Article(id=1325502224541037154, tenantId=1146029695717560320, journalId=1256213402557890569, issueId=1325502070660407522, articleNumber=null, orderNo=null, doi=10.16835/j.cnki.1000-9817.2025133, pmid=null, cstr=null, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=null, receivedDate=1738598400000, receivedDateStr=2025-02-04, revisedDate=1741795200000, revisedDateStr=2025-03-13, acceptedDate=null, acceptedDateStr=null, onlineDate=1793953956970, onlineDateStr=2026-11-06, pubDate=1748102400000, pubDateStr=2025-05-25, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1793953956970, onlineIssueDateStr=2026-11-06, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1793953956970, creator=13701087609, updateTime=1793953956970, updator=13701087609, issue=Issue{id=1325502070660407522, tenantId=1146029695717560320, journalId=1256213402557890569, year='2025', volume='46', issue='5', pageStart='609', pageEnd='760', issueExtLink='null', onlineDate='null', pubDate='1748102400000', pubDateStr='2025-05-25', beforeIssueId=null, nextIssueId=null, price=null, status=1, issueComplete=1, articleOrder=1, issueType=-1, specialIssue=null, createTime=1793953920283, creator='13701087609', updateTime=1793953920283, updator='13701087609', preIssue=null, nextIssue=null, articleTotal=null, ext=null, issueFiles=null, downloadFileDto=null}, startPage=647, endPage=650, ext={EN=ArticleExt(id=1325502225551864420, articleId=1325502224541037154, tenantId=1146029695717560320, journalId=1256213402557890569, language=EN, title=Vitamin D and ferritin nutritional status among primary and secondary school students in the key nutrition monitoring counties of Xinjiang, columnId=1259565862625862592, journalTitle=Chinese Journal of School Health, columnName=Student Nutrition, runingTitle=null, highlight=null, articleAbstract=
Objective

To analyze the relationship between vitamin D and ferritin nutritional status with physical indicators in primary and secondary school students in the key nutrition monitoring counties of Xinjiang, so as to provide reference for early prevention and intervention of students' nutrition issues.

Methods

From November to December 2023, 1 071 students aged 6-18 from key nutrition monitoring counties in the Xinjiang Nutrition Improvement Plan area were selected via stratified random sampling for physical and biochemical tests. The U test and Kruskal-Wallis H test were used to compare the differences in physical indicators and the distribution of vitamin D and ferritin levels. Chi-square test was used to compare the prevalence of vitamin D and ferritin deficiencies among different groups of primary and secondary school students. Pearson correlation was used to analyze the relationship between the nutritional levels of vitamin D and ferritin and physical indicators.

Results

The median vitamin D level was 14.7 (10.7, 19.0)ng/mL, with deficiency and insufficiency rates of 30.8% and 37.4% among primary and secondary school students in the key nutrition monitoring counties of Xinjiang Nutrition Improvement Plan area. Ferritin levels were 57.4 (37.7, 83.9)μg/L, with a deficiency rate of 5.7%. Males, primary school students, and rural residents had higher vitamin D and ferritin levels than females, secondary school students, and urban residents (U=-11.35, -6.88, -4.52; -3.94, -9.17, -5.23, P < 0.05). Vitamin D deficiency was more prevalent in females, secondary school students, and urban students (χ2=97.52, 49.01, 21.89, P < 0.05), while ferritin deficiency was higher in primary school students and urban areas (χ2=34.11, 5.63, P < 0.05). Significant differences in body mass index (BMI) and waist circumstance (WC) were observed across vitamin D/ferritin statuses (U/H=35.47, 22.82; -4.19, -5.36, P < 0.05). Vitamin D and ferritin levels negatively correlated with age, BMI, and WC but positively with waist-to-height ratio (WHtR) (r=-0.31, -0.19, -0.19, 0.20; -0.32, -0.13, -0.21, 0.08, P < 0.05).

Conclusions

Vitamin D and ferritin levels in primary and secondary school students in key nutritional monitoring counties in Xinjiang are correlated with age, BMI, WC and WHtR, and there are nutrient deficiencies. Targeted measures are recommended to improve nutritional status and physical health.

