OBJECTIVETo construct and compare the body mass index (BMI) cutoff points for defining overweight and obesity in school-age children and youths with Uygur and Han ethnic backgrounds in Xinjiang, China.

METHODSA total number of 9146 boys and girls in Urumqi, Xinjiang, aged 7-18 years, were recruited by stratifying and clustering sampling from April to June 2004. Demographic and anthropometric data, including body weight and standing height, were collected. Questionnaires and standard methods were used and BMI was calculated by weight/height2. BMI centile curves with age were drawn according to gender and ethnicity, using LMS software (Tim cole and Huiqi Pan) which were making the centile curves passing through 25 kg/m2 and 30 kg/m2, and 24 kg/m2 and 28 kg/m2 at age of 18 for overweight and obesity respectively.

RESULTSThe age and sex specific BMI centile curves were drawn for children with Uygur and Han ethnicities. Data showed that BMI increased with age. The centile of BMI curves, P94.46 and P99.58 for Uygur boys, P92.44 and P99.64 for Uygur girls, P85.05 and P97.26 for Han boys, P90.92 and P99.03 for Han girls, which passing through 25 kg/m2 and 30 kg/m2 by IOTF recommendation at age 18, were constructed. Under the basis of WGOC recommendation, the points that passing through 24 kg/m2 and 28 kg/m2 at age 18 were P90.54 and P98.86 for uygur boys, P86.96 and P98.77 for uygur girls, P78.98 and P94.72 for Han boys, P86.15 and P97.56 for Han girls. The BMI cutoff points for defining overweight and obesity were suggested.

CONCLUSIONTo the best of our knowledge, the present study established the BMI cutoff points for Uygur ethnic school-aged children and youths for identifying overweight and obesity. There was ethnic difference in the BMI distribution with age. We recommended using the BMI cutoff points proposed by the current study to identify those overweight and obese children in Urumqi.

Adolescent ; Body Mass Index ; Child ; China ; epidemiology ; ethnology ; Female ; Humans ; Male ; Obesity ; epidemiology ; ethnology ; Overweight ; epidemiology ; ethnology

OBJECTIVETo investigate obesity, overweight and related factors of Kazakh children aged from 6 to 13 years old in Yili, Xinjiang.

METHODSWith stratified cluster sampling method, 2438 Kazakh children aged 6 - 13 from eight elementary schools were recruited from the Yili Kazakh autonomy region from May to June in 2009. Height, weight, blood pressure, waist circumference and hip circumference were measured. Body mass index (BMI) value was used to determine overweight or obesity. The overweight and obesity distribution pattern of gender, age (6 - 7, 8, 9, 10, 11, 12, 13 - 14 years old group) and region (city, county and countryside) was analyzed. Logistic regression analysis was used to analyze the risk factors of overweight or obesity.

RESULTSThe prevalence of obesity and overweight in Yili Kazakh autonomy region was 1.64% (40/2438) (male: 1.62% (20/1232), female 1.66% (20/1206) (χ(2) = 0.69, P = 0.41)), and 5.13% (25/2438) (male: 4.79% (59/1232), female 5.47% (66/1206) (χ(2) = 0.59, P = 0.44)), respectively. The obesity prevalence of 6 - 7 year-old children was 3.72% (8/215), 2.30% (10/435) for 12 year-old group and 2.19% (6/274) for 13 - 14 year-old group. The difference of obesity and overweight prevalence among different age groups was significant (χ(2) = 14.29, P = 0.04). The prevalence of overweight was 8.77% (35/399), 6.92% (74/1069), 1.65% (16/970) (χ(2) = 42.09, P = 0.00) in city, county and countryside. And the prevalence of obesity was 2.75% (11/399), 2.43% (27/1069), 0.30% (3/970) (χ(2) = 18.13, P = 0.00) in city, county and countryside. Logistic regression analysis showed that children with family obesity history (OR = 2.73, 95%CI: 1.42 - 5.22) and culture level of fathers (OR = 1.65, 95%CI: 0.29 - 9.25) were independent risk factors of obesity. There was a correlation between blood pressure and waist-to-hip rate (r = 0.10, P = 0.00). Moreover, the correlation existed between systolic pressure (r = 0.47, P = 0.00), diastolic blood pressure (r = 0.37, P = 0.00) and BMI. Correlation existed between waist circumference (r = 0.81, P = 0.00), hip circumference (r = 0.78, P = 0.00) and BMI.

CONCLUSIONThere is no sex difference of overweight and obesity prevalence in Kazakh children aged from 6 to 13 year-old. Both family history of obesity and culture level of the fathers are factors of obesity and overweight to Kazakh children.

