Article(id=1324077501818995256, tenantId=1146029695717560320, journalId=1227665162245664772, issueId=1324077443828560770, articleNumber=null, orderNo=null, doi=10.20043/j.cnki.MPM.202509084, pmid=null, cstr=null, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=null, receivedDate=1757260800000, receivedDateStr=2025-09-08, revisedDate=null, revisedDateStr=null, acceptedDate=null, acceptedDateStr=null, onlineDate=1793614276603, onlineDateStr=2026-11-02, pubDate=1775750400000, pubDateStr=2026-04-10, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1793614276603, onlineIssueDateStr=2026-11-02, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1793614276603, creator=13701087609, updateTime=1793614276603, updator=13701087609, issue=Issue{id=1324077443828560770, tenantId=1146029695717560320, journalId=1227665162245664772, year='2026', volume='53', issue='7', pageStart='1153', pageEnd='1344', issueExtLink='null', onlineDate='null', pubDate='1775750400000', pubDateStr='2026-04-10', beforeIssueId=null, nextIssueId=null, price=null, status=1, issueComplete=1, articleOrder=1, issueType=-1, specialIssue=0, createTime=1793614262778, creator='13701087609', updateTime=1793614352085, updator='13701087609', preIssue=null, nextIssue=null, articleTotal=null, ext={EN=IssueExt(id=1324077818509918661, tenantId=1146029695717560320, journalId=1227665162245664772, issueId=1324077443828560770, language=EN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=), CN=IssueExt(id=1324077818509918662, tenantId=1146029695717560320, journalId=1227665162245664772, issueId=1324077443828560770, language=CN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=)}, issueFiles=null, downloadFileDto=null}, startPage=1277, endPage=1285, ext={EN=ArticleExt(id=1324077502087430713, articleId=1324077501818995256, tenantId=1146029695717560320, journalId=1227665162245664772, language=EN, title=Construction and validation of a risk assessment model for cognitive impairment in illiterate elderly individuals: an empirical study based on CHARLS data, columnId=1228016572892119056, journalTitle=Modern Preventive Medicine, columnName=Primary Health Services, runingTitle=null, highlight=null, articleAbstract=
Objective

To analyze the influencing factors of cognitive impairment and construct a risk assessment model for illiterate elderly individuals.

Methods

Based on the 2020 China Health and Retirement Longitudinal Study (CHARLS) database, illiterate elderly individuals aged≥60 years were taken as the research subjects. Ten-fold cross-validated LASSO regression was used to identify the optimal predictor variables. Logistic regression was further applied to explore the risk factors of cognitive impairment in this population, and an assessment model was further constructed. The performance of the model was evaluated using the receiver operating characteristic (ROC) curve, area under the curve (AUC), sensitivity, specificity, Hosmer-Lemeshow test, calibration curve, decision curve analysis (DCA), categorical/continuous net reclassification improvement (NRI), and integrated discrimination improvement (IDI).

Results

A total of 1 575 illiterate elderly individuals were included in this study, with a prevalence of cognitive impairment of 39.75%. Lasso regression screened potential predictor variables, including age, marital status, residence type, alcohol consumption, physical activity, social engagement, and internet use. Multivariable logistic regression analysis showed that advanced age (70-79 years: OR=1.509, 95% CI: 1.120-2.032; ≥80 years: OR=2.178, 95% CI: 1.341-3.537), rural residence (OR=1.631, 95% CI: 1.159-2.295) were the risk factors. In contrast, being married (OR=0.607, 95% CI: 0.450-0.817), alcohol consumption (OR=0.647, 95% CI: 0.471-0.888), social engagement (OR=0.683, 95% CI: 0.524-0.891), moderate-to-high intensity physical activity (moderate intensity: OR=0.633, 95% CI: 0.428-0.937; high intensity: OR=0.628, 95% CI: 0.439-0.898), internet use (OR=0.327, 95% CI: 0.184-0.581) were protective factors. An assessment model was established based on the seven factors. The areas under the ROC curves of the assessment model in the training and validation sets were 0.670 and 0.655, respectively. The Hosmer-Lemeshow χ2=11.977, P=0.152, and χ2=7.977, P=0.436. Brier scores were 0.216 and 0.227, respectively. The calibration curve revealed good consistency between the predicted values and the actual values, and the DCA indicated that the model had good net benefit and assessment accuracy. Additionally, the model showed a significant incremental improvement in terms of risk reclassification.