, authors=Najimai·Maimaitiaili1, Daniel·Abuduwaili2, Xixi DENG1, Aiyireti·Maimaiti2, Qin LIN2, Rongxiang XIA2, Wei ZHE*, 2, authorsList=Najimai·Maimaitiaili, Daniel·Abuduwaili, Xixi DENG, Aiyireti·Maimaiti, Qin LIN, Rongxiang XIA, Wei ZHE, authorCompany=null, correspAuthors=Wei ZHE, authorNote=null, correspAuthorsNote=null, copyrightStatement=Copyright ©2025 Chinese Journal of School Health. All rights reserved., copyrightOwner=null, extLink=null, articleAbsUrl=null, sourceXml=null, magXml=null, pdfUrl=null, pdf=null, pdfFileSize=null, pdfExtLink=null, richHtmlUrl=null, mobilePdfUrl=null, reviewReport=null, pdfFirstPage=null, abstractGraph=null, abstractGraphContent=null, abstractVideo=null, citation=null, cebUrl=null, magXmlContent=null, mapNumber=null, fund=null), CN=ArticleExt(id=1325502226181010021, articleId=1325502224541037154, tenantId=1146029695717560320, journalId=1256213402557890569, language=CN, title=新疆重点营养监测县中小学生维生素D和铁蛋白营养状况, columnId=1259565866560119750, journalTitle=中国学校卫生, columnName=学生营养, runingTitle=null, highlight=null, articleAbstract=
目的

分析新疆重点营养监测县中小学生维生素D、铁蛋白营养状况及与体格指标的关系,为学生营养问题的早期预防和干预提供依据。

方法

于2023年11—12月,采用分层随机整群抽样的方法,选取新疆营养改善计划地区重点营养监测县1 071名6~18岁中小学生进行体格检查和生化检测。采用U检验和Kruskal-Wallis H检验比较不同组别中小学生体格指标及维生素D、铁蛋白水平,采用χ2检验比较不同组别中小学生维生素D、铁蛋白缺乏率,用Pearson相关分析中小学生维生素D、铁蛋白营养水平与体格指标的关系。

结果

新疆营养改善重点营养监测县中小学生维生素D水平为14.7(10.7, 19.0)ng/mL,缺乏率为30.8%,不足率为47.8%;铁蛋白水平为57.4(37.7, 83.9)μg/L,缺乏率为5.7%;男生、小学生、乡镇学生血清25(OH)D和铁蛋白水平分别高于女生、初中生及县城学生(U值分别为-11.35,-6.88,-4.52;-3.94,-9.17,-5.23,P值均 < 0.05);女生、初中生及县城学生的维生素D缺乏率分别高于男生、小学生及乡镇学生(χ2值分别为97.52,49.01,21.89,P值均 < 0.05)。初中生铁蛋白缺乏率高于小学生,县城学生高于乡镇学生(χ2值分别为34.11,5.63,P值均 < 0.05)。不同维生素D、铁蛋白营养状况下的中小学生体质量指数、腰围指标间差异有统计学意义(U/H值分别为35.47,22.82;-4.19,-5.36,P值均 < 0.05)。相关性分析显示,维生素D水平和铁蛋白水平与年龄、体质量指数、腰围均呈负相关,与腰围身高比呈正相关(r值分别为-0.31,-0.19,-0.19,0.20;-0.32,-0.13,-0.21,0.08,P值均 < 0.05)。

结论

新疆重点营养监测县中小学生维生素D和铁蛋白水平与年龄、体质量指数、腰围及腰围身高比相关,且存在营养素缺乏问题。建议采取有效措施改善中小学生营养状况,提高学生身体素质。

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乃吉麦·买买提艾力(2000-),女,新疆伊犁人,在读硕士,主要研究方向为学校卫生

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者炜,E-mail:
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Correlation between body mass index and dietary pattern of preschool children in Urumqi[J]. Xinjiang Med, 2024, 54(7): 830-835. 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Comparison of BMI, WC, WHtR, vitamin D and ferritin nutritional among different groups of primary and secondary school students[M(P25, P75)]

