[Eating out of home of urban adults in eighteen provinces (autonomous regions, municipalities) of China in 2017].

OBJECTIVE: To analyze the eating out of home behavior of urban adults in China. METHODS: Samples were chosen from China Food Consumption Survey in 2017. A total of 17 234 participants aged 18 and above were included in the final analysis. The food frequency questionnaire were used to collect eating out of home status in the past week. χ~2 test was used to compare the difference in the rate of eating out of home and dining places among different groups. Non-parametric test was used to compare the differences in dining out times. RESULTS: The overall prevalence of eating out of home was 55.6% in urban adults aged in 2017. The average number of eating out of home was 2.8 times. The proportion of eating in hotels and restaurants was 36.0%. The proportion of eating in the canteen of school, workplace and other places was 19.8%. The rate of eating out of home and dining out times were higher among male, 18-44 years old, people with higher educational level and higher household income. The proportion of students eating in canteen was higher. The proportion of professional technicians and service staff eating in hotels and restaurants were higher. CONCLUSION: Eating out of home is more common among urban adults aged 18 and above in China. Young people aged 18-44 years old eat out more often in the past week. The proportion of people eating in hotels and restaurants is higher.

[Association of beverages intake with myopia among 11-14-year-old Chinese children in 2019-2021].

OBJECTIVE: To describe beverages intake and its association with myopia among 11-14-year-old children in China. METHODS: Multi-stage stratified cluster random sampling was used and children aged 11 to 14 years were selected from 28 cities and rural areas in 14 provinces in China, and a total of 12 397 children were included in this study. Information including demographic characteristics, myopia status, dietary intake, physical activity, screen time, sleep duration were collected from questionnaire survey. RESULTS: During 2019-2021, the prevalence of myopia among children aged 11 to 14 in China was 45.0%. The median beverages intake was 42.7 g/d. Children who did not drink beverages and whose beverages intake was <150 g/d and ≥150 g/d accounted for 42.8%, 44.8% and 48.4%, respectively. Multivariate Logistic regression analysis showed that girls' beverages intake ≥150 g/d was still a risk factor for the prevalence of myopia after controlling for confounding factors such as age, area, physical activity, screen time, sleep duration and intake of sugary food(OR=1.24, 95%CI 1.08-1.42, P<0.05). Among children with myopia, mild myopia, moderate and above myopia accounted for 71.6% and 28.4% among boys and 73.8% and 26.3% among girls, respectively. There was no statistically significant regression between beverages intake and myopia in boys and girls regardless of whether confounding factors were adjusted(P >0.05). CONCLUSION: Children's beverages intake was generally common in China in 2019-2021. Children who consumed higher beverages were more likely to have myopia than that did not consume beverages.

[Usage status of salt control spoon and influencing factors among students' caregivers of four cities in China in 2014].

OBJECTIVE: To analysis the usage status of salt control spoon and explore its influencing factors among student caregivers of four cities. METHODS: The data of 2014 salt knowledge, attitude, practice(KAP) survey among urban residents in China was used, which a total of 12 848 student caregivers(male 4862, female 7986) were recruited from Guangzhou, Wuhan, Chengdu and Shenyang by stratified random cluster sampling method. A self-filling questionnaire survey was used to collect information about knowledge of salt and usage of salt control spoon. Logistic regression model was used to explore influencing factors of salt control spoon usage effected by gender, education level, family income, salt related knowledge, etc. . RESULTS: The proportion of student caregivers who didn't know salt control spoon was 33. 3%, and 41. 9% of them knew salt control spoon but hadn't it. Only 24. 8% of them have heard of salt control spoon and had it at home. The proportion of having not heard salt control spoon among Wuhan, male, junior high school and below, other occupation and low family income group was higher than other groups. The proportion of having salt control spoon of groups in Guangzhou, female, high school and above, professional technical and clerical personnel, high family income was higher than other groups, and the difference was statistically significant(P<0. 01). Among the student caregivers having salt control spoon, the proportion of did not used salt control spoon, used it occasionally or used it without controlling the quantity and used it often and controlled the quantity was 10. 0%, 60. 6% and 29. 5%, respectively. The student caregivers of Shenyang, male, high family income groups used salt control spoon and controlled the quantity more often than the other groups, and the difference was statistically significant(P<0. 05). As shown in multivariate logistic regression analysis, the OR(95%CI) of high school and above, high income level, knowing the recommended intake of salt, knowing that high salt diet can cause high blood pressure on the influence of having salt control spoon was 1. 328(1. 221-1. 445), 1. 268(1. 029-1. 563), 1. 243(1. 145-1. 348)and 0. 838(0. 763-0. 921), respectively. Among the student caregivers who having salt control spoon, the OR(95%CI) of knowing the recommended intake of salt, knowing that high salt diet can cause high blood pressure, and source of salt control spoon(community/unit, friends/relatives) on the influence of using salt control spoon was 1. 473(1. 259-1. 722), 1. 249(1. 040-1. 501)and 0. 505(0. 415-0. 615)/0. 603(0. 441-0. 823), respectively. CONCLUSION: There still existed lower proportion of awareness and usage of salt control spoon.

