Academic journal article Iranian Journal of Public Health

Prevalence and Trends of Obesity among Chinese Korean Nationality Children and Adolescents, 1991-2010

Academic journal article Iranian Journal of Public Health

Prevalence and Trends of Obesity among Chinese Korean Nationality Children and Adolescents, 1991-2010

Article excerpt

Introduction

Obesity had been recognized a risk factor for coronary heart disease, hypertension, diabetes and many other health disease. It is related to premature death and a heavy economic burden (?1).Obesity occurs in all age groups. In China, childhood obesity has become a serious health problem (?2, ?3). Unfortunately, most of the studies just gave attention to Han nationality children and adolescents. Few trustworthy and representative studies reported the prevalence of and trends in obesity about ethnic minorities. Among the 55 ethnic minorities, Chinese Korean nationality has the highest income level than other ethnic minorities. This is due to among 1.9238 million Chinese Korean nationalities, 23.5% people went abroad and worked in South Korea by the end of 2011 (?4). A good improvement in the economy would lead to a continuous increase in obesity rates (5). The prevalence of childhood obesity would change in these years.

Since many Chinese Korean people worked in South Korea each year. The diet culture and the way of life among Chinese Korean people were always affected by South Korean. The prevalence of childhood obesity might have the same trend with South Korean children. In South Korea, physical inactivity, an unbalanced diet, and excessive intake, have contributed to creating an obesogenic environment (?5). The prevalence of childhood obesity increased significantly and it doubled from 5.4% in 1998 to 10.8% in 2008 (?7, ?8). However, to Chinese Korean childhood obesity, we lack an accurate study, which would present the prevalence of, and trends in obesity among Chinese Korean children and adolescents. A high prevalence of childhood obesity would have adverse influence on their health. Therefore, it is urgent to have such a study, and this research would give policymakers sufficient information to make proper policies.

CNSSCH is utilized to monitor national trends in the health of students. Since 1991, CNSSCH data have been utilized to assess the obesity levels among all Chinese children and adolescents. The most recent data were collected in 2010. We use the data from these surveys to estimate the most recent obesity prevalence among Chinese Korean 7-18 yr old children, and to estimate the variation among different demographic and socioeconomic groups in 2010. Then we assessed the trends in childhood obesity prevalence, and changes of physical fitness from 1991 to 2010.

Methods

CNSSCH became a continuous survey from 1985, and it released its data every 5 yr. Our data were acquired from them. In 1985, CNSSCH just measure the Han nationality students. Therefore, our first data was from 1991. Standardized methodology was used in these complex multistage, crosssectional, nationwide surveys. At different time points, CNSSCH used the same sampling methods. The subjects were 7-18 yr old primary and secondary school students. Chinese Korean children and adolescents were randomly selected from Jilin provinces. In our study, subjects were sorted by region (urban or rural) and gender. Samples of the same size from three socioeconomic classes (lower, middle, upper) were selected in each of the four groups. CNSSCH selected three urban and three rural residential areas, respectively. A list of primary or secondary schools names and grade 1- 12 student's names was provided by a local area's Educational Committee. Primary and secondary schools were firstly and randomly selected. Then according to the size, two or three classes were randomly selected in each grade level (?3). This study's data were gathered in 1991, 1995, 2000, 2005, 2010 (N=4762, 4797, 4701, 5750, 5241).

The surveys were conducted in a moving examination center with a standardized physical examination. Ethical approval was obtained from Peking University's Medical Research Ethics Committee. Written informed consent was obtained from each participant and his or her parents before data collection. The surveys were abiding strictly by the same protocols at various times when select the sample and conduct the interviews and examinations (? …

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