, figureFileSmall=null, figureFileBig=null, tableContent=
组别选项人数统计值BMI/(kg·m-2)WC/cmWHtR/%25(OH)D/(ng·mL-1)铁蛋白/(μg·L-1)
性别男53617.0(15.7, 19.2)60.0(56.0, 66.0)41.6(40.1, 43.6)17.0(13.0, 20.7)62.5(41.3, 86.5)
女53517.3(15.5, 19.2)58.5(54.0, 63.0)40.5(39.0, 42.9)12.7(9.0, 16.6)53.2(34.3, 80.0)
U值-0.11-3.85-5.22-11.35-3.94
P值0.91< 0.01< 0.01< 0.01< 0.01
学段小学71716.4(15.2, 18.1)57.0(53.0, 60.0)41.5(39.6, 43.9)15.5(12.1, 19.8)65.0(44.4, 88.7)
初中35418.7(17.2, 20.4)65.3(61.2, 69.0)40.6(39.1, 42.4)12.9(9.0, 17.4)43.2(26.8, 68.1)
U值-12.12-18.68-4.81-6.88-9.17
P值< 0.01< 0.01< 0.01< 0.01< 0.01
学校所在地乡镇36016.6(15.4, 18.3)57.0(52.9, 60.0)41.5(39.6, 44.5)15.5(12.4, 20.2)65.6(44.9, 93.5)
县城71117.6(15.9, 19.7)61.0(56.5, 66.1)40.9(39.2, 42.8)14.3(10.0, 18.4)54.5(34.3, 79.6)
U值-4.90-9.42-2.91-4.52-5.23
P值< 0.01< 0.01< 0.01< 0.01< 0.01
营养状况营养不足11114.0(13.3, 15.1)57.0(52.5, 60.5)39.8(36.9, 42.1)15.9(11.9, 20.6)61.6(39.0, 81.3)
正常82917.1(15.9, 18.8)59.0(55.0, 64.0)41.1(39.4, 42.7)14.4(10.4, 18.7)56.5(37.2, 83.9)
超重8020.9(18.9, 22.6)64.1(58.1, 69.9)43.4(41.3, 48.8)16.0(12.3, 19.7)57.3(35.7, 79.7)
肥胖5123.7(21.1, 26.6)67.5(53.5, 80.0)49.0(40.4, 54.9)15.5(12.7, 19.1)70.9(45.8, 94.9)
H值395.4048.8198.129.934.25
P值< 0.01< 0.01< 0.010.020.24
维生素D缺乏33017.9(16.3, 19.7)61.0(57.0, 65.2)40.4(39.0, 41.9)
水平不足51217.0(15.6, 19.2)59.0(54.3, 65.0)41.5(39.5, 43.8)
充足22916.3(15.0, 18.2)57.5(54.0, 62.5)41.9(40.0, 45.1)
H值35.4722.8245.85
P值< 0.01< 0.01< 0.01
铁蛋白缺乏6118.8(17.3, 20.3)65.4(61.0, 67.0)41.2(39.6, 42.8)
水平充足1 01017.1(15.5, 19.1)58.9(54.5, 64.4)41.2(39.3, 43.3)
U值-4.19-5.36-0.25
P值< 0.01< 0.010.80
合计1 07117.2(15.6, 19.2)59.1(55.0, 65.0)41.2(39.3, 43.2)14.7(10.7, 19.0)57.4(37.7, 83.9)
), ArticleFig(id=1325502240022213273, tenantId=1146029695717560320, journalId=1256213402557890569, articleId=1325502224541037154, language=CN, label=表1, caption=

不同组别中小学生BMI、WC、WHtR、维生素及铁蛋白水平指标比较[M(P25, P75)]