Conclusion

The risk assessment model for cognitive impairment in illiterate elderly individuals, based on seven influencing factors including age and residence type, can provide support for the early identification of cognitive impairment in this population.

, authors=Li-hong JI1, 2, 3, Xiao-qing ZHAO1, 2, 3, Hai-yan LI2, 3, 4, Zhi-wei DONG2, 3, 4, Qi JING2, 3, 4, 5, authorsList=Li-hong JI, Xiao-qing ZHAO, Hai-yan LI, Zhi-wei DONG, Qi JING, authorCompany=null, correspAuthors=Qi JING, authorNote=null, correspAuthorsNote=null, copyrightStatement=null, 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=1324077505388347976, articleId=1324077501818995256, tenantId=1146029695717560320, journalId=1227665162245664772, language=CN, title=文盲老年人认知障碍风险评估模型构建与验证——基于CHARLS数据的实证研究, columnId=1228016573533847611, journalTitle=现代预防医学, columnName=基层卫生服务, runingTitle=null, highlight=null, articleAbstract=
目的

分析文盲老年人认知障碍的影响因素,构建文盲老年人认知障碍风险评估模型。

方法

基于2020年中国健康与养老追踪调查数据库,以60岁以上文盲老年人为研究对象,采用LASSO回归十折交叉验证法确定最佳预测变量,应用logistic回归确定文盲老年人认知障碍影响因素,进而构建评估模型。通过受试者工作特征(receiver operating characteristic,ROC)曲线、曲线下面积、灵敏度、特异度、Hosmer-Lemeshow检验、校准曲线以及决策曲线分析(decision curve analysis,DCA)、分类/连续净重新分类指数及综合判别改善指数,对模型的性能进行评估。

结果

文盲老年人1 575例,认知障碍发生率为39.75%。LASSO回归筛选出潜在预测变量:年龄、婚姻、居住地类型、饮酒、体力活动、社交、上网。多因素logistic回归分析显示,高龄(70~79岁OR=1.509,95%CI:1.120~2.032;≥80岁OR=2.178,95%CI:1.341~3.537)、居住在农村(OR=1.631,95%CI:1.159~2.295)是危险因素,而有配偶(OR=0.607,95%CI:0.450~0.817)、饮酒(OR=0.647,95%CI:0.471~0.888)、社交(OR=0.683,95%CI:0.524~0.891)、中高等强度体力活动(中等强度OR=0.633,95%CI:0.428~0.937;高强度OR=0.628,95%CI:0.439~0.898)、上网(OR=0.327,95%CI:0.184~0.581)是保护因素。基于这7个因素构建评估模型,该模型训练集和验证集的ROC曲线下面积分别为0.670和0.655;Hosmer-Lemeshow检验分别为χ2=11.977(P=0.152)和χ2=7.977(P=0.436);校准曲线Brier分数分别是0.216和0.227,校准曲线呈现预测值和实际值一致性较好,DCA显示该模型净效益和评估准确性良好,且模型在风险重分类方面具有显著的增量改进。

结论

基于年龄、居住地类型等7个影响因素构建的文盲老年人认知障碍风险评估模型,可为该人群认知障碍的早期识别提供支持。

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嵇丽红(1987—),女,硕士,实验师,研究方向:卫生政策与管理

