[Eating out behavior of residents aged 6 and above in China from 2015 to 2017].

OBJECTIVE: To analyze the eating out behavior of Chinese residents aged 6 and above from 2015 to 2017. METHODS: Using the data of eating out behavior in the past week from China Nutrition and Health Surveillance(2015-2017), after data cleaning, a total of 150 682 subjects were included in this study, including 80 703 in 2015 and 69 979 in 2016-2017. The percentage of cases were used to describe the eating behaviors of different characteristics of the population, Chi-square test was used to comparative analysis. RESULTS: From 2015 to 2017, proportions of eating out for all the three meals was 46.3% of Chinese residents aged 6 and above in the past week, that of were 69.7%, 84.6%, 33.2%, 19.8% and 9.1% of Chinese residents aged 6 to 11, 12 to 17, 18 to 44, 45 to 59 and 60 and above, respectively. The proportion of urban and rural residents eating out in the past week were 52.8% and 41.2%, respectively, the difference was statistically significant(P<0.05). The proportion of male and female residents eating out in the past week were 49.6% and 43.1%, respectively, the difference was statistically significant(P<0.05). Proportions of eating out for breakfast, lunch and dinner were 31.4%, 37.2% and 21.4% respectively of Chinese residents, that of were 17.3%, 29.1% and 15.1% of Chinese residents eating breakfast, lunch and dinner in work/school canteens. CONCLUSION: Children aged 6 to 17 years old are the key groups for eating out. Among adults aged 18 and above, residents aged 18 to 44 have the highest proportion of eating out. Proportions of eating out for lunch is the highest and the main eating-out place is the canteen for Chinese residents.

[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.

Relationship between Dining Place, Iodine Source, and Iodine Nutrition in School-Age Children: A Cross-Sectional Study in China.

Objective: This study assesses the impact of iodine-rich processed foods and dining places on the iodine nutritional status of children. Methods: School-aged children (SAC) in seven provinces in China were selected by school-based multi-stage sampling. Urinary iodine, salt iodine, and thyroid volume (TVOL) were determined. Questionnaires were used to investigate dining places and iodine-rich processed foods. The water iodine was from the 2017 national survey. Multi-factor regression analysis was used to find correlations between variables. Results: Children ate 78.7% of their meals at home, 15.1% at school canteens, and 6.1% at other places. The percentage of daily iodine intake from water, iodized salt, iodine-rich processed foods, and cooked food were 1.0%, 79.2%, 1.5%, and 18.4%, respectively. The salt iodine was correlated with the urinary iodine and TVOL, respectively (r = 0.999 and -0.997, P < 0.05). The iodine intake in processed foods was weakly correlated with the TVOL (r = 0.080, P < 0.01). Non-iodized salt used in processed foods or diets when eating out had less effect on children's iodine nutrition status. Conclusion: Iodized salt remains the primary source of daily iodine intake of SAC, and processed food has less effect on iodine nutrition. Therefore, for children, iodized salt should be a compulsory supplement in their routine diet.