, figureFileSmall=null, figureFileBig=null, tableContent=
组别选项人数统计值BMI/(kg·m-2)WC/cmWHtR/%25(OH)D/(ng·mL-1)铁蛋白/(μg·L-1)
性别男53617.0(15.7, 19.2)60.0(56.0, 66.0)41.6(40.1, 43.6)17.0(13.0, 20.7)62.5(41.3, 86.5)
女53517.3(15.5, 19.2)58.5(54.0, 63.0)40.5(39.0, 42.9)12.7(9.0, 16.6)53.2(34.3, 80.0)
U值-0.11-3.85-5.22-11.35-3.94
P值0.91< 0.01< 0.01< 0.01< 0.01
学段小学71716.4(15.2, 18.1)57.0(53.0, 60.0)41.5(39.6, 43.9)15.5(12.1, 19.8)65.0(44.4, 88.7)
初中35418.7(17.2, 20.4)65.3(61.2, 69.0)40.6(39.1, 42.4)12.9(9.0, 17.4)43.2(26.8, 68.1)
U值-12.12-18.68-4.81-6.88-9.17
P值< 0.01< 0.01< 0.01< 0.01< 0.01
学校所在地乡镇36016.6(15.4, 18.3)57.0(52.9, 60.0)41.5(39.6, 44.5)15.5(12.4, 20.2)65.6(44.9, 93.5)
县城71117.6(15.9, 19.7)61.0(56.5, 66.1)40.9(39.2, 42.8)14.3(10.0, 18.4)54.5(34.3, 79.6)
U值-4.90-9.42-2.91-4.52-5.23
P值< 0.01< 0.01< 0.01< 0.01< 0.01
营养状况营养不足11114.0(13.3, 15.1)57.0(52.5, 60.5)39.8(36.9, 42.1)15.9(11.9, 20.6)61.6(39.0, 81.3)
正常82917.1(15.9, 18.8)59.0(55.0, 64.0)41.1(39.4, 42.7)14.4(10.4, 18.7)56.5(37.2, 83.9)
超重8020.9(18.9, 22.6)64.1(58.1, 69.9)43.4(41.3, 48.8)16.0(12.3, 19.7)57.3(35.7, 79.7)
肥胖5123.7(21.1, 26.6)67.5(53.5, 80.0)49.0(40.4, 54.9)15.5(12.7, 19.1)70.9(45.8, 94.9)
H值395.4048.8198.129.934.25
P值< 0.01< 0.01< 0.010.020.24
维生素D缺乏33017.9(16.3, 19.7)61.0(57.0, 65.2)40.4(39.0, 41.9)
水平不足51217.0(15.6, 19.2)59.0(54.3, 65.0)41.5(39.5, 43.8)
充足22916.3(15.0, 18.2)57.5(54.0, 62.5)41.9(40.0, 45.1)
H值35.4722.8245.85
P值< 0.01< 0.01< 0.01
铁蛋白缺乏6118.8(17.3, 20.3)65.4(61.0, 67.0)41.2(39.6, 42.8)
水平充足1 01017.1(15.5, 19.1)58.9(54.5, 64.4)41.2(39.3, 43.3)
U值-4.19-5.36-0.25
P值< 0.01< 0.010.80
合计1 07117.2(15.6, 19.2)59.1(55.0, 65.0)41.2(39.3, 43.2)14.7(10.7, 19.0)57.4(37.7, 83.9)
), ArticleFig(id=1325502240395506330, tenantId=1146029695717560320, journalId=1256213402557890569, articleId=1325502224541037154, language=EN, label=Tab.2, caption=

Comparison of vitamin D and ferritin nutritional status in primary and secondary school students

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组别选项人数统计值25(OH)D铁蛋白
性别男536100(18.7)22(4.1)
女535230(43.0)39(7.3)
χ2值97.525.06
P值< 0.010.03
学段小学717172(24.0)20(2.8)
初中354158(44.6)41(11.6)
χ2值49.0134.11
P值< 0.01< 0.01
学校所在地乡镇36079(21.9)12(3.3)
县城711251(35.3)49(6.9)
χ2值21.895.63
P值< 0.010.02
营养状态营养不足11129(26.1)2(1.8)
正常829276(33.3)54(6.5)
超重8017(21.3)4(5.0)
肥胖518(15.7)1(2.0)
χ2值15.225.19
P值0.020.14
), ArticleFig(id=1325502240491975323, tenantId=1146029695717560320, journalId=1256213402557890569, articleId=1325502224541037154, language=CN, label=表2, caption=