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井淇,E-mail:
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2.“健康山东”重大社会风险预测与治理协同创新中心,山东 潍坊 261053
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2.“健康山东”重大社会风险预测与治理协同创新中心,山东 潍坊 261053
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3.山东第二医科大学康复健康研究院,山东 潍坊 261053
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Study on the relationship between Internet use and cognitive function in older adults from the perspective of healthy aging[J]. Chinese Health Service Management, 2024, 41(7): 834-840. (In Chinese), articleTitle=Study on the relationship between Internet use and cognitive function in older adults from the perspective of healthy aging, refAbstract=null), Reference(id=1324077519862891205, tenantId=1146029695717560320, journalId=1227665162245664772, articleId=1324077501818995256, doi=null, pmid=null, pmcid=null, year=2025, volume=44, issue=5, pageStart=null, pageEnd=null, url=null, language=null, rfNumber=[27], rfOrder=48, authorNames=Van leeuwen FD, Steyerberg EW, van Klaveren D, journalName=Medicine Statistics, refType=null, unstructuredReference=Van leeuwen FD, Steyerberg EW, van Klaveren D, et al. Instability of the AUROC of clinical prediction models[J]. Medicine Statistics, 2025, 44(5): e70011., articleTitle=Instability of the AUROC of clinical prediction models, refAbstract=null), Reference(id=1324077519950971590, tenantId=1146029695717560320, journalId=1227665162245664772, articleId=1324077501818995256, doi=null, pmid=null, pmcid=null, year=2024, volume=34, issue=12, pageStart=7892, pageEnd=7894, url=null, language=null, rfNumber=[28], rfOrder=49, authorNames=Huisman M, journalName=European Radiology, refType=null, unstructuredReference=Huisman M. When AUC-ROC and accuracy are not accurate: what everyone needs to know about evaluating artificial intelligence in radiology[J]. European Radiology, 2024, 34(12): 7892-7894., articleTitle=When AUC-ROC and accuracy are not accurate: what everyone needs to know about evaluating artificial intelligence in radiology, refAbstract=null)], funds=[Fund(id=1324077512212480659, tenantId=1146029695717560320, journalId=1227665162245664772, articleId=1324077501818995256, awardId=72004165; 72374156, language=CN, fundingSource=国家自然科学基金资助项目(72004165; 72374156), fundOrder=null, country=null), Fund(id=1324077513944728212, tenantId=1146029695717560320, journalId=1227665162245664772, articleId=1324077501818995256, awardId=2022RW075, language=CN, fundingSource=山东省高等学校“青创团队计划”团队研究课题(2022RW075), fundOrder=null, country=null)], companyList=[AuthorCompany(id=1324077505849721417, tenantId=1146029695717560320, journalId=1227665162245664772, articleId=1324077501818995256, xref=1., ext=[AuthorCompanyExt(id=1324077505866498634, tenantId=1146029695717560320, journalId=1227665162245664772, articleId=1324077501818995256, companyId=1324077505849721417, language=EN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=School of Public Health, Shandong Second Medical University, Weifang, Shandong 261053, China), AuthorCompanyExt(id=1324077505874887243, tenantId=1146029695717560320, journalId=1227665162245664772, articleId=1324077501818995256, companyId=1324077505849721417, language=CN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=1.山东第二医科大学公共卫生学院,山东 潍坊 261053)]), AuthorCompany(id=1324077505950384716, tenantId=1146029695717560320, journalId=1227665162245664772, articleId=1324077501818995256, xref=2., ext=[AuthorCompanyExt(id=1324077506155905613, tenantId=1146029695717560320, journalId=1227665162245664772, articleId=1324077501818995256, companyId=1324077505950384716, language=CN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=2.“健康山东”重大社会风险预测与治理协同创新中心,山东 潍坊 261053)]), AuthorCompany(id=1324077506227208782, tenantId=1146029695717560320, journalId=1227665162245664772, articleId=1324077501818995256, xref=3., ext=[AuthorCompanyExt(id=1324077506235597391, tenantId=1146029695717560320, journalId=1227665162245664772, articleId=1324077501818995256, companyId=1324077506227208782, language=CN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=3.山东第二医科大学康复健康研究院,山东 潍坊 261053)]), AuthorCompany(id=1324077506323677776, tenantId=1146029695717560320, journalId=1227665162245664772, articleId=1324077501818995256, xref=4., ext=[AuthorCompanyExt(id=1324077506344649297, tenantId=1146029695717560320, journalId=1227665162245664772, articleId=1324077501818995256, companyId=1324077506323677776, language=CN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=4.山东第二医科大学管理学院,山东 潍坊 261053)]), AuthorCompany(id=1324077506642444882, tenantId=1146029695717560320, journalId=1227665162245664772, articleId=1324077501818995256, xref=5., ext=[AuthorCompanyExt(id=1324077506650833491, tenantId=1146029695717560320, journalId=1227665162245664772, articleId=1324077501818995256, companyId=1324077506642444882, language=CN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=5.山东第二医科大学ICF研究院,山东 潍坊 261053)])], figs=[ArticleFig(id=1324077510555730561, tenantId=1146029695717560320, journalId=1227665162245664772, articleId=1324077501818995256, language=EN, label=Figure 1, caption=Flow chart of sample selection, figureFileSmall=xDwITIzTvTB3IVk+UABESg==, figureFileBig=7eRLckiQaTgjGsF2RbTG+w==, tableContent=null), ArticleFig(id=1324077510635422338, tenantId=1146029695717560320, journalId=1227665162245664772, articleId=1324077501818995256, language=CN, label=图1, caption=样本筛选流程图, figureFileSmall=xDwITIzTvTB3IVk+UABESg==, figureFileBig=7eRLckiQaTgjGsF2RbTG+w==, tableContent=null), ArticleFig(id=1324077510832554627, tenantId=1146029695717560320, journalId=1227665162245664772, articleId=1324077501818995256, language=EN, label=Figure 2, caption=Screening of optimal predictive variables by LASSO regression, figureFileSmall=iJjOj3jfPNh2+kGSRisYMA==, figureFileBig=/5NYgtzzulyPNHjXdtizjg==, tableContent=null), ArticleFig(id=1324077510908052100, tenantId=1146029695717560320, journalId=1227665162245664772, articleId=1324077501818995256, language=CN, label=图2, caption=LASSO回归确定最佳预测变量