[Salt intake knowledge and behavior among school teachers in four Chinese cities in 2014].

OBJECTIVE: To learn the knowledge level on "salt and health", and analyze the influence on related behavior among school teachers in four Chinese cities. METHODS: The data of 2014 salt KAP among urban residents in China was used, with stratified random cluster sampling, a total of 2518(male 708, female 1810) school teachers were selected from four cities of China, including Shenyang, Wuhan, Chengdu and Guangzhou city. Self-filled questionnaire was used to collect the information on the salt intake knowledge and behavior. The statistical software package SAS version 9. 4 was used for data analysis. RESULTS: Among the teachers in four Chinese cities, about 50. 9% of them knew the recommendation of salt intake, about 66. 6% of them knew sodium in the salt may influence health. Approximately 85. 3% of them knew eating long-term salty food may cause hypertension. The proportions of knowing salt intake among female, 40 years and older, below the undergraduate, higher family income teachers were higher than their counterparts(P<0. 05). The proportions of knowing the health influence of sodium among female, higher family income teachers were higher than their counterparts(P<0. 05). The proportions of knowing that eating long-term salty food may cause hypertension among female, undergraduate and above, higher family income teachers were higher than their counterparts(P<0. 05). About 80. 1% of them knew the nutrition labeling on the package food, about 19. 7% of them knew the nutrition labeling contents. Teachers utilized nutrition labeling differently owing to their knowledge on the labeling contents(P<0. 05). In the past three months, about 21. 4% of the teachers always use low-sodium salt when cooking, only 4. 2% of them always control their family's salt intake by using salt control spoon, about 25. 4% of them always choose low-sodium food when purchasing, only 15. 1% of the teachers requested the meals cooked lightly when eating out. The proportions of teachers who used low-sodium salt among female, higher family income, knowing salt intake recommended, knowing the health influence of sodium, knowing that long-term salty food may cause hypertension, active learning related knowledge, family members suffering from hypertension were higher than their counterparts(P<0. 05). The proportions of using salt control spoon among teachers under Bachelor's degree, active learning related knowledge were higher than their counterparts(P<0. 05). The proportions of teachers purchasing low-sodium food among 40 years and older, under Bachelor's degree, higher family income, knowing salt intake recommended, knowing the health influence of sodium, knowing that long-term salty food may cause hypertension, family members not suffering from hypertension, active learning related knowledge were higher than their counterparts(P<0. 05). The proportions of teachers requesting the meals cooked slightly when eating-out among 40 years and older, under Bachelor's degree, not knowing salt intake recommended, not knowing that long-term salty food may cause hypertension, not knowing if their family members suffered from hypertension, active learning related knowledge were higher than their counterparts(P<0. 05). The teachers consumed soy sauce, bean paste, fried bread stick differently owing to their knowledge about this(P<0. 05). CONCLUSION: The teachers in the four cities have grasped some knowledge on salt and health, but their related behaviors should be improved to reduce the salt intake.

Association of physical activity, sedentary time, and sleep duration on the health-related quality of life of college students in Northeast China.