Adolescent ; Child ; China ; epidemiology ; Female ; Humans ; Male ; Obesity ; ethnology ; Overweight ; ethnology ; Prevalence ; Risk Factors

Objective: To examine the status and trends of overweight and obesity in children and adolescents aged 6-17 in Shenzhen between 2013 and 2017. Methods: Six primary schools, three junior high schools and three high schools were selected in Shenzhen from 2013 to 2017, through stratified cluster sampling method. Height and weight of the selected students were measured. Results: In total, 94 868 students were monitored from 2013 to 2017. The average prevalence rates of overweight and obesity were 13.31% and 9.60%, respectively. The prevalence rates of overweight and obesity appeared higher in boys (17.60% and 12.43%) than those in girls (10.27% and 5.93%). The prevalence of overweight was higher than obesity. Both prevalence rates of overweight and obesity were declining over the past five years. The maximal prevalence rates of overweight of boys and girls were from 10 to 12 and 13 to 15 years of age, while the obesity was from 6 to 9 years old, respectively. Conclusion: The prevalence rates of overweight and obesity were on the decline from 2013 to 2017, however, attention should be paid to the obesity problem in students.
Adolescent ; Body Mass Index ; Body Weight ; Child ; China/epidemiology* ; Female ; Humans ; Male ; Obesity/ethnology* ; Overweight/ethnology* ; Prevalence ; Schools ; Students

Objective: To explore the relationship between meat consumption and metabolic syndrome (MS) in Chinese adults aged ≥18 years. Methods: The data were obtained from 2010- 2012 National Nutrition and Health Survey. A total of 34 923 subjects who completed the dietary survey, the physical examination and had the testing results of blood sugar and blood lipid levels were enrolled in this study. MS was defined according to the diagnostic criteria of China Diabetes Society 2013. The prevalence ratios of MS and each form of MS and related 95%CI were calculated after post stratification weight according to the population data (2009) released by the national bureau of statistics. Results: The average meat intake among subjects was 94.8 g/d. People who had meat consumption between 100 g/d and 199 g/d had the lowest prevalence of MS, abdominal obesity and hyperglycemia. As the meat consumption increased, the prevalence of MS in men increased. Men who had meat consumption of ≥300 g/d had a higher risk of MS than those who had low level of meat consumption, with prevalence ratio equaled to 1.46 (95%CI: 1.14~1.87). Similar trend was not observed in women. Conclusion: Moderate intake of meat is associated with reduced risk of MS in Chinese adults.
Adolescent ; Adult ; China/epidemiology* ; Diet ; Female ; Humans ; Male ; Meat ; Metabolic Syndrome/ethnology* ; Obesity, Abdominal/ethnology* ; Prevalence ; Risk Factors

OBJECTIVETo examine the relationship between overweight or obesity and the risk of the various hypertension hemodynamic subtypes in Yi farmers and migrants.

METHODSA cross-sectional study of 2 358 Yi farmers and 1 392 Yi migrants was carried out in the Liangshan Yi autonomous prefecture, Sichuan, China in 2007.

RESULTSThe standardized prevalence of overweight in female Yi farmers (6.22%) was higher than in males (3.15%), whereas in Yi migrants 31.56% of males and 18.78% of females were overweight. The standardized prevalence of obesity was 0 and 0.61% in male and female Yi farmers, compared to 3.91% and 5.57% in male and female Yi migrants, respectively. For both genders the standardized prevalence of ISH, IDH, and SDH was higher in Yi migrants than Yi farmers. Overweight and obese Yi men and women had a higher risk for IDH and SDH (P<0.001) than non-overweight/obese individuals. However, an association of overweight or obesity with ISH was observed only in men.

CONCLUSIONYi migrants have substantially higher proportion of overweight and obese individuals, as well as individuals affected by ISH, IDH, and SDH, than do Yi farmers. Overweight and obesity are significant risk factors for the development of hypertension in Yi people.

Adolescent ; Adult ; Aged ; Body Mass Index ; China ; epidemiology ; Diastole ; Female ; Hemodynamics ; Humans ; Hypertension ; ethnology ; physiopathology ; Male ; Middle Aged ; Obesity ; ethnology ; physiopathology ; Overweight ; ethnology ; physiopathology ; Systole ; Young Adult

INTRODUCTIONThis study examines the prevalence of overweight and obesity in 6- to 72-month-old Chinese preschoolers in Singapore using 3 references.