注:A为自变量的系数曲线;B为十折交叉验证法结果,左侧线是lambda.min,右侧线是lambda.1se。

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注:A为训练集;B为验证集。

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注:A为训练集;B为验证集。

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注:A为训练集;B为验证集。

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Comparison of training and validation sets

, figureFileSmall=null, figureFileBig=null, tableContent=
变量总样本(n=1 575)训练集(n=1 103)验证集(n=472)χ2值P值
性别1.2040.272
女1 258873385
男31723087
年龄(岁)4.4830.106
60~691 049745304
70~79415275140
≥801118328
婚姻状况0.1190.730
有配偶1 177827350
无配偶398276122
居住地类型0.5650.452
城市30521986
农村1 270884386
吸烟0.0170.896
是22315766
否1 352946406
饮酒1.7480.186
是34024892
否1 235855380
体力活动1.6130.446
低强度26617888
中等强度429306123
高强度880619261
社交1.6410.200
有659473186
无916630286
抑郁1.3470.246
是826589237
否749514245
自评健康6.4720.167
很好20114457
好16511451
一般718520198
不好340221119
很不好15110447
慢性病1.6760.195
有619422197
无956681275
ADL0.1470.701
完全或条件性独立1 4261 000425
日常生活功能障碍15010347
睡眠时长1.2140.545
短睡眠736509227
正常睡眠686490196
长睡眠15310449
午睡0.1350.713
是920641279
否655462193
上网2.3640.124
是14010634
否1 435997438
是否五保户/低保户/特困户0.6250.429
是28220379
否1 293900393
), ArticleFig(id=1324077511675609742, tenantId=1146029695717560320, journalId=1227665162245664772, articleId=1324077501818995256, language=CN, label=表1, caption=

训练集和验证集对比

, figureFileSmall=null, figureFileBig=null, tableContent=
变量总样本(n=1 575)训练集(n=1 103)验证集(n=472)χ2值P值
性别1.2040.272
女1 258873385
男31723087
年龄(岁)4.4830.106
60~691 049745304
70~79415275140
≥801118328
婚姻状况0.1190.730
有配偶1 177827350
无配偶398276122
居住地类型0.5650.452
城市30521986
农村1 270884386
吸烟0.0170.896
是22315766
否1 352946406
饮酒1.7480.186
是34024892
否1 235855380
体力活动1.6130.446
低强度26617888
中等强度429306123
高强度880619261
社交1.6410.200
有659473186
无916630286
抑郁1.3470.246
是826589237
否749514245
自评健康6.4720.167
很好20114457
好16511451
一般718520198
不好340221119
很不好15110447
慢性病1.6760.195
有619422197
无956681275
ADL0.1470.701
完全或条件性独立1 4261 000425
日常生活功能障碍15010347
睡眠时长1.2140.545
短睡眠736509227
正常睡眠686490196
长睡眠15310449
午睡0.1350.713
是920641279
否655462193
上网2.3640.124
是14010634
否1 435997438
是否五保户/低保户/特困户0.6250.429
是28220379
否1 293900393
), ArticleFig(id=1324077511776273039, tenantId=1146029695717560320, journalId=1227665162245664772, articleId=1324077501818995256, language=EN, label=Table 2, caption=