BACKGROUND: College life represents a key transitional period in the life of young adults that is marked by increased social engagement; living habits acquired during this period have implications on the future life of college students. Therefore, investigation of the determinants of health status of college students is a key imperative; however, there is limited evidence on the study of concomitant effects of physical activity (PA), sedentary time (ST), and sleep duration on the health-related quality of life (HRQOL) of college students. METHODS: This cross-sectional survey was conducted at a medical university in Shenyang in Northeast China in 2017. The study group comprised 926 undergraduate students. Data were collected by a self-administered questionnaire. PA, ST, sleep duration, and HRQOL were measured using the international physical activity questionnaire (IPAQ)-Long Form and the Chinese version of the 12-Item Short-Form Health Survey (SF-12). The association of PA, ST, and sleep duration with the HRQOL was examined using independent t-test, Pearson Chi-squared test, and multivariate linear regression analysis. RESULTS: After adjusting for potential confounding factors, students who reported high PA had significantly higher physical component summary (PCS) score in the total study population and among female students than those who reported low PA, whereas students who reported moderate PA had significantly higher PCS score only among female students (P < 0.05). In the total study population and among male students, students who slept for ≥9 h/day had significantly higher mental component summary (MCS) score than those who slept for 7-< 8 h/day, whereas among only male students, those who slept for 8-< 9 h/day had significantly higher MCS score (P < 0.05). The interaction term between ST and PA was not statistically significant. CONCLUSIONS: PA and sufficient sleep duration had a positive impact on the HRQOL of college students; however, ST was not associated with HRQOL and there was no interaction between the impact of ST and PA on the HRQOL of college students. Increasing PA and promoting adequate sleep duration are key health promotion strategies for college students.

Relationship between cumulative ultraviolet exposure and cognitive function in a rural elderly Chinese population.

OBJECTIVES: Some researchers have focused on the relationship between vitamin D and cognition, but the conclusions are inconsistent. We estimated cumulative UV exposure could be used to represent the individual's long-term vitamin D status and investigated its association with global cognitive function in elderly Chinese. METHODS: A total of 641 participants aged 60 years and over were recruited in a rural area of Shenyang, China. All were interviewed to obtain data regarding sociodemographic characteristics and time spent outdoors. Cognitive function was evaluated using the Montreal Cognitive Assessment-Beijing version (MoCA-BJ). Images of skin from UV-exposed (dorsal hand) and UV-protected (inner forearm) sites from each individual were graded by the Beagley-Gibson system. Differences in skin-grade between the 2 sites were used to indicate cumulative UV exposure level. Subjects were grouped in tertiles based on skin-grade differences (<1.75, 1.75-2.74, and ≥ 2.75), representing low, medium, and high UV exposure levels, respectively. The MoCA-BJ score was classified in tertiles as low (<19), middle (19-22), and high (≥23) levels of cognition. Associations between cognitive function and UV exposure were analyzed using ordinal regression. RESULTS: Skin-grade differences were associated with self-reported time spent outdoors. After adjustment for age, gender, education, BMI, whether living alone, income, diet, hypertension, and diabetes, a high UV exposure level was associated with better cognitive function (odds ratio = 0.643, 95% confidence interval = 0.427-0.969). CONCLUSIONS: Greater cumulative UV exposure appears to be associated with better cognitive function in elderly adults.

[Physical activities and its influencing factors among students' parents in four cities in China, 2014].

