Association Between Osteosarcopenic Obesity and Hypertension Among Four Minority Populations in China: a Cross- Sectional Study

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Association Between Osteosarcopenic Obesity and Hypertension Among Four Minority Populations in China: a Cross- Sectional Study Open access Research BMJ Open: first published as 10.1136/bmjopen-2018-026818 on 18 July 2019. Downloaded from Association between osteosarcopenic obesity and hypertension among four minority populations in China: a cross- sectional study Xingcai Chen,1 Cunqing Kong,1 Hongrong Yu,1 Jiangu Gong,1 Ling Lan,1 Lining Zhou,1 Jichun Gong,1 Peng Liu,1 Lin Xu,1,2 Qiongying Deng1,2 To cite: Chen X, Kong C, Yu H, ABSTRACT Strengths and limitations of this study et al. Association between Objective Osteosarcopenic obesity (OSO) may be osteosarcopenic obesity and associated with an increased prevalence of hypertension. ► To the best of our knowledge, this study is the first hypertension among four The aim of this study was to examine the difference in the minority populations in China: a to explore the association between osteosarcopenic prevalence of OSO and hypertension among four minority cross-sectional study. BMJ Open obesity (OSO) and hypertension by sex among mi- populations in China and explore the relationship between 2019;9:e026818. doi:10.1136/ nority groups in China. OSO and hypertension by sex. bmjopen-2018-026818 ► This study is based on the four minority populations Design This study adopted a cross-sectional design. in China, and these groups are regarded as isolated ► Prepublication history for Participants In total, 1939 participants aged ≥50 years, populations because of intraethnic marriages. this paper is available online. including 459 Jing, 514 Maonan, 535 Hmong and 431 Yao To view these files please visit ► The cross-sectional design of this study prevented participants from Guangxi Province, China, were included the journal online (http:// dx. doi. us from drawing any causal inferences about the using stratified cluster random sampling. org/ 10. 1136/ bmjopen- 2018- potential effect of OSO on hypertension. 026818). Main outcome measures The body composition, bone mineral density and blood pressure were measured by XC and CK contributed equally. an MC-180 body composition analyser, Achilles Express ultrasound bone densitometer and OMRON HEM-1000 that osteoporosis, sarcopenia and obesity are Received 22 September 2018 electronic sphygmomanometer, respectively. Revised 11 April 2019 interconnected through a common patho- Results The results showed that 65.77% of Hmong men, 2 3 http://bmjopen.bmj.com/ Accepted 30 May 2019 physiology. 58.79% of Hmong women, 54.82% of Maonan men, 50.00% of Maonan women, 41.92% of Jing men, 45.21% Therefore, the concept of osteosarcopenic of Jing women, 53.66% of Yao men and 42.32% of Yao obesity (OSO) syndrome was established in women suffered from hypertension. Compared with those the scientific literature to better understand among the normal group, the adjusted OR and 95% CI of the association between the changes in body age among the women with OSO was 3.15 (1.13 to 8.78). composition and certain chronic diseases. After adjusting for age, ethnicity, smoking status, alcohol OSO is a newly identified condition char- consumption, physical activity and menopausal status, the acterised by the concurrent occurrence of women with OSO also had a higher OR (OR=3.18, 95% CI sarcopenia, osteoporosis and obesity.4 Each on September 28, 2021 by guest. Protected copyright. 1.14 to 8.88) for hypertension than those in the normal © Author(s) (or their of these three conditions is associated with employer(s)) 2019. Re-use group. However, the ORs (95% CI) for hypertension in men permitted under CC BY-NC. No with one or more components were not significant after common complications, such as fragility frac- 5 commercial re-use. See rights adjusting for age and ethnicity. tures. In combination, sarcopenia, osteopo- and permissions. Published by Conclusion These results suggest that OSO is a risk rosis and obesity are considered to be related BMJ. factor for hypertension, especially in women. Furthermore, to worse events than each condition alone.1 2 1 Department of Human Anatomy, the prevalence of OSO and hypertension in the present Hypertension, which is a multifactorial Guangxi Medical University, study displayed sex-specific and ethnic-specific Nanning, China disease involving environmental and genetic differences among the four minority populations. 