Article(id=1325500893558342234, tenantId=1146029695717560320, journalId=1256213402557890569, issueId=1325500677975318675, articleNumber=null, orderNo=null, doi=10.16835/j.cnki.1000-9817.2025060, pmid=null, cstr=null, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=null, receivedDate=1731254400000, receivedDateStr=2024-11-11, revisedDate=1734278400000, revisedDateStr=2024-12-16, acceptedDate=null, acceptedDateStr=null, onlineDate=1793953639640, onlineDateStr=2026-11-06, pubDate=1740412800000, pubDateStr=2025-02-25, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1793953639640, onlineIssueDateStr=2026-11-06, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1793953639640, creator=13701087609, updateTime=1793953639640, updator=13701087609, issue=Issue{id=1325500677975318675, tenantId=1146029695717560320, journalId=1256213402557890569, year='2025', volume='46', issue='2', pageStart='153', pageEnd='304', issueExtLink='null', onlineDate='null', pubDate='1740412800000', pubDateStr='2025-02-25', beforeIssueId=null, nextIssueId=null, price=null, status=1, issueComplete=1, articleOrder=1, issueType=-1, specialIssue=null, createTime=1793953588241, creator='13701087609', updateTime=1793953588241, updator='13701087609', preIssue=null, nextIssue=null, articleTotal=null, ext=null, issueFiles=null, downloadFileDto=null}, startPage=200, endPage=204, ext={EN=ArticleExt(id=1325500894866965083, articleId=1325500893558342234, tenantId=1146029695717560320, journalId=1256213402557890569, language=EN, title=Prospective study of association between dietary macronutrients and lung function in school-aged children, columnId=1259565862625862592, journalTitle=Chinese Journal of School Health, columnName=Student Nutrition, runingTitle=null, highlight=null, articleAbstract=
Objective

To explore the longitudinal associations between dietary macronutrients and lung function in school-aged children, so as to provide the nutritional research evidence for promoting children's lung health.

Methods

In November 2021, two primary schools located in Chengdu, Sichuan Province were selected from the Southwest China Childhood Nutrition and Growth (SCCNG) cohort by a stratified cluster random sampling method, enrolling a total of 1 112 school-aged children aged 8 to 13 years. At baseline, the dietary and sociodemographic characteristics of the children were assessed. One year later, the forced vital capacity (FVC) of the children was measured and converted into Z-scores (FVC-Z), while the vital capacity index (VCI) was also calculated. Generalized linear regression analysis was employed to examine the associations between dietary macronutrients and lung function, considering interactions with gender and age, followed by stratified analysis.

Results

After adjusting for confounding factors, the analysis results of the generalized linear regression model showed that the carbohydrate energy ratio was negatively correlated with FVC-Z (β=-0.02) and VCI (β=-0.16), while the fat energy ratio showed a positive correlation with FVC-Z (β=0.03) and VCI (β=0.23) (P < 0.05). The protein energy ratio was positively correlated with FVC-Z (β=0.09) and VCI (β=0.60) specifically in girls (P < 0.05). Additionally, there was an interaction effect of age on the associations between macronutrients and lung function (P < 0.01); in children aged 8-9 and 10-11, the carbohydrate energy supply ratio was negatively correlated with FVC-Z (β=-0.04, -0.03) and VCI (β=-0.29, -0.21), and fat energy supply ratio was positively correlated with FVC-Z (β=0.07, 0.05) and VCI (β=0.46, 0.32) (P < 0.05).

Conclusions

There are age and sex differences in the association of dietary macronutrients with lung function, with a low-carbohydrate, high-fat diet promoting lung function in children. Additionally, protein intake appears to have a positive influence on the lung function of girls. The early school-age period may represent a critical window for dietary interventions aimed at promoting lung health.