MATERIALS AND METHODSThis was a population-based cross-sectional study of 3009 Chinese preschoolers aged 6 to 72 months from southwestern and western parts of Singapore. Overweight and obesity were defi ned by using the Center for Disease Control (CDC) (85th and 95th percentile, respectively), the International Obesity Task Force (IOTF) and the local National Health Group Polyclinics (NHGP), Singapore (90th and 97th percentile, respectively) references.

RESULTSThe prevalence of overweight and obesity in 24 to 72 months old Chinese children were 8.1% and 7.1% (the CDC reference), 7.6% and 3.9% (the IOTF reference) and 7.5% and 5.3% (the local reference [NHGP]) respectively. For preschoolers aged 6 to 72 months, the prevalence of overweight and obesity was 7.0% and 5.3%, respectively, using the local reference. An increasing trend in the prevalence of obesity with increasing age was seen in both genders, using the CDC and IOTF references (P ≤0.001 and 0.001, respectively). The boys were more likely to be obese than the girls using the CDC reference (OR = 1.42, 95% CI, 1.02 to 1.97, P = 0.03).

CONCLUSIONOur study showed a lower prevalence of overweight and obesity among Chinese preschoolers in Singapore when compared to other countries like the United States, Italy, Chile using the CDC and/or IOTF references. The CDC reference overestimated whereas the IOTF reference underestimated the prevalence of overweight and obesity for our population when compared to using the local NHGP reference.

Body Mass Index ; Child ; Child, Preschool ; China ; ethnology ; Cross-Sectional Studies ; Female ; Humans ; Infant ; Male ; Obesity ; diagnosis ; ethnology ; Overweight ; diagnosis ; ethnology ; Prevalence ; Sex Distribution ; Singapore ; epidemiology

OBJECTIVETo investigate the prevalence of obesity and distribution of body mass index (BMI) in school children of four ethnic groups in Urumqi, Xinjiang, China.

METHODSA total of 55508 school children of Han, Hui, Uygur and Kazak nationalities aged 8-18 years were selected by a cluster sampling from a districts of Urumqi City for anthropometric measurement and demographic survey. Prevalence of obesity and overweight and distribution of body mass index (BMI) by gender, age, and nationality were analyzed and compared. Cutoff points of BMI for defining obesity and overweight were based on the proposal set by the Working Group on Obesity in China (WGOC) to assess age-, gender- and nationality-specific prevalence of obesity and overweight.

RESULTSPrevalence of obesity was 5.34%, 6.78%, 3.39 %, and 1.22% for boys and 2.61%, 1.83%, 1.78%, and 1.40% for girls of Han, Hui, Uygur and Kazak nationalities, respectively. Prevalence of obesity tended to decrease with age overall, whereas that of overweight increased with age in Han children.

CONCLUSIONSPrevalence of obesity in school children in Urumqi varies with their nationalities and is lower than that of an average national level and a level of western countries. Obesity is more prevalent in boys than in girls of Urmuqi overall, which is just the opposite in Kazak children. Han boys and Hui girls have the highest prevalence of obesity and Kazak boys and girls have the lowest ones. Prevalence of obesity decreases with age, but that of overweight shows a different trend.

Adolescent ; Body Mass Index ; Child ; China ; epidemiology ; Female ; Humans ; Male ; Obesity ; ethnology ; Prevalence ; Sex Factors

INTRODUCTIONCurrent international Royal College of Obstetricians and Gynaecologists (RCOG) guidelines list maternal obesity (body mass index [BMI] ≥ 30.0 kg/m2) as a risk factor for venous thromboembolism (VTE). Although the World Health Organization (WHO) has recommended lower BMI cutoff points for Asians when risk stratifying for diseases associated with obesity, this has not been extended to maternal obesity. In the present study, we compared the difference in using Asian-specific BMI cutoff points as opposed to those in international guidelines in determining the population at risk for VTE, as defined by RCOG guidelines.

METHODSAll spontaneous deliveries (n = 94) and Caesarean sections (n = 41) over a three-week period, and instrumental deliveries (n = 15) over a two-month period, were reviewed and risk stratified based on Asian-specific, as well as international, BMI cut-off points.

RESULTSFor the group that underwent spontaneous vaginal delivery, the percentage of patients at risk for VTE nearly doubled (from 8.5% to 16.0%) with the revised risk stratification, while that of patients who had instrumental delivery had more than a two-fold increase (250%). In the initial risk stratification of the post-Caesarean patients, none were at high risk of VTE. However, when the lower cut-off points of 27.5 kg/m2 and 23.0 kg/m2 were used, one and three patients were respectively identified to be at high risk.