不同组别中小学生维生素D、铁蛋白缺乏率比较

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组别选项人数统计值25(OH)D铁蛋白
性别男536100(18.7)22(4.1)
女535230(43.0)39(7.3)
χ2值97.525.06
P值< 0.010.03
学段小学717172(24.0)20(2.8)
初中354158(44.6)41(11.6)
χ2值49.0134.11
P值< 0.01< 0.01
学校所在地乡镇36079(21.9)12(3.3)
县城711251(35.3)49(6.9)
χ2值21.895.63
P值< 0.010.02
营养状态营养不足11129(26.1)2(1.8)
正常829276(33.3)54(6.5)
超重8017(21.3)4(5.0)
肥胖518(15.7)1(2.0)
χ2值15.225.19
P值0.020.14
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新疆重点营养监测县中小学生维生素D和铁蛋白营养状况
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乃吉麦·买买提艾力 1 , 丹尼尔·阿不都外力 2 , 邓希希 1 , 艾依热提·买买提 2 , 林勤 2 , 夏荣香 2 , 者炜 *, 2
中国学校卫生 | 学生营养 2025,46(5): 647-650
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中国学校卫生 |学生营养 2025 , 46 (5) : 647 -650
新疆重点营养监测县中小学生维生素D和铁蛋白营养状况
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乃吉麦·买买提艾力1, 丹尼尔·阿不都外力2, 邓希希1, 艾依热提·买买提2, 林勤2, 夏荣香2, 者炜*, 2
作者信息
  • 1新疆医科大学公共卫生学院,乌鲁木齐 830011
  • 2新疆维吾尔自治区疾病预防控制中心健康所
通讯作者:
者炜,E-mail:
作者简介:

乃吉麦·买买提艾力(2000-),女,新疆伊犁人,在读硕士,主要研究方向为学校卫生

Vitamin D and ferritin nutritional status among primary and secondary school students in the key nutrition monitoring counties of Xinjiang
Najimai·Maimaitiaili1, Daniel·Abuduwaili2, Xixi DENG1, Aiyireti·Maimaiti2, Qin LIN2, Rongxiang XIA2, Wei ZHE*, 2
Affiliations
  • 1School of Public Health, Xinjiang Medical University, Urumqi (830011), Xinjiang Uygar Autonomous Region, China
出版时间: 2025-05-25 doi: 10.16835/j.cnki.1000-9817.2025133
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目的

分析新疆重点营养监测县中小学生维生素D、铁蛋白营养状况及与体格指标的关系,为学生营养问题的早期预防和干预提供依据。

方法

于2023年11—12月,采用分层随机整群抽样的方法,选取新疆营养改善计划地区重点营养监测县1 071名6~18岁中小学生进行体格检查和生化检测。采用U检验和Kruskal-Wallis H检验比较不同组别中小学生体格指标及维生素D、铁蛋白水平,采用χ2检验比较不同组别中小学生维生素D、铁蛋白缺乏率,用Pearson相关分析中小学生维生素D、铁蛋白营养水平与体格指标的关系。

结果

新疆营养改善重点营养监测县中小学生维生素D水平为14.7(10.7, 19.0)ng/mL,缺乏率为30.8%,不足率为47.8%;铁蛋白水平为57.4(37.7, 83.9)μg/L,缺乏率为5.7%;男生、小学生、乡镇学生血清25(OH)D和铁蛋白水平分别高于女生、初中生及县城学生(U值分别为-11.35,-6.88,-4.52;-3.94,-9.17,-5.23,P值均 < 0.05);女生、初中生及县城学生的维生素D缺乏率分别高于男生、小学生及乡镇学生(χ2值分别为97.52,49.01,21.89,P值均 < 0.05)。初中生铁蛋白缺乏率高于小学生,县城学生高于乡镇学生(χ2值分别为34.11,5.63,P值均 < 0.05)。不同维生素D、铁蛋白营养状况下的中小学生体质量指数、腰围指标间差异有统计学意义(U/H值分别为35.47,22.82;-4.19,-5.36,P值均 < 0.05)。相关性分析显示,维生素D水平和铁蛋白水平与年龄、体质量指数、腰围均呈负相关,与腰围身高比呈正相关(r值分别为-0.31,-0.19,-0.19,0.20;-0.32,-0.13,-0.21,0.08,P值均 < 0.05)。

结论

新疆重点营养监测县中小学生维生素D和铁蛋白水平与年龄、体质量指数、腰围及腰围身高比相关,且存在营养素缺乏问题。建议采取有效措施改善中小学生营养状况,提高学生身体素质。

维生素D  /  铁蛋白质类  /  营养状况  /  学生
Objective

To analyze the relationship between vitamin D and ferritin nutritional status with physical indicators in primary and secondary school students in the key nutrition monitoring counties of Xinjiang, so as to provide reference for early prevention and intervention of students' nutrition issues.