, authors=Lu LI1, Mengxue CHEN2, Ruirui LI1, Xueting LIU1, Xiaoyu WANG2, Yujie XU2, Jingyuan XIONG1, Guo CHENG*, 2, 3, authorsList=Lu LI, Mengxue CHEN, Ruirui LI, Xueting LIU, Xiaoyu WANG, Yujie XU, Jingyuan XIONG, Guo CHENG, authorCompany=null, correspAuthors=Guo CHENG, 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=1325500898218213981, articleId=1325500893558342234, tenantId=1146029695717560320, journalId=1256213402557890569, language=CN, title=膳食宏量营养素与学龄儿童肺功能关联的前瞻性研究, columnId=1259565866560119750, journalTitle=中国学校卫生, columnName=学生营养, runingTitle=null, highlight=null, articleAbstract=
目的

探究学龄儿童膳食宏量营养素与肺功能的纵向关联,为促进儿童肺健康提供营养研究证据。

方法

2021年11月,采用分层整群随机抽样方法从中国西南儿童营养与生长(SCCNG)队列中选取2所位于四川省成都市的小学,共纳入1 112名8~13岁学龄儿童,基线时调查儿童的膳食、社会人口学特征等,随访1年后测量儿童的用力肺活量(FVC)并将其转换为Z评分(FVC-Z),同时计算肺活量指数(VCI); 采用广义线性回归分析膳食宏量营养素与肺功能的关联,及其与性别和年龄的交互作用,并进行分层分析。

结果

广义线性回归模型分析结果显示,调整混杂因素后,碳水化合物供能比与学龄儿童FVC-Z(β=-0.02)和VCI(β=-0.16)均呈负相关,脂肪供能比与FVC-Z(β=0.03)和VCI(β=0.23)均呈正相关(P值均 < 0.05); 蛋白质供能比仅在女童中与FVC-Z(β=0.09)和VCI(β=0.60)呈正相关(P值均 < 0.05); 年龄对宏量营养素和肺功能关联有交互作用(P交互值均 < 0.01),在8~9和10~11岁儿童中,碳水化合物供能比与FVC-Z(β值分别为-0.04,-0.03)和VCI(β值分别为-0.29,-0.21)均呈负相关,脂肪供能比与FVC-Z(β值分别为0.07,0.05)和VCI(β值分别为0.46,0.32)均呈正相关(P值均 < 0.05)。

结论

膳食宏量营养素与儿童肺功能的关联存在年龄和性别差异。低碳水高脂肪的膳食对儿童肺功能有促进作用,蛋白质对女童肺功能有促进作用,学龄儿童早期可能是膳食干预肺功能的窗口期。

, authors=李露1, 陈梦雪2, 李蕊瑞1, 刘雪婷1, 汪晓语2, 徐裕杰2, 熊静远1, 成果*, 2, 3, authorsList=李露, 陈梦雪, 李蕊瑞, 刘雪婷, 汪晓语, 徐裕杰, 熊静远, 成果, authorCompany=null, correspAuthors=成果, authorNote=

李露(1999-),女,陕西安康人,在读硕士,主要研究方向为营养与健康

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成果,E-mail:
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Testosterone-to-estradiol ratio and lung function in a prospective study of Puerto Rican youth[J]. 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Generalized linear regression analysis of association between macronutrient energy ratios and lung [JZ] function in school-aged children[β(95%CI), n=1 112]

, figureFileSmall=null, figureFileBig=null, tableContent=
宏量营养素供能比FVC-ZVCI
模型1模型2模型1模型2
碳水化合物-0.03(-0.05~-0.01)**-0.02(-0.04~-0.01)**-0.21(-0.38~-0.05)*-0.16(-0.28~-0.03)*
蛋白质0.03(-0.03~0.08)0.04(-0.01~0.09)0.11(-0.35~0.58)0.25(-0.10~0.60)
脂肪0.05(0.02~0.08)**0.03(0.01~0.06)**0.38(0.15~0.60)**0.23(0.06~0.40)**
), ArticleFig(id=1325500907089167001, tenantId=1146029695717560320, journalId=1256213402557890569, articleId=1325500893558342234, language=CN, label=表1, caption=

宏量营养素供能比与学龄儿童肺功能关联的广义线性回归分析[β值(95%CI),n=1 112]

