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Objective To investigate the accuracy of body mass index (BMI) as the evaluation standard for obesity in Miao adults in Guangxi, to find out the BMI cutoff value suitable for the evaluation standard of adult obesity, and to provide an accurate and reliable reference value for the prevention and treatment of obesity in Miao nationality adults. Methods Using a cross-sectional design, residents aged 18 years or older in the Miao villages in Rongshui Miao Autonomous County, Guangxi, were selected as the research subjects, and their body composition was measured. The percent body fat (PBF) standard was used as the “gold standard” for obesity, and the BMI standard for obesity in Chinese adults was used as the positive screening standard. The accuracy of the BMI standard was evaluated, and the ROC curve analysis was used to determine the optimal BMI cutoff value for obesity in Miao adults. Results The detection rate of obesity of Miao adults in Guangxi by BMI method was lower than that by PBF method (10.3% vs 19.0%, χ2=426.62, P“gold standard”, BMI had a good diagnostic performance for obesity in Miao adults (AUC=0.959, P2 and 25.55 kg/m2 for men and women, respectively. Conclusion BMI is of great value for the diagnosis of obesity in Miao adults, but it should not be used as an exclusion criterion for obesity. Especially in the case of a small sample size, the risk of misclassification bias is relatively high.
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BACKGROUND: Studies have shown that osteoporosis, sarcopenia and obesity are important factors affecting metabolic diseases such as fracture, hypertension and dyslipidemia. OBJECTIVE: To describe the prevalence and influencing factors of osteosarcopenic obesity and its effects on racture and dyslipidemia, and to explore the role of diet and exercise in preventing osteosarcopenic obesity, so as to provide theoretical basis for the prevention and treatment of osteosarcopenic obesity METHODS: The related articles Included In PubMed and WANFANG database published from 1990 to 2018 were searched using the following keywords: Osteosarcopenlc obesity, sarcopenlc obesity, osteoporosis, sarcopenla, obesity, fracture, dysllpldemla, osteosarcopenlc obesity syndrome. The language was limited to “English” or “Chinese.” A total of 71 articles were Included for analysis and discussion. RESULTS AND CONCLUSION: (1) The age, sex, nationality or race differences in prevalence of osteosarcopenlc obesity have been found. The diagnostic criteria of osteosarcopenlc obesity, not international standard, have been established in the United States, Europe, Asia and others continents or countries; (3) Osteosarcopenlc obesity is affected not only by living and eating habits, but also by genes, cytokines and metabolic hormones. (4) Osteosarcopenic obesity exerts greater impact on fracture and dyslipidemia compared with osteoporosis, sarcopenia and obesity alone.
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BACKGROUND: Studying the relationship between flexibility and body composition of college students is of great significance for enhancing the levels of physical health and sports. OBJECTIVE: To investigate the relationship between sit-and-reach and body composition of college students in Guangxi Zhuang Autonomous Region and differences between sexes. METHODS: Totally 2 175 students from a Guangxi university were randomly selected. Body composition was determined by the MC-180 body composition tester. The students were divided into four groups: ≤ 12.10 cm group,＞ 12.10-16.40 cm group,＞ 16.40-20.70 group and＞ 20.70 group according to quartile of sit-and-reach measured in accordance with the National Physical Health Test Standard. All data were processed by SPSS 22.0 software. RESULTS AND CONCLUSION: Sit-and-reach was significantly correlated with body mass index, percentage of body fat, fat-free mass index, upper limb lean mass and lower limb lean mass (P ＜ 0.05), and percentage of body fat was negatively correlated with sit-and-reach (P ＜ 0.05). The body mass index, fat-free mass index, upper limb lean mass and lower limb lean mass in the ≤ 12.10 cm group were significantly lower than those in the other groups. Fat-free mass index and upper limb lean mass were correlated with sit-and-reach in male college students (P ＜ 0.05). The fat-free mass index and upper limb lean mass in the＞ 16.40-20.70 cm group were significantly higher than those in the ≤ 12.10 cm group. Therefore, there is a positive correlation between the flexibility and fat-free mass index and upper limb lean mass in college students.