Objective:To analyze the characteristics and trends of chronic obstructive pulmonary disease (COPD) burden attributable to non-optimal temperature in China and globally from 1990 to 2021.Methods:This retrospective cross-sectional study utilized data from the Global Burden of Disease (GBD) 2021 database to extract indicators including death numbers, disability-adjusted life years (DALYs), age-standardized mortality rate (ASMR), and age-standardized DALY rate for COPD due to non-optimal temperature in China and globally. The Joinpoint regression model was applied to analyze temporal trends and identify inflection points. Disease burden distribution characteristics were analyzed by gender and age groups. The Bayesian Age-Period-Cohort (BAPC) model was used to predict the disease burden from 2022 to 2035.Results:Compared with 1990, in 2021 the global ASMR and DALY rate for COPD decreased by 44.59% and 50.02%, respectively, while China saw larger reductions of 69.61% and 72.57%. However, the absolute number of deaths and DALYs increased globally by 31.55% and 12.23%, respectively; in China, the number of deaths remained stable while DALYs decreased by 21.59%. The Joinpoint regression model showed statistically significant differences in trend inflection points between China and the world. The disease burden was higher in males than in females and was significantly higher in people aged≥65 years. The projected burden of COPD mortality and DALYs due to non-optimal temperature is expected to continue rising in both China and the world from 2022 to 2035. By 2035, China′s ASMR and DALY rate are predicted to increase to 21.32/100 000 and 284.68/100 000, respectively, and the global ASMR and DALY rate are predicted to rise to 7.88/100 000 and 122.16/100 000.Conclusions:From 1990 to 2021, the burden of COPD due to non-optimal temperature showed a declining trend in both China and globally, but the absolute burden continued to rise, particularly among elderly males and advanced age populations. The burden in both China and globally is projected to continue increasing through 2035, with a higher growth rate in China than globally.

Objective:To analyze the characteristics and trends of chronic obstructive pulmonary disease (COPD) burden attributable to non-optimal temperature in China and globally from 1990 to 2021.Methods:This retrospective cross-sectional study utilized data from the Global Burden of Disease (GBD) 2021 database to extract indicators including death numbers, disability-adjusted life years (DALYs), age-standardized mortality rate (ASMR), and age-standardized DALY rate for COPD due to non-optimal temperature in China and globally. The Joinpoint regression model was applied to analyze temporal trends and identify inflection points. Disease burden distribution characteristics were analyzed by gender and age groups. The Bayesian Age-Period-Cohort (BAPC) model was used to predict the disease burden from 2022 to 2035.Results:Compared with 1990, in 2021 the global ASMR and DALY rate for COPD decreased by 44.59% and 50.02%, respectively, while China saw larger reductions of 69.61% and 72.57%. However, the absolute number of deaths and DALYs increased globally by 31.55% and 12.23%, respectively; in China, the number of deaths remained stable while DALYs decreased by 21.59%. The Joinpoint regression model showed statistically significant differences in trend inflection points between China and the world. The disease burden was higher in males than in females and was significantly higher in people aged≥65 years. The projected burden of COPD mortality and DALYs due to non-optimal temperature is expected to continue rising in both China and the world from 2022 to 2035. By 2035, China′s ASMR and DALY rate are predicted to increase to 21.32/100 000 and 284.68/100 000, respectively, and the global ASMR and DALY rate are predicted to rise to 7.88/100 000 and 122.16/100 000.Conclusions:From 1990 to 2021, the burden of COPD due to non-optimal temperature showed a declining trend in both China and globally, but the absolute burden continued to rise, particularly among elderly males and advanced age populations. The burden in both China and globally is projected to continue increasing through 2035, with a higher growth rate in China than globally.

Objective: To analyze the daily drinking behavior and related factors of primary and middle school students in the Nutrition Improvement Program for Rural Compulsory Education Students (NIPRCES) pilot regions. Methods: Multi-stage stratified random cluster sampling method was used to select one to three national pilot counties in 22 provinces in central and western China where the NIPRCES was implemented in 2019. According to different feeding patterns, two primary schools and two middle schools were selected as key monitoring schools. One or two classes were selected from grade 3 to grade 9. The student questionnaire was used to collect the basic information and daily drinking behavior. Taking whether the drinking water ≥5 cups every day as the dependent variable, multivariate logistic regression model was used to analyze the related factors of drinking behavior among students. Results: A total of 27 374 students were included. On average, primary and middle school students in the regions where NIPRCES was implemented had 3.9 cups of water every day. Logistic regression model showed that boys (OR=1.230, P<0.001), primary school students (OR=1.379, P<0.001), father worked outside the home (OR=1.169, P<0.001), both parents worked outside the home (OR=1.228, P<0.001), non-resident students (OR=1.142, P<0.001), the school in the village (OR=1.638, P<0.001) or township (OR=1.358, P<0.001), school feeding (OR=1.252, P<0.001), the school building with flush toilets (OR=1.384, P<0.001) and the central regions (OR=1.300, P<0.001) students were more likely to drink ≥5 cups water every day. Conclusion: The water consumption of primary and middle school students in the pilot regions of NIPRCES is low, and their drinking behaviors are affected by many factors.
Male ; Humans ; Health Behavior ; China ; Drinking Behavior ; Students ; Drinking Water ; Surveys and Questionnaires

Objective: To analyze the situation and influencing factors of school meals leftover among primary and secondary school students in the area of the Nutrition Improvement Program for Rural Compulsory Education Students, improve the quality of school meals, develop healthy dietary behavior, and reduce food waste. Methods: In 2019, among the 50 monitoring counties that implemented the Compulsory Education Student Nutrition Improvement Program, two primary schools and two junior schools were randomly selected according to different food supply patterns.This study randomly selected one or two classes from grade 3 to grade 9. Basic information and school meals of 26 778 students were collected by using a student questionnaire. Multivariate logistic regression was used to analyze the influencing factors of leftovers rate. Results: 54.93% (14 709) of students wasted school meals, in which the highest rate was the staple food, with the main reason as "not in favor". 11.87% (1 743) of the students wasted school meals 6-7 days a week, with 54.20% (7 957) of students wasted but in less amount. The leftover rate of staple food was the highest (29.78%), followed by vegetables and meat. The main reason of leftovers was that they didn't like this kind of food (33.52%). The rate of school meal waste was higher for girls (OR=1.19,95%CI:1.13-1.25), junior high school students (OR=1.17, 95%CI: 1.11-1.25), resident students (OR=1.06, 95%CI: 1.00-1.12), lower economic level (OR=1.06, 95%CI: 1.00-1.12), parents working outside their houses (OR=1.22, 95%CI: 1.13-1.30), health education classes (OR=1.70, 95%CI: 1.40-2.06), company-based meals (OR=1.89, 95%CI: 1.71-2.07) and school meals were not as good as home food(OR=1.89, 95%CI: 1.78-2.00)(P<0.05). Conclusions: It is common for poor rural primary and middle school students in central and western China to waste school meals, and the reasons were affected by many factors. Reducing food waste requires the joint efforts of individuals, families, schools and society.
Female ; Food Services ; Humans ; Meals ; Refuse Disposal ; Schools ; Students