, figureFileSmall=null, figureFileBig=null, tableContent=
宏量营养素供能比FVC-ZVCI
模型1模型2模型1模型2
碳水化合物-0.03(-0.05~-0.01)**-0.02(-0.04~-0.01)**-0.21(-0.38~-0.05)*-0.16(-0.28~-0.03)*
蛋白质0.03(-0.03~0.08)0.04(-0.01~0.09)0.11(-0.35~0.58)0.25(-0.10~0.60)
脂肪0.05(0.02~0.08)**0.03(0.01~0.06)**0.38(0.15~0.60)**0.23(0.06~0.40)**
), ArticleFig(id=1325500907194024602, tenantId=1146029695717560320, journalId=1256213402557890569, articleId=1325500893558342234, language=EN, label=Tab.2, caption=

Generalized linear regression analysis of association between macronutrient energy ratios and lung function in children of different genders[β(95%CI)]

, figureFileSmall=null, figureFileBig=null, tableContent=
因变量自变量男童(n=541)女童(n=571)P交互值
模型1模型2模型1模型2
FVC-Z碳水化合物-0.02(-0.05~0.01)-0.01(-0.04~0.01)-0.04(-0.07~-0.01)**-0.04(-0.06~-0.01)**0.19
蛋白质-0.01(-0.08~0.08)-0.01(-0.08~0.06)0.06(-0.02~0.14)0.09(0.02~0.16)*0.06
脂肪0.04(0.01~0.08)*0.03(-0.01~0.06)0.06(0.02~0.09)**0.04(0.01~0.08)*0.47
VCI碳水化合物-0.16(-0.40~0.08)-0.09(-0.27~0.10)-0.29(-0.51~-0.06)*-0.23(-0.40~-0.06)**0.28
蛋白质-0.08(-0.74~0.58)-0.06(-0.57~0.45)0.40(-0.24~1.04)0.60(0.12~1.08)*0.07
脂肪0.35(0.03~0.67)*0.19(-0.06~0.44)0.42(0.11~0.73)**0.28(0.05~0.51)*0.67
), ArticleFig(id=1325500907269522075, tenantId=1146029695717560320, journalId=1256213402557890569, articleId=1325500893558342234, language=CN, label=表2, caption=

不同性别儿童宏量营养素供能比与肺功能关联的广义线性回归分析[β值(95%CI)]

, figureFileSmall=null, figureFileBig=null, tableContent=
因变量自变量男童(n=541)女童(n=571)P交互值
模型1模型2模型1模型2
FVC-Z碳水化合物-0.02(-0.05~0.01)-0.01(-0.04~0.01)-0.04(-0.07~-0.01)**-0.04(-0.06~-0.01)**0.19
蛋白质-0.01(-0.08~0.08)-0.01(-0.08~0.06)0.06(-0.02~0.14)0.09(0.02~0.16)*0.06
脂肪0.04(0.01~0.08)*0.03(-0.01~0.06)0.06(0.02~0.09)**0.04(0.01~0.08)*0.47
VCI碳水化合物-0.16(-0.40~0.08)-0.09(-0.27~0.10)-0.29(-0.51~-0.06)*-0.23(-0.40~-0.06)**0.28
蛋白质-0.08(-0.74~0.58)-0.06(-0.57~0.45)0.40(-0.24~1.04)0.60(0.12~1.08)*0.07
脂肪0.35(0.03~0.67)*0.19(-0.06~0.44)0.42(0.11~0.73)**0.28(0.05~0.51)*0.67
), ArticleFig(id=1325500907370185372, tenantId=1146029695717560320, journalId=1256213402557890569, articleId=1325500893558342234, language=EN, label=Tab.3, caption=

Generalized linear regression analysis of association between macronutrient energy ratios and lung function in children of different ages[β(95%CI)]