Methods

From November to December 2023, 1 071 students aged 6-18 from key nutrition monitoring counties in the Xinjiang Nutrition Improvement Plan area were selected via stratified random sampling for physical and biochemical tests. The U test and Kruskal-Wallis H test were used to compare the differences in physical indicators and the distribution of vitamin D and ferritin levels. Chi-square test was used to compare the prevalence of vitamin D and ferritin deficiencies among different groups of primary and secondary school students. Pearson correlation was used to analyze the relationship between the nutritional levels of vitamin D and ferritin and physical indicators.

Results

The median vitamin D level was 14.7 (10.7, 19.0)ng/mL, with deficiency and insufficiency rates of 30.8% and 37.4% among primary and secondary school students in the key nutrition monitoring counties of Xinjiang Nutrition Improvement Plan area. Ferritin levels were 57.4 (37.7, 83.9)μg/L, with a deficiency rate of 5.7%. Males, primary school students, and rural residents had higher vitamin D and ferritin levels than females, secondary school students, and urban residents (U=-11.35, -6.88, -4.52; -3.94, -9.17, -5.23, P < 0.05). Vitamin D deficiency was more prevalent in females, secondary school students, and urban students (χ2=97.52, 49.01, 21.89, P < 0.05), while ferritin deficiency was higher in primary school students and urban areas (χ2=34.11, 5.63, P < 0.05). Significant differences in body mass index (BMI) and waist circumstance (WC) were observed across vitamin D/ferritin statuses (U/H=35.47, 22.82; -4.19, -5.36, P < 0.05). Vitamin D and ferritin levels negatively correlated with age, BMI, and WC but positively with waist-to-height ratio (WHtR) (r=-0.31, -0.19, -0.19, 0.20; -0.32, -0.13, -0.21, 0.08, P < 0.05).

Conclusions

Vitamin D and ferritin levels in primary and secondary school students in key nutritional monitoring counties in Xinjiang are correlated with age, BMI, WC and WHtR, and there are nutrient deficiencies. Targeted measures are recommended to improve nutritional status and physical health.

