Relationship between eating out and overweight， obesity， and fatty liver disease in adult residents in a suburban area of Shanghai

Objective To investigate the prevalence of overweight， obesity and fatty liver disease （FLD） in adult residents in a suburban area of Shanghai， and to explore the relationship between these conditions and eating out of home （EOH）.

Methods Adult residents from Zhongshan Street， Songjiang， Shanghai， were invited to report their frequency of EOH and undergo a physical examination using B-ultrasonography from May to September 2017. Binary logistic regression analyses were conducted to examine the relationship between EOH and conditions of overweight， obesity， and FLD.

Results Among the final sample size of 6 608 participants， the prevalence rates of overweight， obesity， and FLD were 41.65%， 14.71% and 38.29%， respectively. After adjusting for potential confounders， logistic analyses revealed that participants with an EOH frequency > once/week had a 1.44-fold higher prevalence of obesity （P=0.006）， a 1.35-fold higher prevalence of overweight/obesity （P=0.005）， and a 1.36-fold higher prevalence of FLD （P=0.008）.

Conclusion The prevalence of overweight， obesity， and FLD is relatively high in Songjiang， Shanghai. EOH may be a risk factor for these diseases， and residents are recommended to reduce the frequency of EOH.