, figureFileSmall=null, figureFileBig=null, tableContent=
因变量自变量8~9岁(n=191)10~11岁(n=541)12~13岁(n=380)P交互值
模型1模型2模型1模型2模型1模型2
FVC-Z碳水化合物-0.06(-0.10~-0.01)**-0.04(-0.08~-0.01)*-0.03(-0.06~-0.01)*-0.03(-0.06~-0.01)**0.02(-0.02~0.06)0.02(-0.01~0.05)< 0.01
蛋白质0.10(-0.02~0.22)0.05(-0.06~0.17)0.04(-0.04~0.12)0.06(-0.01~0.13)-0.09(-0.19~0.01)-0.05(-0.14~0.03)< 0.01
脂肪0.09(0.03~0.14)**0.07(0.01~0.12)*0.06(0.02~0.09)**0.05(0.02~0.08)**-0.02(-0.08~0.03)-0.03(-0.08~0.01)< 0.01
VCI碳水化合物-0.49(-0.88~-0.09)*-0.29(-0.58~-0.00)*-0.22(-0.45~0.01)-0.21(-0.38~-0.04)*0.16(-0.15~0.46)0.14(-0.10~0.38)< 0.01
蛋白质0.83(-0.30~1.96)0.40(-0.42~1.22)0.08(-0.57~0.73)0.35(-0.12~0.82)-0.64(-1.46~0.17)-0.39(-1.03~0.26)< 0.01
脂肪0.75(0.22~1.27)**0.46(0.08~0.84)*0.41(0.10~0.72)**0.32(0.10~0.55)**-0.19(-0.60~0.23)-0.22(-0.54~0.11)< 0.01
), ArticleFig(id=1325500907454071453, tenantId=1146029695717560320, journalId=1256213402557890569, articleId=1325500893558342234, language=CN, label=表3, caption=

不同年龄组儿童宏量营养素供能比与肺功能的广义线性回归分析[β值(95%CI)]

, figureFileSmall=null, figureFileBig=null, tableContent=
因变量自变量8~9岁(n=191)10~11岁(n=541)12~13岁(n=380)P交互值
模型1模型2模型1模型2模型1模型2
FVC-Z碳水化合物-0.06(-0.10~-0.01)**-0.04(-0.08~-0.01)*-0.03(-0.06~-0.01)*-0.03(-0.06~-0.01)**0.02(-0.02~0.06)0.02(-0.01~0.05)< 0.01
蛋白质0.10(-0.02~0.22)0.05(-0.06~0.17)0.04(-0.04~0.12)0.06(-0.01~0.13)-0.09(-0.19~0.01)-0.05(-0.14~0.03)< 0.01
脂肪0.09(0.03~0.14)**0.07(0.01~0.12)*0.06(0.02~0.09)**0.05(0.02~0.08)**-0.02(-0.08~0.03)-0.03(-0.08~0.01)< 0.01
VCI碳水化合物-0.49(-0.88~-0.09)*-0.29(-0.58~-0.00)*-0.22(-0.45~0.01)-0.21(-0.38~-0.04)*0.16(-0.15~0.46)0.14(-0.10~0.38)< 0.01
蛋白质0.83(-0.30~1.96)0.40(-0.42~1.22)0.08(-0.57~0.73)0.35(-0.12~0.82)-0.64(-1.46~0.17)-0.39(-1.03~0.26)< 0.01
脂肪0.75(0.22~1.27)**0.46(0.08~0.84)*0.41(0.10~0.72)**0.32(0.10~0.55)**-0.19(-0.60~0.23)-0.22(-0.54~0.11)< 0.01
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膳食宏量营养素与学龄儿童肺功能关联的前瞻性研究
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李露 1 , 陈梦雪 2 , 李蕊瑞 1 , 刘雪婷 1 , 汪晓语 2 , 徐裕杰 2 , 熊静远 1 , 成果 *, 2, 3
中国学校卫生 | 学生营养 2025,46(2): 200-204
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中国学校卫生 |学生营养 2025 , 46 (2) : 200 -204
膳食宏量营养素与学龄儿童肺功能关联的前瞻性研究
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李露1, 陈梦雪2, 李蕊瑞1, 刘雪婷1, 汪晓语2, 徐裕杰2, 熊静远1, 成果*, 2, 3
作者信息
  • 1四川大学华西公共卫生学院/华西第四医院,成都 610041
  • 2四川大学华西第二医院妇儿营养中心
  • 3四川大学华西护理学院
通讯作者:
成果,E-mail:
作者简介:

李露(1999-),女,陕西安康人,在读硕士,主要研究方向为营养与健康

Prospective study of association between dietary macronutrients and lung function in school-aged children
Lu LI1, Mengxue CHEN2, Ruirui LI1, Xueting LIU1, Xiaoyu WANG2, Yujie XU2, Jingyuan XIONG1, Guo CHENG*, 2, 3
Affiliations
  • 1West China School of Public Health/West China Fourth Hospital, Sichuan University, Chengdu (610041), Sichuan Province, China
出版时间: 2025-02-25 doi: 10.16835/j.cnki.1000-9817.2025060
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目的

探究学龄儿童膳食宏量营养素与肺功能的纵向关联,为促进儿童肺健康提供营养研究证据。

方法

2021年11月,采用分层整群随机抽样方法从中国西南儿童营养与生长(SCCNG)队列中选取2所位于四川省成都市的小学,共纳入1 112名8~13岁学龄儿童,基线时调查儿童的膳食、社会人口学特征等,随访1年后测量儿童的用力肺活量(FVC)并将其转换为Z评分(FVC-Z),同时计算肺活量指数(VCI); 采用广义线性回归分析膳食宏量营养素与肺功能的关联,及其与性别和年龄的交互作用,并进行分层分析。

结果

广义线性回归模型分析结果显示,调整混杂因素后,碳水化合物供能比与学龄儿童FVC-Z(β=-0.02)和VCI(β=-0.16)均呈负相关,脂肪供能比与FVC-Z(β=0.03)和VCI(β=0.23)均呈正相关(P值均 < 0.05); 蛋白质供能比仅在女童中与FVC-Z(β=0.09)和VCI(β=0.60)呈正相关(P值均 < 0.05); 年龄对宏量营养素和肺功能关联有交互作用(P交互值均 < 0.01),在8~9和10~11岁儿童中,碳水化合物供能比与FVC-Z(β值分别为-0.04,-0.03)和VCI(β值分别为-0.29,-0.21)均呈负相关,脂肪供能比与FVC-Z(β值分别为0.07,0.05)和VCI(β值分别为0.46,0.32)均呈正相关(P值均 < 0.05)。

结论

膳食宏量营养素与儿童肺功能的关联存在年龄和性别差异。低碳水高脂肪的膳食对儿童肺功能有促进作用,蛋白质对女童肺功能有促进作用,学龄儿童早期可能是膳食干预肺功能的窗口期。

营养状况  /  膳食调查  /  肺  /  回归分析  /  儿童
Objective

To explore the longitudinal associations between dietary macronutrients and lung function in school-aged children, so as to provide the nutritional research evidence for promoting children's lung health.

Methods

In November 2021, two primary schools located in Chengdu, Sichuan Province were selected from the Southwest China Childhood Nutrition and Growth (SCCNG) cohort by a stratified cluster random sampling method, enrolling a total of 1 112 school-aged children aged 8 to 13 years. At baseline, the dietary and sociodemographic characteristics of the children were assessed. One year later, the forced vital capacity (FVC) of the children was measured and converted into Z-scores (FVC-Z), while the vital capacity index (VCI) was also calculated. Generalized linear regression analysis was employed to examine the associations between dietary macronutrients and lung function, considering interactions with gender and age, followed by stratified analysis.

Results

After adjusting for confounding factors, the analysis results of the generalized linear regression model showed that the carbohydrate energy ratio was negatively correlated with FVC-Z (β=-0.02) and VCI (β=-0.16), while the fat energy ratio showed a positive correlation with FVC-Z (β=0.03) and VCI (β=0.23) (P < 0.05). The protein energy ratio was positively correlated with FVC-Z (β=0.09) and VCI (β=0.60) specifically in girls (P < 0.05). Additionally, there was an interaction effect of age on the associations between macronutrients and lung function (P < 0.01); in children aged 8-9 and 10-11, the carbohydrate energy supply ratio was negatively correlated with FVC-Z (β=-0.04, -0.03) and VCI (β=-0.29, -0.21), and fat energy supply ratio was positively correlated with FVC-Z (β=0.07, 0.05) and VCI (β=0.46, 0.32) (P < 0.05).