2Guangxi Colleges and factors and risk-conferring behaviours, Universities Key Laboratory remains the most common chronic disease of Human Development and worldwide.6 7 Doumas et al noted that cardio- Disease Research, Guangxi Medical University, Nanning, INTRODUCTION vascular morbidity and mortality present some China Ageing can be accompanied by unfavourable differences between male and female hyper- 8 changes in body composition, such as low tensive patients. According to Regitz-Zagro- Correspondence to bone mass (osteoporosis), decreased muscle sek’s report, hypertension is more common Professor Lin Xu; mass and strength (sarcopenia) and increased in women than men in the elderly popu- 280840607@ qq. com and 9 Professor Qiongying Deng; adiposity (obesity), especially in older lation. However, one study conducted in dengqy@ gxmu. edu. cn women.1 Numerous studies have suggested Nepal showed that prehypertension and Chen X, et al. BMJ Open 2019;9:e026818. doi:10.1136/bmjopen-2018-026818 1 Open access BMJ Open: first published as 10.1136/bmjopen-2018-026818 on 18 July 2019. Downloaded from hypertension occurred more frequently in males than protocol in each village. All participants provided written famales.10 informed consent prior to participation in this study. According to one study conducted by Liu et al, Y-STR haplotypes in minority populations in Guangxi are highly Measures polymorphic and have high discriminatory power.11 These Height was measured by an altimeter with the participants minority populations have been regarded as isolated popu- standing barefoot. The circumferences of the waist and lations.12 However, due to limited financial and human hips were measured with an inelastic measuring tape with resources, we conducted a survey involving only Hmong, the participants in their underwear. The waist-to-hip ratio Maonan, Jing and Yao populations. The Jing, Maonan, (WHR) was defined as the waist circumference divided by Hmong and Yao populations are isolated minority groups the hip circumference. All length indexes were measured in the Guangxi Zhuang Autonomous Region, China. to the nearest 0.1 cm. The Jing population is the only oceanic ethnic group in The body composition was measured with a bioelectric China, and a very small minority population of 28 199 impedance analysis. The MC-180 body composition anal- was reported in 2010.13 Compared with the Jing popu- yser, which was manufactured by the Japanese TANITA, lation, the Maonan, Hmong and Yao groups reportedly has high sensitivity and specificity and was adjusted daily had slightly larger populations of 101 192 (0.0076%), before the measurements to minimise measurement 9 426 007 (0.7072%) and 2 796 003 (0.2098%), respec- errors. The participants were instructed to fast, refrain tively, in 2010.14 In addition, their special customs and from strenuous exercise for 4 hours or more and refrain culture, including their clothing, intraethnic marriages, from drinking for 1 hour before testing. Any metal items dietary habits and lifestyle factors, differ among the were removed from the participants to ensure the accu- groups and especially from Han Chinese.15–17 However, racy of the measures prior to the measurement. The knowledge regarding the differences in the prevalence of participants were positioned on the analyser’s surface hypertension and association between OSO and hyper- barefoot according to the manufacturer’s specifications. tension among these minority groups is limited. The body composition indexes included the body mass The aim of this study was to examine the difference index (BMI), percentage of body fat (PBF), fat-free in the prevalence of OSO and hypertension in the four mass (FFM), fat mass (FM) and appendicular lean mass minority groups in Guangxi and explore the relationship (ALM). The BMI was calculated as the weight divided by between OSO and hypertension by sex. the square of the height (kg/m2). PBF was calculated as the proportion of FM to the total body weight. ALM was calculated as the sum of the arm and leg lean mass. All mass indexes were measured to the nearest 0.1 kg. METHODS Quantitative ultrasound bone density measurements http://bmjopen.bmj.com/ Study design and participants of the right calcaneus were performed in all participants This study adopted a cross-sectional design and was using an Achilles Express ultrasound bone densitom- funded by the National Natural Science Foundation of eter (GE, USA); the parameters included the speed of China. Ethical approval was provided by the Medical sound (SOS), broadband ultrasound attenuation (BUA) Ethics Committee of Guangxi Medical University. In and stiffness index (SI). The SI was calculated automat- this study, the following inclusion criteria were used: (1) ically by the system software according to the following participants aged ≥50 years; (2) men and non-pregnant formula: SI=(0.67×BUA+0.28 ×SOS)–420.18 The T-score women and (3) healthy adults without a history of frac- was calculated based on the normal reference value of on September 28, 2021 by guest. Protected copyright. tures or major diseases. Correspondingly, the following BMD in a young and healthy population and matched exclusion criteria were used: (1) a history of traumatic by gender and ethnic group. According to the WHO fractures or serious metabolic, cardiovascular or endo- criteria,19 the BMD was classified into the following three crine diseases; (2) pregnant or lactating women and (3) categories: osteoporosis based on a T-score value of −2.5 the use of medications that may affect bone metabolism, or lower; osteopenia based on a T-score value between including statins, glucocorticoids, thiazolidinediones and −1.0 and −2.5 and normal bone mass based on a T-score antiepileptic medications. value above −1.0.
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