OBJECTIVE: To study the status of physical activities and its influencing factors among parents of primary and secondary school students, to provide basis for improving students' parents physical activities. METHODS: A total of 12 501 parents ofprimary and secondary school students from Shenyang, Guangzhou, Chengdu and Wuhan were selected by stratified random cluster sampling. They completed a self-designed questionnaire that was derived from International Physical Activity Questionnaire( IPAQ). Logistic regression model was used to analyze the influence of region, stage of school, gender, age, education level, occupation and economic level on physical activities among parents of primary and secondary school students. RESULTS: The rate of students' parents with insufficient physical activity was 58. 3%, and the rate of students' parents spending2 h and more on sedentary activities per day was 55. 7%. Logistic regression analysis showed that compared with primary school students ' parents, the risk of insufficient physical activity and spending 2 h and more on sedentary activities of junior and senior middle school students' parents were decreased( the risk of insufficient physical activity:ORjunior( 95% CI) = 0. 796( 0. 728-0. 869), ORsenior( 95% CI) = 0. 746( 0. 683-0. 815); the risk of spending 2 h and more on sedentary activities: ORjunior( 95% CI) =0. 823( 0. 750-0. 904), ORsenior( 95% CI) = 0. 788( 0. 712-0. 872)). Compared with students' parents with primary school education, the risk of insufficient physical activity and spending 2 h and more on sedentary activities of parents with junior college or above education were increased( the risk of insufficient physical activity: OR( 95% CI) = 1. 288( 1. 107-1. 497); the risk of spending 2 h and more on sedentary activities: OR( 95%CI) = 1. 303( 1. 120-1. 515)). Compared with housework/unemployed/retirees, the risk of insufficient physical activity and spending 2 h and more on sedentary activities of agricultural/equipment operators were decreased( the risk of insufficient physical activity:OR( 95% CI) = 0. 755( 0. 634-0. 899); the risk of spending 2 h and more on sedentary activities: OR( 95% CI) = 0. 731( 0. 617-0. 867)). CONCLUSION: The rate of insufficient physical activity and spending 2 h and more on sedentary activities among students' parents were relatively higher. The influencing factors on physical activity level and sedentary activity time were region, stage of school, education level and occupation. Specific interventions should be developed for different people.

The effects of breakfast on short-term cognitive function among Chinese white-collar workers: protocol for a three-phase crossover study.

BACKGROUND: As the first meal of the day, breakfast plays an important role in supplying energy and nutrients, which are critical to working and learning activities. A three-phase crossover study was designed to investigate the effects of breakfast on cognitive function among Chinese white-collar workers. The planned study protocol is presented. METHODS: A total of 264 participants aged 25-45 years will be recruited from Shenyang and Chongqing. Self-administered questionnaires will be used to collect information on age, gender, marital status, education level, occupation, smoking habits, drinking habits, and breakfast behaviours. The participants will be randomly assigned to 3 equal-sized groups (Groups A, B, and C) and will be provided with a nutrition-adequate breakfast, a nutrition-inadequate breakfast, or no breakfast, respectively. Each participant will receive the breakfast treatment on the basis of assignment to one of three sequences (ABC/BCA/CAB). Each participant will complete a battery of cognitive tests assessing short-term memory, attention, and working memory 120 minutes after breakfast. Mood will be measured through a self-administered questionnaire assessing the dimensions of positive and negative frames of mind. Additionally, fasting blood glucose and postprandial 2-hour blood glucose levels will be tested with a blood-glucose meter (Roche ACCU-CHEK®-Performa). All the participants will take all the tests in three successive weeks, and the order of presentation will be counter-balanced across groups. DISCUSSION: The present study will be the first investigation of the effect of breakfast food type and quality on cognitive function amongst white-collar workers in China. We predict that a nutrition-adequate breakfast, compared with a nutrition-inadequate breakfast and no breakfast, will significantly improve short-term cognitive function. The results of this study should provide scientific evidence of the effect of breakfast quality on cognitive function and provide scientific data to inform nutrition education strategies and promote a healthy lifestyle. TRIAL REGISTRATION: Chinese clinical trial registry (Primary registry in the WHO registry network) Registration number: ChiCTR-IPR-15007114 . Date of registration: August 25, 2015.

[Effects of parents on primary and secondary school students' breakfast behaviors in four cities in China].

OBJECTIVE: To study the effects of parents on primary and secondary school students' breakfast behaviors in four cities in China. METHODS: A stratified random cluster sampling method was used to recruit subjects. A total of 10 545 primary and secondary students and their parents were selected from Shenyang, Guangzhou, Wuhan and Chengdu. A questionnaire survey was used to collect information about frequency and nutrition quality of their breakfast. RESULTS: Primary and secondary school students' breakfast behaviors were positively correlated with their parents'. Compared with not eating breakfast, the OR( 95% CI) values of parents eating 1 to 3 times, 4 to 6 times and 7 times breakfast a week were 2. 917( 1. 856-4. 585), 4. 323( 3. 010-6. 208) and 5. 829( 4. 317-7. 870), respectively. Compared with poor nutrition quality, the OR( 95% CI)values of adequate and good nutrition quality of parents' breakfast were 1. 875( 1. 542-2. 280) and 6. 372( 5. 270-7. 704). The higher the educational level of parents, the more likely students did not eat breakfast, but the more adequate nutrition quality of breakfast. CONCLUSION: Parents' breakfast behaviors greatly influence on the students'. Interventions should be taken against the different educational levels of parents.