Conclusions

There are age and sex differences in the association of dietary macronutrients with lung function, with a low-carbohydrate, high-fat diet promoting lung function in children. Additionally, protein intake appears to have a positive influence on the lung function of girls. The early school-age period may represent a critical window for dietary interventions aimed at promoting lung health.

Nutritional status  /  Diet surveys  /  Lung  /  Regression analysis  /  Child
李露, 陈梦雪, 李蕊瑞, 刘雪婷, 汪晓语, 徐裕杰, 熊静远, 成果. 膳食宏量营养素与学龄儿童肺功能关联的前瞻性研究. 中国学校卫生, 2025 , 46 (2) : 200 -204 . DOI: 10.16835/j.cnki.1000-9817.2025060
Lu LI, Mengxue CHEN, Ruirui LI, Xueting LIU, Xiaoyu WANG, Yujie XU, Jingyuan XIONG, Guo CHENG. Prospective study of association between dietary macronutrients and lung function in school-aged children[J]. Chinese Journal of School Health, 2025 , 46 (2) : 200 -204 . DOI: 10.16835/j.cnki.1000-9817.2025060
肺功能发育受多个宿主和环境因素影响,在人群中呈现出不同的发育模式,即存在一系列肺功能轨迹[1]。越来越多的证据表明,低于平均轨迹的肺功能与不良健康结局密切相关,不仅易导致哮喘、肺炎、慢阻肺等呼吸系统相关疾病,还可造成心血管、代谢和神经心理多器官系统的健康损害[2-3]。研究表明肺功能轨迹大多建立于儿童早期[4],儿童早期作为肺发育可能的窗口期会发生追赶生长和生长迟缓[5],因此关注儿童早期发育将有助于实现一生中最大化肺功能并预防相关不良健康结局的危害。研究表明,维生素、膳食纤维、奶制品等膳食因素与儿童肺部健康关系密切[6-8]。本研究利用中国西南儿童营养与生长(Southwest China Childhood Nutrition and Growth, SCCNG)前瞻性研究数据,探讨三大宏量营养素与学龄儿童肺功能的关联及其年龄和性别差异,为促进儿童肺健康提供理论依据。
采用分层整群随机抽样方法从SCCNG队列[9]中选取2所位于四川省成都市的小学,在每所学校的二至五年级中以年级分层,采用随机数字表法抽取3~4个班级,每个班级作为整体纳入研究,共抽取30个班级1 196名儿童。2021年11月,调查人员通过问卷收集研究对象的社会人口学资料、膳食摄入、体力活动和久坐行为等信息。1年后进行随访,测量儿童的身高、体重、用力肺活量(forced vital capacity, FVC)等身体指标。过程中35名儿童因转学或健康相关原因被排除,49名儿童因膳食或其他信息数据缺失超过50%被排除[10],最终1 112名儿童被纳入分析。其中女童571名,男童541名; 年龄8~13岁。研究获得四川大学华西公共卫生学院(华西第四医院)伦理委员会批准,调查对象监护人均同意并签订知情同意书。
由经过统一培训的调查人员使用经过验证并具有一定地域(云南、贵州、四川)特色的半定量食物频率问卷(Food Frequency Questionnaire, FFQ)[11]实施膳食调查。参与者被要求回忆过去1年每种食物(米饭、面条、玉米、豆制品、肉等约40项)的消费频率:每天、每周、每月、每年或从不; 估计每次的摄入量。为了提高估计份量的准确性,研究提供了标准餐具,包括碗、盘子和玻璃杯。总能量的摄入量和宏量营养素摄入量根据《中国食物成分表》[12]进行评估,具体是将每种食物的每日平均摄入量与其对应的宏量营养素或能量相乘,再将所有食物的每日宏量营养素或能量摄入量相加得到研究对象的每日宏量营养素或能量摄入量。