Variable assignment

, figureFileSmall=null, figureFileBig=null, tableContent=
变量赋值方法
认知障碍是=1,否=0
性别男=1,女=0
年龄(岁)60~69=0,70~79=1,≥80=2
婚姻状况有配偶=1,无配偶=0
居住地类型农村=1,城市=0
体力活动低=0,中=1,高=2
饮酒是=1,否=0
吸烟是=1,否=0
社交是=1,否=0
自评健康很不好=1,不好=2,一般=3,好=4,很好=5
慢性病是=1,否=0
抑郁是=1,否=0
ADL完全或条件性独立=1,日常生活功能障碍=0
睡眠时长短睡眠=0,正常睡眠=1,长睡眠=2
午睡是=1,否=0
上网是=1,否=0
家庭经济情况是五保户/低保户/贫困户=1,不是五保户/低保户/贫困户=0
), ArticleFig(id=1324077511864353424, tenantId=1146029695717560320, journalId=1227665162245664772, articleId=1324077501818995256, language=CN, label=表2, caption=

变量赋值

, figureFileSmall=null, figureFileBig=null, tableContent=
变量赋值方法
认知障碍是=1,否=0
性别男=1,女=0
年龄(岁)60~69=0,70~79=1,≥80=2
婚姻状况有配偶=1,无配偶=0
居住地类型农村=1,城市=0
体力活动低=0,中=1,高=2
饮酒是=1,否=0
吸烟是=1,否=0
社交是=1,否=0
自评健康很不好=1,不好=2,一般=3,好=4,很好=5
慢性病是=1,否=0
抑郁是=1,否=0
ADL完全或条件性独立=1,日常生活功能障碍=0
睡眠时长短睡眠=0,正常睡眠=1,长睡眠=2
午睡是=1,否=0
上网是=1,否=0
家庭经济情况是五保户/低保户/贫困户=1,不是五保户/低保户/贫困户=0
), ArticleFig(id=1324077511935656593, tenantId=1146029695717560320, journalId=1227665162245664772, articleId=1324077501818995256, language=EN, label=Table 3, caption=

Logistic regression analysis results for cognitive impairment in illiterate elderly individuals

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变量β Waldχ2值P值OR值(95%CI)
年龄(岁,60~69)14.2730.001
70~790.4110.1527.3250.0071.509(1.120~2.032)
≥800.7780.2479.9070.0022.178(1.341~3.537)
婚姻状况-0.5000.15210.8090.0010.607(0.450~0.817)
居住地类型0.4890.1747.8820.0051.631(1.159~2.295)
饮酒-0.4360.1627.2600.0070.647(0.471~0.888)
社交-0.3810.1367.8880.0050.683(0.524~0.891)
体力活动(低)7.0710.029
中-0.4570.2005.2290.0220.633(0.428~0.937)
高-0.4650.1826.5060.0110.628(0.439~0.898)
上网-1.1190.29414.5150.0000.327(0.184~0.581)
), ArticleFig(id=1324077512023736978, tenantId=1146029695717560320, journalId=1227665162245664772, articleId=1324077501818995256, language=CN, label=表3, caption=

文盲老年人认知障碍的logistic回归分析结果

, figureFileSmall=null, figureFileBig=null, tableContent=
变量β Waldχ2值P值OR值(95%CI)
年龄(岁,60~69)14.2730.001
70~790.4110.1527.3250.0071.509(1.120~2.032)
≥800.7780.2479.9070.0022.178(1.341~3.537)
婚姻状况-0.5000.15210.8090.0010.607(0.450~0.817)
居住地类型0.4890.1747.8820.0051.631(1.159~2.295)
饮酒-0.4360.1627.2600.0070.647(0.471~0.888)
社交-0.3810.1367.8880.0050.683(0.524~0.891)
体力活动(低)7.0710.029
中-0.4570.2005.2290.0220.633(0.428~0.937)
高-0.4650.1826.5060.0110.628(0.439~0.898)
上网-1.1190.29414.5150.0000.327(0.184~0.581)
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文盲老年人认知障碍风险评估模型构建与验证——基于CHARLS数据的实证研究
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嵇丽红 1, 2, 3 , 赵晓晴 1, 2, 3 , 李海燕 2, 3, 4 , 董志伟 2, 3, 4 , 井淇 2, 3, 4, 5
现代预防医学 | 基层卫生服务 2026,53(7): 1277-1285
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现代预防医学 |基层卫生服务 2026 , 53 (7) : 1277 -1285
文盲老年人认知障碍风险评估模型构建与验证——基于CHARLS数据的实证研究
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嵇丽红1, 2, 3, 赵晓晴1, 2, 3, 李海燕2, 3, 4, 董志伟2, 3, 4, 井淇2, 3, 4, 5
作者信息
  • 1.山东第二医科大学公共卫生学院,山东 潍坊 261053
  • 2.“健康山东”重大社会风险预测与治理协同创新中心,山东 潍坊 261053
  • 3.山东第二医科大学康复健康研究院,山东 潍坊 261053
  • 4.山东第二医科大学管理学院,山东 潍坊 261053
  • 5.山东第二医科大学ICF研究院,山东 潍坊 261053
通讯作者:
井淇,E-mail:
作者简介:

嵇丽红(1987—),女,硕士,实验师,研究方向:卫生政策与管理

Construction and validation of a risk assessment model for cognitive impairment in illiterate elderly individuals: an empirical study based on CHARLS data
Li-hong JI1, 2, 3, Xiao-qing ZHAO1, 2, 3, Hai-yan LI2, 3, 4, Zhi-wei DONG2, 3, 4, Qi JING2, 3, 4, 5
Affiliations
  • School of Public Health, Shandong Second Medical University, Weifang, Shandong 261053, China
出版时间: 2026-04-10 doi: 10.20043/j.cnki.MPM.202509084
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目的

分析文盲老年人认知障碍的影响因素,构建文盲老年人认知障碍风险评估模型。

方法

基于2020年中国健康与养老追踪调查数据库,以60岁以上文盲老年人为研究对象,采用LASSO回归十折交叉验证法确定最佳预测变量,应用logistic回归确定文盲老年人认知障碍影响因素,进而构建评估模型。通过受试者工作特征(receiver operating characteristic,ROC)曲线、曲线下面积、灵敏度、特异度、Hosmer-Lemeshow检验、校准曲线以及决策曲线分析(decision curve analysis,DCA)、分类/连续净重新分类指数及综合判别改善指数,对模型的性能进行评估。

结果

文盲老年人1 575例,认知障碍发生率为39.75%。LASSO回归筛选出潜在预测变量:年龄、婚姻、居住地类型、饮酒、体力活动、社交、上网。多因素logistic回归分析显示,高龄(70~79岁OR=1.509,95%CI:1.120~2.032;≥80岁OR=2.178,95%CI:1.341~3.537)、居住在农村(OR=1.631,95%CI:1.159~2.295)是危险因素,而有配偶(OR=0.607,95%CI:0.450~0.817)、饮酒(OR=0.647,95%CI:0.471~0.888)、社交(OR=0.683,95%CI:0.524~0.891)、中高等强度体力活动(中等强度OR=0.633,95%CI:0.428~0.937;高强度OR=0.628,95%CI:0.439~0.898)、上网(OR=0.327,95%CI:0.184~0.581)是保护因素。基于这7个因素构建评估模型,该模型训练集和验证集的ROC曲线下面积分别为0.670和0.655;Hosmer-Lemeshow检验分别为χ2=11.977(P=0.152)和χ2=7.977(P=0.436);校准曲线Brier分数分别是0.216和0.227,校准曲线呈现预测值和实际值一致性较好,DCA显示该模型净效益和评估准确性良好,且模型在风险重分类方面具有显著的增量改进。

结论

基于年龄、居住地类型等7个影响因素构建的文盲老年人认知障碍风险评估模型,可为该人群认知障碍的早期识别提供支持。

文盲老年人  /  认知障碍  /  列线图  /  评估模型
Objective

To analyze the influencing factors of cognitive impairment and construct a risk assessment model for illiterate elderly individuals.

Methods

Based on the 2020 China Health and Retirement Longitudinal Study (CHARLS) database, illiterate elderly individuals aged≥60 years were taken as the research subjects. Ten-fold cross-validated LASSO regression was used to identify the optimal predictor variables. Logistic regression was further applied to explore the risk factors of cognitive impairment in this population, and an assessment model was further constructed. The performance of the model was evaluated using the receiver operating characteristic (ROC) curve, area under the curve (AUC), sensitivity, specificity, Hosmer-Lemeshow test, calibration curve, decision curve analysis (DCA), categorical/continuous net reclassification improvement (NRI), and integrated discrimination improvement (IDI).