Ultra-Processed Food Consumption and Risk of Overweight or Obesity in Chinese Adults: Chinese Food Consumption Survey 2017-2020.

Overweight and obesity have increased rapidly in the past few decades in China, and less research has focused on the association between the consumption of ultra-processed foods (UPFs) and overweight or obesity in Chinese adults. The objective of this study was to determine the relationship of UPF consumption with the risk of overweight or obesity in Chinese adults. Residents aged 18 years and above who participated in the nationally representative survey Chinese Food Consumption Survey in 2017-2020 were included in this study. Dietary intake data were collected via non-consecutive three-day 24 h dietary recalls and weighing household foods and condiments. According to the NOVA food classification system, UPFs were classified depending on the purpose and extent of food processing. Multiple logistic regression and multivariate-adjusted restricted cubic spline (RCS) regressions were performed to estimate the association between UPF consumption (categorized into quartiles: quartile 1 (Q1), quartile 2 (Q2), quartile 3 (Q3), and quartile 4 (Q4)) and risk of overweight or obesity. A total of 38,658 adults aged 18 years and above participated in the present study. The prevalence of overweight and obesity in adults was 33.0% (95% CI: 32.91-33.10) and 9.6% (95% CI 9.55-9.67), respectively. After a multivariable adjustment, the risk of overweight or obesity was increased by 10% in Q3 (OR: 1.10, 95% CI: 1.04-1.17) compared to Q1 as a reference. Women (OR: 1.10, 95% CI: 1.01-1.20) and adults living in small and medium-sized cities (OR: 1.13, 95% CI: 1.01-1.26) with higher UPF consumption had higher odds of overweight or obesity. Nevertheless, the effect of higher UPF consumption on the risk of overweight or obesity was relatively weak for overall adults in China. The top three categories of subgroups consumption of UPFs were 1: sugar-sweetened beverages; 2: sauces, cheeses, spreads, and gravies; and 3: ultra-processed breads and breakfast cereals. These findings provide evidence that higher UPF consumption was positively associated with overweight or obesity, which was defined based on Chinese criteria among women and adults living in small and medium-sized cities in China. Further studies, such as intervention trials, are needed to identify the mechanism of correlation between the consumption of UPFs and health-related outcomes in Chinese adults. From a public health perspective, with the prevalence of overweight and obesity growing and the increase in UPF consumption in Chinese adults, it is necessary to promote healthy food intake and a balanced diet through active nutritional education actions for overweight and obesity prevention and control.

Dietary patterns and hypertension among Chinese adults: a nationally representative cross-sectional study.

BACKGROUND: Several healthful dietary patterns appear to be effective at lowering blood pressure and preventing hypertension. However, the relationship between dietary patterns and hypertension among a representative Chinese population sample is unclear. METHODS: A nationally representative sample of 23 671 participants aged 18-59 years were recruited by the 2002 China National Nutrition and Health Survey. All participants had their blood pressure measured with standardized mercury sphygmomanometers. Hypertension was defined as systolic blood pressure ≥140 mmHg and/or diastolic blood pressure ≥90 mmHg. We conducted factor analysis using dietary information from a validated food frequency questionnaire to derive dietary patterns. Information of participants on physical activities, education level, annual household income, smoking status and family history of hypertension was collected by interviewer-administrated questionnaires. RESULTS: Three major dietary patterns, defined as 'Western', 'traditional northern', and 'traditional southern', were identified. Participants with the highest quartile for the score of the Western pattern had significantly higher blood pressure comparing with counterparts in the lowest quartile. In contrast, participants in the top quartile for the score of the traditional southern pattern presented significantly lower blood pressure comparing with counterparts in the lowest quartile. In multivariate analyses the traditional northern pattern score was associated with an odds ratio (OR) of 1.30 (95% confidence interval (CI) 1.11-1.53, P for trend = 0.0001) comparing with the lowest quartile. The OR for the top quartile of score for the traditional southern pattern was 0.73 (95% CI, 0.59-0.89, P for trend = 0.0040) compared with the lowest quartile of traditional southern pattern score. However, the significant association between the traditional northern pattern and prevalence of hypertension disappeared after further adjusting for body mass index (BMI) (P for trend = 0.3), whereas the association between the traditional southern pattern and prevalence of hypertension persisted after further adjusting for BMI (P for trend = 0.01). CONCLUSIONS: We observed a positive relationship between the traditional northern pattern and hypertension that was mediated through differences in BMI. In addition, the traditional southern pattern was significantly associated with lower odds of presenting with hypertension.