Vitamin D  /  Ferritins  /  Nutritional status  /  Students
乃吉麦·买买提艾力, 丹尼尔·阿不都外力, 邓希希, 艾依热提·买买提, 林勤, 夏荣香, 者炜. 新疆重点营养监测县中小学生维生素D和铁蛋白营养状况. 中国学校卫生, 2025 , 46 (5) : 647 -650 . DOI: 10.16835/j.cnki.1000-9817.2025133
Najimai·Maimaitiaili, Daniel·Abuduwaili, Xixi DENG, Aiyireti·Maimaiti, Qin LIN, Rongxiang XIA, Wei ZHE. Vitamin D and ferritin nutritional status among primary and secondary school students in the key nutrition monitoring counties of Xinjiang[J]. Chinese Journal of School Health, 2025 , 46 (5) : 647 -650 . DOI: 10.16835/j.cnki.1000-9817.2025133
维生素D具有调节钙磷代谢和骨骼健康的作用[1]。铁是人体内含量最多的一种必需微量元素,严重铁缺乏将导致缺铁性贫血[2]。中小学生营养状况一直受到重视,中小学生的超重肥胖问题已经成为全球重要的公共卫生问题之一[2-3]。研究显示,截止到2022年,全球将有超过10亿人患有肥胖症;自1990年以来,全球成人肥胖率增加了1倍多,儿童和青少年(5~19岁)肥胖率增加了4倍[4]。常用的体格评价指标有体质量指数(body mass index, BMI)、腰围(waist circumstance, WC)、腰围身高比(waist-to-height ratio, WHtR)等,不同体格评价指标的筛查能力不同[5]。本研究利用2023年“农村义务教育学生营养改善计划营养健康状况监测评估”中新疆部分重点营养监测县营养监测数据,探索该地区中小学生维生素D、铁蛋白水平及与体格指标之间的关系,评价学生营养改善计划的实施效果,分析存在的营养健康问题,为政府部门制定学生营养与健康相关政策提供科学依据。
在新疆部分重点营养监测县(阿合奇县、策勒县、麦盖提县)收集2023年11—12月实施学生营养改善计划后的监测数据,采用分层随机整群抽样的方法,选择县城和农村、小学和初中各1所学校;从小学一年级到初中三年级,每个年级简单随机抽取约20人,男、女生各半,每县360人,剔除存在逻辑错误及数据不完整的问卷,共发放1 080份问卷,最终纳入1 071份数据。其中男生536名,女生535名;小学生717名,初中生354名;学校所在地在为乡镇的360名,县城的711名。本研究已获得中国疾病预防控制中心营养与健康所伦理委员会审批(批准号:2021-018),调查前获得调查对象及其家长的知情同意。
采用标准化设备,按照《学生健康检查技术规范》(GB/T 26343—2010)[6]对学生体格指标进行测定,由经过统一培训的调查人员测量,体格检查要求在清晨空腹状态下进行。记录的身高和腰围以cm为单位,体重以kg为单位。
采集儿童空腹静脉血5 mL,离心取血清,检测血清25(OH)D、铁蛋白的质量体积浓度。血清25(OH)D的检测采用高效液相色谱法-串联质谱法,铁蛋白检测采用电化学发光法,指标由省级或县级疾病预防控制中心委托单位统一测定。
BMI=体重(kg)/[身高(m)]2。BMI划分标准按照《学龄儿童青少年超重与肥胖筛查》[7]和《学龄儿童青少年营养不良筛查》[8]筛查学生超重、肥胖和营养不足(包括生长迟缓和消瘦)。WHtR=WC/身高×100%。
参照《人群维生素D缺乏筛查方法》[9]进行判定。血清25(OH)D质量体积浓度 < 12 ng/mL为维生素D缺乏,12~ < 20 ng/mL为维生素D不足,≥20 ng/mL为维生素D充足。
采用世界卫生组织标准[10]进行判定。6岁以上儿童铁蛋白是否缺乏判定标准为铁蛋白质量体积浓度 < 15 μg/L为铁蛋白缺乏,≥15 μg/L为铁蛋白充足。
数据来自“农村义务教育学生营养改善监测系统平台”,运用SPSS 25.0软件进行分析处理。本研究对学生体格和生化指标数据进行Kolmogorov-Smirnov正态性检验,发现以上资料均为非正态分布。定量资料用[M(P25, P75)]进行描述,组间比较采用U检验和Kruskal-Wallis H检验;定性资料用频数和百分比表示,组间比较采用χ2检验;相关性分析采用Pearson相关分析。检验水准α=0.05。
不同学段、学校所在地、营养状况、维生素D、铁蛋白分组的中小学生的BMI差异均有统计学意义(P值均 < 0.01)。不同性别、学段、学校所在地和营养状况、维生素D分组的中小学生WC、WHtR差异均有统计学意义(P值均 < 0.01),男生WC、WHtR均高于女生,小学生的WHtR高于初中生,乡镇学生WHtR高于县城学生。维生素D缺乏和不足及血清铁蛋白缺乏的中小学生BMI、WC值高于充足水平的学生,WHtR低于充足水平的学生。见表1。