FVC和肺活量指数(vital capacity index, VCI)是儿童使用最普遍的肺功能测量指标,可以较好地体现儿童肺发育状况[13]。采用电子肺活量计(型号:EMOVC-101AII)测量学生的FVC,并计算VCI=FVC(mL)/体重(kg)。根据全球肺功能倡议(global lung function initiative, GLI)曲线,将FVC转换为FVC-Z评分,并调整性别、年龄、身高和地区等因素[14],采用GLI R宏进行计算(可从https://github.com/thlytras/rspiro获取)[6]。
由培训合格的调查人员采用统一的方法和校准的仪器测量儿童的身高、体重。受检者穿轻便衣裤、赤脚、自然站立,保持身体平稳。身高精确到0.1 cm,体重精确到0.1 kg。体质量指数(body mass index, BMI)=体重(kg)/[身高(m)]2。根据Cole[15]提出的公式将BMI转换为Z评分,该公式的计算基于中国儿童青少年的参考人群标准[16]。
性别、出生日期、母亲文化水平、家庭月收入、是否暴露于吸烟环境根据基线时自我报告的问卷获得; 体力活动和久坐行为根据基线时经过有效验证的体力活动问卷获得[17],根据《儿童青少年身体活动能量消耗纲要》[18]确定各项身体活动的代谢当量(metabolic equivalent of task, MET),由此计算学龄儿童的中高强度体力活动(moderate-to-vigorous physical activity, MVPA)。
在调查开展前,研究团队对调查员进行统一严格的培训,以确保工作标准的一致性。在问卷调查阶段,调查员以面对面的方式指导参与者填写问卷,并及时解答相关疑问,以提高参与者的配合度和数据的可靠性。与此同时,采用食物图谱和标准餐具等辅助工具进行定量测量,以确保饮食信息的准确记录。在所有问卷经过核实后再收回,以确保数据的完整性。在信息录入阶段,采用双人双录入的方式,并由专门人员进行仔细校对,确保数据的准确性和完整性后再将其安全存入数据库。
数据采用EpiData 3.1软件双录入,使用SAS 9.4软件进行数据分析。经正态性检验,调查涉及的定量资料均不符合正态分布,故采用中位数和四分位数描述; 分类变量采用频数和百分比描述。使用χ2检验比较分类资料,Wilcoxon检验比较定量资料。采用广义线性回归模型分析膳食宏量营养素供能比与儿童肺功能的关联。进一步对性别和年龄进行交互作用和分层分析。统计学检验均为双侧检验,检验水准α=0.05。
1 112名完成随访的学龄儿童碳水化合物摄入量中位数为346.5 g/d,供能比为64.9%; 蛋白质摄入量中位数为79.5 g/d,供能比为14.9%; 脂肪摄入量中位数为46.8 g/d,供能比为20.2%。与男童相比,女童BMI-Z更高[男女童分别为-0.1(-0.8,0.7),0.2(-0.6,1.0)],每周MVPA时间更少[416.0(260.0,590.0),340.0(230.0,497.0)min],VCI更小[53.9(39.0,70.2),51.4(36.6,65.1)mL/kg](Z值分别为-3.93,4.37,3.52,P值均 < 0.05)。
广义线性回归分析结果显示,在模型1和2中,碳水化合物供能比与FVC-Z和VCI均呈负相关,脂肪供能比与FVC-Z和VCI均呈正相关(P值均 < 0.05); 蛋白质供能比与FVC-Z和VCI的相关性均无统计学意义(P值均>0.05)。见表1。
进一步对性别和年龄进行交互作用和分层分析,结果见表2~3。研究未观察到性别对宏量营养素供能比与肺功能关联的交互作用有统计学意义。但是按性别分层并调整混杂因素后,女童的碳水化合物供能比与FVC-Z和VCI均呈负相关,蛋白质供能比与FVC-Z和VCI均呈正相关,脂肪供能比与FVC-Z和VCI均呈正相关(P值均 < 0.05); 而在男童中未见统计学关联(P值均>0.05)。
年龄与三大宏量营养素供能比和肺功能关联都存在交互作用(P 交互值均 < 0.01)。按年龄分层并调整混杂因素后,在8~9和10~11岁儿童中,碳水化合物供能比与FVC-Z和VCI均呈负相关,脂肪供能比与FVC-Z和VCI均呈正相关(P值均 < 0.05); 在12~13岁儿童中未观察到统计学关联(P值均>0.05)。
本研究发现膳食宏量营养素与学龄儿童的肺功能有关,碳水化合物供能比与儿童肺功能呈负相关,脂肪供能比与儿童肺功能呈正相关,蛋白质供能比在女童中与肺功能呈正相关。三大宏量营养素与肺功能的前瞻性关联都存在年龄和性别差异。