[Changes of dietary pattern among adults in Liaoning province, 1989 to 2006].

OBJECTIVE: To study the changes of dietary pattern among adult residents in different areas of Liaoning province from 1989 to 2006. METHODS: Healthy adults (6213 subjects) at age of 18 - 65 years from 480 households in three cities (Shenyang, Yingkou, Wafangdian) and three counties (Qingyuan, Huanren, Chaoyang) were selected with stratified multiple cluster random sampling. The information on nutrient intake of the subjects were collected from datasets of Chinese Health and Nutrition Survey conducted in 1989, 1991, 1993, 2000, 2004, and 2006. Different food intake, the nutrients intake percentages for recommended nutrition intake (RNI) and appropriate intake (AI), and the percentages of total energy and protein from grain, animal product, bean and its product were calculated to assess the residents' dietary pattern and nutrition status. The changes of dietary pattern among adult residents were analyzed. RESULTS: Among the residents, there were a 38.1% of decreased intake for grain (from 601.9 to 372.5 g/d), 20.5% for potato (from 75.6 to 60.1 g/d), 25.1% for beans (from 38.7 to 29.0 g/d), and a 77.2% of increased intake for fish and shrimp (from 25.0 to 44.3 g/d), 36.9% for livestock and poultry (from 65.6 to 89.8 g/d), 47.7% for fruit (from 70.7 to 104.4 g/d), and intake of milk product (from 5.8 to 21.3 g/d), egg (from 17.3 to 35.7 g/d), vegetable (from 296.1 to 316.3 g/d) were also increased from 1989 to 2006. During the period, the intake percentages of energy and protein from grain decreased from 67.5% (8.7 MJ/12.8 MJ per day) to 51.5% (5.0 MJ/9.6 MJ per day) and from 72.0% (66.2 g/91.9 g per day) to 59.7% (45.3 g/75.9 g per day), and on the contrary those from animal products increased from 8.9% (1.1 MJ/12.8 MJ per day) to 14.8 (1.4 MJ/9.6 MJ per day) and from 15.9% (14.6 g/91.9 g per day) to 27.9% (21.2 g/75.9 g per day), respectively. In 2006, the intake of vitamin A (508.9 µg/d) was 67.6% of it's RNI, intake of vitamin B(2) (0.9 mg/d) was 64.6% and the intake of calcium (453.7 mg/d) was 52.5% of it's AI among the residents. CONCLUSION: The intake of plant food decreased and that of animal food increased from 1989 to 2006 and the dietary intakes of calcium, vitamin A, vitamin B(2) need to be increased among adult population of Liaoning province.

Independent and combined associations between screen time and physical activity and perceived stress among college students.

Although both screen time (ST) and physical activity (PA) are associated with stress, independent and combined associations between ST and PA, and perceived stress among college students, have remained unclear. The present study included 1137 undergraduate medical students from a university in Shenyang, Northeast China. PA and perceived stress were measured using the International Physical Activity Questionnaire (IPAQ)-Long Form and the Chinese Perceived Stress Scale (CPSS), respectively. ST and students' characteristics were determined using a self-administered questionnaire. Data were analyzed using the independent t-test, Pearson Chi-squared test, and logistic regression. After adjusting for potential confounding factors, females reporting high ST (HST, ST > 6 h/day) were more likely to experience stress than those reporting low ST (LST, ST ≤ 6 h/day) (OR = 1.557), while those reporting light- and moderate-intensity PA (LMPA) were more likely to experience stress than those reporting vigorous-intensity PA (VIPA) (OR = 1.674). Analysis of the combined effects of PA and ST showed that, among female students, those reporting both LST and LMPA (OR = 2.174), both HST and VIPA (OR = 2.088), and both HST and LMPA (OR = 2.797) were more likely to experience stress compared to those reporting both LST and VIPA (the reference category). The present study confirmed that LST and VIPA were independently and concurrently associated with significantly lower stress among college students, suggesting that promoting PA and reducing ST might be an effective way to reduce perceived stress among college students.