中小学生血清25(OH)D水平为14.7(10.7, 19.0)ng/mL,铁蛋白水平为57.4(37.7, 83.9)μg/L;不同性别、学段、学校所在地中小学生的血清25(OH)D和血清铁蛋白水平差异均有统计学意义(P值均 < 0.01)。不同营养状况中小学生的血清25(OH)D水平差异有统计学意义(P < 0.05),超重儿童的血清25(OH)D水平高于营养不足、正常、肥胖学生。见表1。
中小学生维生素D缺乏率为30.8%(330/1 071),不足率为47.8%(512/1 071);不同性别、学段、学校所在地、营养状况下中小学生血清25(OH)D缺乏率差异均有统计学意义(P值均 < 0.01)。中小学生铁蛋白缺乏率为5.7%(61/1 071),不同学段和学校所在地中小学生铁蛋白缺乏率差异均有统计学意义(P值均 < 0.05)。见表2。
Pearson相关分析结果显示,维生素D水平与年龄、BMI、WC均呈负相关(r值分别为-0.31,-0.19,-0.19),与WHtR呈正相关(r=0.20)(P值均 < 0.01)。铁蛋白水平与年龄、BMI、WC均呈负相关(r值分别为-0.32,-0.13,-0.21),与WHtR呈正相关(r=0.08)(P值均 < 0.05)。
本研究显示,中小学生维生素D水平为14.7(10.7,19.0)ng/mL,缺乏率为30.8%,不足率为47.8%;与以往新疆部分重点营养监测地区中小学生的研究结果一致[11],男生血清25(OH)D高于女生,与其他研究一致[12]。可能是由于:(1)男生的户外运动时间较女生长,进而增加了通过皮肤合成的维生素D[13];(2)相比男生,女生会用防晒用品进行紫外线的防护,影响维生素D的合成,并且有研究提到防晒指数的提高对中小学生维生素D吸收影响可能越大[14]。本研究中,小学生血清25(OH)D和铁蛋白水平高于初中生,可能是由于随着学段的提高,学生学业任务加重,且随着电子产品的使用,中小学生户外活动时间缩短,影响维生素D的合成[15]。乡镇学生的血清25(OH)D和铁蛋白水平高于县城学生。考虑与农村中小学生相比县城学生户外活动多、皮肤暴露更多有关[16]。
新疆部分重点营养监测地区中小学生铁蛋白水平为57.4(37.7,83.9)μg/L,缺乏率为5.7%;与以往研究相比,铁蛋白平均水平较低,缺乏率较高[17]。中小学生正处于体格发育的关键时期,对铁蛋白的需求量大[18],若不及时补充,可能会出现缺铁性贫血,影响学生学习、生活和生长发育。有研究发现,维生素D水平也会影响铁蛋白水平,进而导致贫血[19]。
相关性分析发现,中小学生维生素D水平和铁蛋白水平与年龄、BMI、WC均呈负相关,而与WHtR呈正相关。以往研究指出,年龄和BMI是影响维生素D水平的重要因素之一[20]。有研究认为,中小学生随着BMI的升高,越来越多的脂溶性维生素D会存储在脂肪细胞中,进而导致血液循环中的维生素D减少[11]。青春期学生不良饮食行为的出现会影响铁蛋白水平,容易导致学生贫血[21]。营养素养是影响中小学生饮食行为的积极因素[22],还能改变饮食质量,提高健康水平[23],建议有关部门加强学校和家庭的健康教育,营造健康饮食环境。
在农村义务教育学生营养改善计划项目的实施下,学生的营养状况得到明显改善[24]。但仍存在营养素缺乏问题,新疆地理位置复杂,多民族共同居住,饮食习惯和生活方式各有不同,营养状况存在差异也是其中表现之一。建议相关部门结合各民族饮食习惯,建立合理的膳食模式[25],提高中小学生的身体素质。
本研究存在以下局限性:首先,样本来自农村和县城学校,结果外推到城市中小学生存在一定的局限性;其次,因研究数据来源于横断面研究,不能进行因果推断,故需要进一步深入探讨并结合前瞻性研究进行推断;最后,本研究样本量有限,未来考虑应扩大样本量,增强研究代表性。
  • “天山英才”医药卫生高层次人才项目(TSYC202401B095)
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doi: 10.16835/j.cnki.1000-9817.2025133
  • 接收时间:2025-02-04
  • 首发时间:2026-11-06
  • 出版时间:2025-05-25
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  • 收稿日期:2025-02-04
  • 修回日期:2025-03-13
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“天山英才”医药卫生高层次人才项目(TSYC202401B095)
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    1新疆医科大学公共卫生学院,乌鲁木齐 830011
    2新疆维吾尔自治区疾病预防控制中心健康所

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