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      Relationship between body mass index, waist circumference and waist circumference height ratio and bone metabolism markers in Yinchuan middle school students

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          Abstract

          Objective To analyze the relationship between body mass index (BMI), waist circumference (WC), waist to height ratio (WHtR) and bone metabolism markers.

          Methods By using the method of cluster sampling, a total of 1 084 adolescents aged 12 to 18 from one middle school in Yinchuan were investigated by questionnaire, physical examination and laboratory examination during sept. to Dec., 2018.

          Results BMI, WC and WHtR were significantly negatively correlated with Ca ( r = -0.10, -0.15, -0.15, P<0.05), and WC was negatively correlated with β-CTX ( r = -0.06 P<0.05). After adjusting for age, sex and vitamin D supplementation, WC had significant effects on Ca and β-CTX( β = -0.33, -0.22, P<0.05). Logistic regression analysis showed that there was no significant relationship between different types of obesity and the level of OC ( P>0.05) . The level of serum β-CTX in obese students was 1.93 times higher than that in normal students, Ca serum levels of obese students was 0.31 times higher than that in normal students that in abdominal obese students (defined as WC ) was 0.54 times higher than that in normal students.

          Conclusion BMI, WC and WHtR were correlated with OC, β-CTX and Ca in adolescents in Yinchuan city, and WC was more closely related to Ca and β-CTX, suggesting that obesity has a negative effect on bone absorption.

          Abstract

          【摘要】 目的 分析银川市中学生体质量指数 (BMI)、腰围 (WC)和腰围身高比 (WHtR) 与骨代谢标志物的关系, 为 评价青少年骨代谢状况提供依据。 方法 采用现况研究, 以方便整群抽样的方法于 2018 年 9一12 月共抽取银川市某中学 12〜18 岁青少年 1 084 名, 进行问卷调查、体格检查及实验室检测。 结果 BMI、WC、WHtR与Ca均呈负相关 ( r 值分别为 - 0.10, -0.15, -0.15), WC 与I型胶原交联 C 末端肽 (β-CTX) 呈负相关 ( r = -0.06) ( P 值均<0.05); 调整年龄、性别、维生素 D 补充情况等因素后, WC 对 Ca、β-CTX 的影响结果均有统计学意义( β 值分别为 -0.33, -0.22, P 值均<0.05)。Logistic 回 归分析结果显示, 不同肥胖类型与骨钙素 (OC) 水平无显著关系 ( P 值均>0.05), 血清 β-CTX 水平肥胖者增加是正常学生 的 1.93 倍, 血清 Ca 水平肥胖者与腹型肥胖者 (以 WC 定义) 增加分别是正常学生的 0.31 和 0.54 倍。 结论 银川市青少年 体内 BMI、WC 和 WHtR 与 OC、β-CTX、Ca 存在关联, 且 WC 与 Ca、β-CTX 的关系更为密切, 提示肥胖对骨吸收有负面 影响。

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          Author and article information

          Journal
          CJSH
          Chinese Journal of School Health
          Chinese Journal of School Health (China )
          1000-9817
          01 August 2020
          01 August 2020
          : 41
          : 8
          : 1224-1227
          Affiliations
          [1] 1School of Public Health and Management, Ningxia Medical University, Yinchuan (750004), China
          Author notes
          *Corresponding author: Ding Wenqing, E-mail: dwqdz@ 123456163.com
          Article
          j.cnki.1000-9817.2020.08.027
          10.16835/j.cnki.1000-9817.2020.08.027
          d8cdfeea-886e-4161-82a9-f85bf70aaa48
          © 2020 Chinese Journal of School Health

          This is an open-access article distributed under the terms of the Creative Commons Attribution 4.0 Unported License (CC BY-NC 4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. See https://creativecommons.org/licenses/by-nc/4.0/.

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          Self URI (journal-page): http://www.cjsh.org.cn
          Categories
          Journal Article

          Ophthalmology & Optometry,Pediatrics,Nutrition & Dietetics,Clinical Psychology & Psychiatry,Public health
          Body height,Students,Biological markers,Metabolism,Body mass index

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