-being may represent potential psychosocial pathways linking social participation to health outcomes. The total indirect association accounted for 22.40% of the total association with physical health and 33.24% of the total association with mental health. Conclusions: Social participation was positively associated with health among middle-aged and older adults in China, with more consistent evidence for mental health. Loneliness and subjective well-being may represent potential psychosocial pathways linking social participation to health outcomes.

BACKGROUND So far, there have been no published population studies on the relationship between a COVID-19 infection and public risk perception, information source, knowledge, attitude, and behaviors during the COVID-19 outbreak in China. OBJECTIVE This study aims to understand the relationships between COVID-19 infection; four personal nonpharmaceutical interventions (NPIs; handwashing, proper coughing habits, social distancing, and mask wearing); and public risk perception, knowledge, attitude, and other social demographic variables. METHODS An online survey of 8158 Chinese adults between February 22 and March 5, 2020, was conducted. Bivariate associations between categorical variables were examined using Fisher exact test. We also explored the determinants of four NPIs as well as their association with COVID-19 infection using logistic regression. RESULTS Of 8158 adults included, 57 (0.73%) were infected with COVID-19. The overwhelming majority of respondents showed a positive attitude (n=8094, 99.2%), positive risk perception (n=8146, 99.9%), and high knowledge levels that were among the strongest predictors of the four adopted NPIs (handwashing: n=7895, 96.8%; proper coughing: 5997/6444, 93.1%; social distancing: n=7104/8158, 87.1%; and mask wearing: 5011/5120, 97.9%). There was an increased risk of COVID-19 infection for those who did not wash their hands (2.28% vs 0.65%; risk ratio [RR] 3.53, 95% CI 1.53-8.15; P=.009), did not practice proper coughing (1.79% vs 0.73%; RR 2.44, 95% CI 1.15-5.15; P=.03), did not practice social distancing (1.52% vs 0.58%; RR 2.63, 95% CI 1.48-4.67; P=.002), and did not wear a mask (7.41% vs 0.6%; RR 12.38, 95% CI 5.81-26.36; P<.001). For those who did practice all other three NPIs, wearing a mask was associated with a significantly reduced risk of infection compared to those who did not wear a mask (0.6% vs 16.7%; P=.04). Similarly, for those who did not practice all or part of the other three NPIs, wearing a mask was also associated with a significantly reduced risk of infection. In a penalized logistic regression model including all four NPIs, wearing a mask was the only significant predictor of COVID-19 infection among the four NPIs (odds ratio 7.20, 95% CI 2.24-23.11; P<.001). CONCLUSIONS We found high levels of risk perception, positive attitude, desirable knowledge, as well as a high level of adopting the four NPIs. The relevant knowledge, risk perception, and attitude were strong predictors of adapting the four NPIs. Mask wearing, among the four personal NPIs, was the most effective protective measure against COVID-19 infection, with added preventive effect among those who practiced all or part of the other three NPIs.

Background: To investigate the nutritional status and household sanitation among children under 5 in Tibetan and Sichuan minority areas and to analyse the association between nutritional status and household sanitation. Methods: A cross-sectional survey was conducted by the probability proportional to size sampling method between August and October 2016. Nutritional status was evaluated according to the standards of growth and development recommended by the World Health Organization. Bivariate and multivariate logistic regression analyses were used to analyse the association between nutritional status and household sanitation. Results: A total of 965 children under the age of 5 and their caregivers were included. The rates of normal development, stunting, underweight, wasting, overweight and obesity of children in Sichuan and Tibet were 69.0%, 19.8%, 8.0%, 5.2%, 4.6% and 1.8%, respectively. The multivariable logistic regression analyses shows that other unprotected water sources (AOR=3.21, 95%CI=1.41~7.32), unboiled drinking water (AOR=2.05, 95%CI=1.41~2.97), sanitary and dry toilets (AOR=2.04, 95%CI=1.12~3.71), unsanitary and dry toilets (AOR=2.80, 95%CI=1.42~5.51), usually do not washing hands at critical times (AOR=2.11, 95%CI=1.15~3.90), washing hands only with water (AOR=1.53, 95%CI=1.03~2.26) and unsanitary treatment of children's faeces (AOR=1.56, 95%CI=1.11~2.20) were the risk factors for stunting in children. Protected well water (AOR=4.28, 95%CI=1.46~12.52), other unprotected water sources (AOR=4.30, 95%CI=1.36~13.61), unsanitary and dry toilets (AOR=4.44, 95%CI=1.26~15.59), washing hands at only one critical moment (AOR=2.77, 95%CI=1.15~6.65), washing hands only with water (AOR=2.22, 95%CI=1.20~4.09) and unsanitary treatment of children’s faeces (AOR=2.01, 95%CI=1.23~3.28) were risk factors for underweight in children. Conclusion: The malnutrition of children under 5 years of age in the rural areas home to ethnic minorities in Sichuan and Tibet is serious, and the problem of stunting is particularly prominent. The children's household sanitation status is poor, and the family's economic income has an impact on household sanitation; thus, household sanitation has an impact on both the height and the weight of the child. The relevant departments should increase the family's economic income while conducting household sanitation interventions, thereby reducing the incidence and mortality due to malnutrition.