Association Between Individual Components of Metabolic Syndrome and Cognitive Function in Northeast Rural China.

AIM: The aim of this article was to examine associations between metabolic syndrome and its individual components with cognitive function among rural elderly population in northeast China. METHODS: Our study included 1047 residents aged older than 60 years in a northeast rural area. All were interviewed and data were obtained including sociodemographic and medical histories. Cognitive function was assessed by Mini-Mental State Examination. Metabolic syndrome was defined by NCEP-ATP III. RESULTS: After adjusted for confounding factors, metabolic syndrome was inversely associated with cognitive function (odds ratio [OR] = 1.79; 95% confidence interval [CI]: 1.06-3.01) especially in participants aged less than 70 years old (OR = 2.60; 95% CI: 1.27-5.26). In addition, participants with metabolic syndrome had worse language function, which is a part of cognitive function (OR = 2.64; 95% CI: 1.39-5.00). Individual metabolic syndrome components, especially abdominal obesity and hyperglycemia, had significant association with cognitive function (OR = 0.72, 95% CI: 0.56-0.92 and OR = 1.41; 95% CI: 1.12-1.78, respectively). CONCLUSIONS: Abdominal obesity might be a protective factor for cognitive function. However, hyperglycemia might be a risk factor.

Effect of sun exposure on cognitive function among elderly individuals in Northeast China.

BACKGROUND: Previous findings on the relationship between serum 25-hydroxyvitamin D [25(OH)D] level and cognitive impairment have been inconsistent. One reason is that serum 25(OH)D has a relatively short half-life, but the development of cognitive impairment is a long-term process. Skin exposure to solar ultraviolet radiation is the primary source of vitamin D synthesis. For this study, we hypothesized that people with different sun exposure behaviors would have different cognitive functions. METHODS: This study included 1,192 rural-dwelling elders in People's Republic of China whose sun exposure behaviors, including the duration of outdoor activities, use of sun protection, and time of day participants engaged in outdoor activities, were collected. Their global cognitive function was assessed by Mini-Mental State Examination (MMSE). Partitioning cluster analysis was used to classify participants into groups based on their sun exposure behaviors. Ordinal logistic regression analysis was used to examine the association between sun exposure and cognitive function. RESULTS: The participants were divided into high-, medium-, and low-sun-exposure groups by cluster analysis. The participants in the high-sun-exposure group had the longest sun exposure time, reported the least sun-protective behaviors, and usually spent time outdoors in the morning (8:00-11:00) and afternoon (13:00-16:00). The participants in the low-sun-exposure group had the shortest sun exposure time, had the most positive sun-protective behaviors, and mainly spent time outdoors in the early morning (6:00-8:00) and late afternoon (16:00-18:00). After adjusting for potential confounders, participants with habitually high sun exposure were more likely to have higher MMSE score (25.4) than those with habitually low sun exposure (MMSE score =24.4). CONCLUSION: Long-term high sun exposure is positively related with better cognitive functioning.

[The prevalence of body overweight and obesity and its changes among Chinese people during 1992 to 2002].

OBJECTIVE: To describe the prevalence of body overweight and obesity and its changes among Chinese people during 1992-2002, and to provide scientific basis for developing intervention strategies for obesity in China. METHODS: The data from "1992 China third National Nutrition Survey" (78,704 subjects, 38,323 male and 40,381 female) and from "2002 China National Nutrition and Health Survey" (209,849 subjects, 101,377 male and 108,472 female) were used in this study. The overweight and obesity were defined by using WHO Z-score criteria for children younger than 7 years old, Chinese age-, sex-specific BMI criteria for children aged 7-17 years, and Chinese BMI criteria for adults. RESULTS: The overall prevalence of overweight and obesity of Chinese people was increased by 38.6% and 80.6%, respectively during the period of 1992-2002. The prevalence of overweight and obesity of Chinese people aged 0-6 years, 7-17 years, 18-44 years, 45-59 years and above 60 years was increased 31.7%, 17.9%, 66.7%, 45.2% and 43.7%, respectively. The increase of the prevalence of overweight and obesity was higher in girls younger than 6 years than their male counterparts, while among other age groups, that were higher in boys than girls. The prevalence of overweight and obesity among people living in rural areas was lower than that of their urban counterparts, while the increment of overweight and obesity prevalence among rural people was greater than that of their urban counterparts. It was estimated that another 70 million overweight and 30 million obese Chinese people emerged in China from 1992 to 2002. CONCLUSION: The prevalence of overweight and obesity of Chinese people was increased rapidly in the past decade, which had affected 260 million Chinese people. It would continue to increase in the near future if effective intervention measures have not been taken.

