Association between times spent on the internet and weight status in Korean adolescents

This study investigates whether the amount of time that Korean adolescents spend on the Internet per day is related to their weight status. For this purpose, we analyzed data from the 2009 Korea Youth Risk Behavior Web-based Survey-V [KYRBWSV], in which 72,399 students from the 7[th] to the 12[th] grade participated. We assessed the relationship between the amount of time spent on the Internet per day and body mass index [BMI] by using multivariate logistic regression analysis. For boys, the odds ratio [OR; confidence interval [CI]: 95%] between becoming overweight and the amount of time spent on the Internet per day was 1.225 [1.042-1.441; P=0.014] for >4 hour. The ORs [CI: 95%] between becoming obese and time spent on the Internet per day were 1.238 [1.096-1.399; P=0.001] for >2- 3- 4 hours. For girls, the ORs [CI: 95%] between becoming overweight and time spent on the Internet per day were 1.265 [1.089-1.469; P=0.002] for >2- 3- 2- 3-

Prevalence of obesity in adolescents with history of pregnancy and associated factors in Korea

The pregnancy was a risk factor for excessive gain for women. However, there is no information about the prevalence of obesity and its relationship with a history of pregnancy in girls. Therefore, the purpose of this study was to investigate differences in the prevalence of obesity in adolescent females with a history of pregnancy and factors associated with it, in Korea. In 2009, 69 of 34,247 female students revealed that they had experienced pregnancy in response to the 5[th] Korea Youth Risk Behavior Web-based Survey [KYRBWS-V] project by the Korea Centers for Disease Control and Prevention [KCDCP]. The body mass index [BMI] and experienced pregnancy categories of the KYRBWS-V were assessed, and, for data analysis, the independent t-test, chi-square test, and multivariate logistic regression were used. The risk of pregnancy was increased by approximately 47% per unit increase in age, and 331% per unit increase in depression, respectively. Conversely, the risk decreased by 19% per unit increase in BMI and 33% per unit increase [ranged from 1: very rich to 5: very poor] in the family economic state. Obesity in adolescent females is minimally affected by a history of pregnancy, if at all, despite the fact that pregnancy was risk factor for excessive weight gain in women. However, adolescent females with a history of pregnancy have higher levels of depression than do normal peers in Korea