本研究发现了低碳水化合物和高脂肪膳食对儿童肺功能的促进作用,与一项来自韩国的针对健康成人的前瞻性社区队列研究结果一致[19]。既往有研究认为碳水化合物含量高的食物会增加炎症因子的表达,引起气道炎症,从而与较低的肺功能有关[20-21]。已有的随机对照试验(randomized controlled trial, RCT)研究认为总脂肪摄入过多对肺功能的作用是不利的,可能的机制包括引起肥胖、炎症等[22],但同样也有RCT研究结果与本研究一致,认为低碳水、高脂肪的生酮膳食对肺功能存在潜在益处[23],其机制可能是增加上皮T细胞数量,该细胞可增强肺屏障的完整性[24]。上述证据的不一致性可能是由于食物来源、双键数量和脂肪酸碳链长度等特征的差异影响[25]。
关于蛋白质和儿童肺功能关系的相关研究目前较少,一项来自丹麦的RCT研究发现高蛋白膳食对早产儿的肺功能有益[26]。其可能的机制是处于生长发育阶段的健康儿童的身体处于正氮平衡状态,优质蛋白的摄入对儿童生长发育会产生有益影响[27],而良好的生长发育状态与儿童良好的肺功能密切相关[21]。本研究虽未观察到有统计学意义的交互效应,但分层分析结果表明较高的蛋白质供能比对女童的肺功能有益,而对男童的肺功能无影响。动物研究提示与雄性小鼠相比,雌性小鼠具有更高的细胞色素P450 1A1活性、细胞色素P450 1A2活性和蛋白质水平,这些因素在高氧性肺损伤中对肺功能具有保护作用[28]。因此女童蛋白质摄入可能会通过影响肺发育相关蛋白的表达促进肺功能[29]。
本研究结果表明低碳水、高脂肪膳食对肺功能的益处在低年龄段(8~11岁)儿童较为显著,而在高年龄段(12~13岁)儿童中未观察到统计学关联。可能是因为学龄早期是儿童肺发育的重要阶段,大多数肺功能轨迹建立在儿童早期[5]; 进入青春期后,性激素对儿童肺功能也有一定的调控作用[30],可能是本研究观察到年龄差异的原因,但尚需更多的证据支持。
本研究观察到的交互效应和分层分析结果的差异提示尽管已经调整了人口学特征、生活方式及体力活动等可能的混杂因素,但可能存在残余的混杂因素有待调整,有必要在大规模人群中检验本研究的结果,并进一步探讨相关机制。
  • 国家自然科学基金面上项目(82173512); 国家自然科学基金青年科学基金项目(82304135); 四川省科技厅应用基础项目(2021YJ0156)
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2025年第46卷第2期
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doi: 10.16835/j.cnki.1000-9817.2025060
  • 接收时间:2024-11-11
  • 首发时间:2026-11-06
  • 出版时间:2025-02-25
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  • 收稿日期:2024-11-11
  • 修回日期:2024-12-16
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国家自然科学基金面上项目(82173512); 国家自然科学基金青年科学基金项目(82304135); 四川省科技厅应用基础项目(2021YJ0156)
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    1四川大学华西公共卫生学院/华西第四医院,成都 610041
    2四川大学华西第二医院妇儿营养中心
    3四川大学华西护理学院

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2种不同金属材料的力学参数
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species
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Percentage of
total species (%)
属
Genus
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species
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鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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