Joint Association of Dietary Pattern and Physical Activity Level with Cardiovascular Disease Risk Factors among Chinese Men: A Cross-Sectional Study.

The purpose of this cross-sectional study was to investigate the joint associations of physical activity level (PAL) and dietary patterns in relation to cardiovascular disease (CVD) risk factors among Chinese men. The study population consisted of 13 511 Chinese males aged 18-59 years from the 2002 China National Nutrition and Health Survey. Based on dietary data collected by a food frequency questionnaire, four dietary patterns were identified and labeled as "Green Water" (high consumption of rice, vegetables, seafood, pork, and poultry), "Yellow Earth" (high consumption of wheat flour products and starchy tubers), "New Affluent" (high consumption of animal sourced foods and soybean products), and "Western Adopter" (high consumption of animal sourced foods, cakes, and soft drinks). From the information collected by a 1-year physical activity questionnaire, PAL was calculated and classified into 4 categories: sedentary, low active, active, and very active. As compared with their counterparts from the New Affluent pattern, participants who followed the Green Water pattern had a lower likelihood of abdominal obesity (AO; 50.2%), hypertension (HT; 37.9%), hyperglycemia (HG; 41.5%), elevated triglyceride (ETG; 14.5%), low HDL (LHDL; 39.8%), and metabolic syndrome (MS; 51.9%). When compared to sedentary participants, the odds ratio of participants with very active PAL was 0.62 for AO, 0.85 for HT, 0.71 for HG, 0.76 for ETG, 0.74 for LHDL, and 0.58 for MS. Individuals who followed both very active PAL and the Green Water pattern had a lower likelihood of CVD risk factors (AO: 65.8%, HT: 39.1%, HG: 57.4%, ETG: 35.4%, LHDL: 56.1%, and MS: 75.0%), compared to their counterparts who followed both sedentary PAL and the New Affluent pattern. In addition, adherence to both healthy dietary pattern and very active PAL presented a remarkable potential for CVD risk factor prevention.

Obesity prevalence and time trend among youngsters in China, 1982-2002.

UNLABELLED: Purpose of present study is to describe the prevalence and trend of overweight and obesity, as well as its co-existence with stunting, among youngsters in China, from 1982 to 2002. Data from children 7-17 years of age from three cross-sectional national surveys: "1982 China National Nutrition Survey" (5,334 boys and 4,793 girls), "1992 China National Nutrition Survey" (8,048 boys and 7,453 girls) and "2002 China National Nutrition and Health Survey" (23,242 boys and 21,638 girls) were used in this study. Overweight and obesity were defined according to age, sex and specific BMI cut-off points from the International Obesity Task Force, while stunting was defined as height-for-age below -2 standard deviation from the NCHS/WHO reference median value. RESULTS: Overweight prevalence of Chinese youngsters was 1.2%, 3.7% and 4.4%, while the obesity prevalence was 0.2%, 0.9% and 0.9% in 1982, 1992 and 2002, respectively. Both the overweight and obesity prevalence and their increment were higher among boys in urban areas. In 1982, 28.4% of overweight and 69.6% of obese youngsters were stunted, this decreased to 22.0% and 46.4% in 1992, and then to 5.7% and 7.7% in 2002, respectively. CONCLUSION: The prevalence of overweight and obesity in Chinese youngsters were low in 1982. There has been a rapid increase since then. If this trend continues, overweight will soon reach epidemic proportions. Stunting among overweight and obese youngsters decreased dramatically at the same time.