CONCLUSIONFurther research and consideration regarding the adjustment of international risk stratification guidelines to accommodate population-specific differences are required so that at-risk patients are not missed.

Adult ; Body Mass Index ; Female ; Humans ; Obesity ; complications ; Practice Guidelines as Topic ; Pregnancy ; Pregnancy Complications, Hematologic ; ethnology ; etiology ; Retrospective Studies ; Risk Assessment ; Risk Factors ; Singapore ; Venous Thromboembolism ; ethnology ; etiology

OBJECTIVETo investigate the prevalence and distribution features of overweight, obesity and abdominal obesity among rural adult residents in Hazakh and Uygur population in Xinjiang province, 2010.

METHODSQuestionnaire-based survey and physical examination were conducted towards the 8611 subjects selected from Hazakh and Uygur residents aged over 18 years old in Yili Xinyuan County and Kashi Jiashi County in Xinjiang province by stratified cluster random sampling method; and thereby the results were analyzed and compared between the two ethnic populations.

RESULTSThe prevalence of overweight in Hazakh(male: 29.5% (612/2078) and female: 26.4% (789/2991)) was higher than that in Uygur(male: 25.5% (440/1728) and female: 21.9% (397/1814)). The difference showed statistical significance (male: χ(2) = 7.50, female: χ(2) = 12.27, P < 0.01). The prevalence was higher in males than in females among the same ethic population (Hazakh: χ(2) = 5.79, Uygur: χ(2) = 6.28, P < 0.05). The prevalence of obesity in Hazakh(male:18.2% (379/2078) and female:18.1% (540/2991)) was higher than that in Uygur(male: 9.4% (163/1728) and female: 13.2% (240/1814)). The difference showed statistical significance (male: χ(2) = 59.90, female: χ(2) = 19.32, P < 0.01). The female prevalence was higher than male in Uygur (χ(2) = 12.66, P < 0.01); however, there was no statistically significant difference in the prevalence stratified by gender in Hazakh. The prevalence of abdominal obesity in Hazakh(male: 57.0% (1185/2078) and female: 60.2% (1801/2991)) was higher than that in Uygur(male: 46.9% (811/1728) and female: 59.5% (1080/1814)). The difference showed statistical significance (male: χ(2) = 38.54, P < 0.01; female: χ(2) = 0.216, P > 0.05). And the female prevalence was both higher than male in the two ethic populations (Hazakh: χ(2) = 5.15, P < 0.05; Uygur: χ(2) = 56.50, P < 0.01).

CONCLUSIONThe prevalence abdominal obesity among rural adult residents in Hazakh and Uygur population was much higher than the average level nationwide in China. Hazakh had a higher prevalence of overweight and obesity than Uygur.

Adult ; China ; epidemiology ; Ethnic Groups ; Female ; Humans ; Male ; Middle Aged ; Obesity ; epidemiology ; ethnology ; Overweight ; epidemiology ; ethnology ; Population Surveillance ; Risk Factors ; Rural Population ; Surveys and Questionnaires

OBJECTIVETo analyze the associations between birth weight and overweight/obesity among children.

METHODSA total of 8 267 twin pairs younger than 18 years old from the Chinese National Twin Registry were included in the study. Associations between birth weight, childhood BMI and overweight/obesity were explored by this co-twin control study.

RESULTSAfter adjusting for sex and zygosity, when birth weight had an increase of 0.5 kg per fold, the OR values for overweight and obesity were 1.87(95%CI: 1.40-2.48) for 2-6 year olds, 1.69 (95%CI: 1.16-2.46) for 6-12 year olds and 1.28 (95%CI: 0.80-2.07) for 12-18 year olds.

RESULTSfrom the stratified analysis in the 2-6 year-olds, statistically significant differences were seen. When birth weight increased 0.5 kg per fold, the risk of overweight and obesity increased by 0.87 times among the dizygotic twins, more than that of the monozygotic twins (OR=1.86, 95%CI:1.24-2.81). The risk for male twins was 1.12 times higher than that of female twins (OR=1.65, 95%CI:1.11-2.44).

CONCLUSIONSBirth weight seemed associated with overweight and obesity for kids at early childhood or at age for schools. However, guidance on the implementation of public health interventions is still needed on these children.

Adolescent ; Birth Weight ; Child ; Child, Preschool ; China ; epidemiology ; Female ; Humans ; Male ; Obesity ; ethnology ; Overweight ; ethnology ; Registries ; Risk ; Twins, Dizygotic ; Twins, Monozygotic