Results

A total of 1 575 illiterate elderly individuals were included in this study, with a prevalence of cognitive impairment of 39.75%. Lasso regression screened potential predictor variables, including age, marital status, residence type, alcohol consumption, physical activity, social engagement, and internet use. Multivariable logistic regression analysis showed that advanced age (70-79 years: OR=1.509, 95% CI: 1.120-2.032; ≥80 years: OR=2.178, 95% CI: 1.341-3.537), rural residence (OR=1.631, 95% CI: 1.159-2.295) were the risk factors. In contrast, being married (OR=0.607, 95% CI: 0.450-0.817), alcohol consumption (OR=0.647, 95% CI: 0.471-0.888), social engagement (OR=0.683, 95% CI: 0.524-0.891), moderate-to-high intensity physical activity (moderate intensity: OR=0.633, 95% CI: 0.428-0.937; high intensity: OR=0.628, 95% CI: 0.439-0.898), internet use (OR=0.327, 95% CI: 0.184-0.581) were protective factors. An assessment model was established based on the seven factors. The areas under the ROC curves of the assessment model in the training and validation sets were 0.670 and 0.655, respectively. The Hosmer-Lemeshow χ2=11.977, P=0.152, and χ2=7.977, P=0.436. Brier scores were 0.216 and 0.227, respectively. The calibration curve revealed good consistency between the predicted values and the actual values, and the DCA indicated that the model had good net benefit and assessment accuracy. Additionally, the model showed a significant incremental improvement in terms of risk reclassification.

Conclusion

The risk assessment model for cognitive impairment in illiterate elderly individuals, based on seven influencing factors including age and residence type, can provide support for the early identification of cognitive impairment in this population.

Illiterate elderly individuals  /  Cognitive impairment  /  Nomogram  /  Assessment model
嵇丽红, 赵晓晴, 李海燕, 董志伟, 井淇. 文盲老年人认知障碍风险评估模型构建与验证——基于CHARLS数据的实证研究. 现代预防医学, 2026 , 53 (7) : 1277 -1285 . DOI: 10.20043/j.cnki.MPM.202509084
Li-hong JI, Xiao-qing ZHAO, Hai-yan LI, Zhi-wei DONG, Qi JING. Construction and validation of a risk assessment model for cognitive impairment in illiterate elderly individuals: an empirical study based on CHARLS data[J]. Modern Preventive Medicine, 2026 , 53 (7) : 1277 -1285 . DOI: 10.20043/j.cnki.MPM.202509084
认知障碍(cognitive impairment)是指脑局部组织病变或受损而产生的知觉、记忆、思维等认知功能损害的总体描述,根据进展程度可分为轻、中、重度等。随着全球人口老龄化的加速,认知障碍发病率持续上升,发病年轻化,易发展为不可逆转且无法治愈的老年失智症[1],成为影响健康老龄化的重大公共卫生问题之一。研究证实,认知障碍在轻度期具有可逆性、可控性,及时进行干预与管理可以实现功能逆转、维持稳定、延缓发展,其向正常认知功能总体逆转率可达18%~26%[1-2]。因此,对认知障碍高危人群进行影响因素的早期识别与评估至关重要。
国家统计局在全国人口普查公报中将文盲界定为15岁及以上不识字的人[3]。由于未接受过正规的系统教育,文盲老年人不具备对汉字及其衍生符号的认知能力和读写能力,在词汇量和语言表达、学习新知识、理解复杂信息等认知领域也存在局限;另外,受制于语言和认知能力的限制,其接受新事物的能力较差,社会参与度低,可获得的社会支持不足[4]。上述特点导致文盲老年人的认知储备较低,更易因认知能力下降而发展为认知障碍[5-6]。尽早识别文盲老年人群认知障碍的影响因素并构建评估模型,对于降低其认知障碍发生风险、减少失智症的患病率具有重要意义。目前针对文盲老年人群的认知障碍风险评估研究仍较为缺乏,而传统认知障碍评估模型的评估指标多以文字能力为基础,且多将教育程度作为单一调节变量,忽视了文盲状态背后的独特风险机制。因此,有必要识别文盲老年人认知障碍的影响因素并构建评估模型。
本研究将中国健康与养老追踪调查(China Health and Retirement Longitudinal Study,CHARLS)中的文盲老年人群作为样本,构建评估模型以尽早发现与识别文盲老年人认知障碍风险,为文盲老年家庭及相关工作人员提供便捷、简化的评估工具。
本研究数据来源于CHARLS 2020年随访数据库中基本信息、健康状况与功能、家户收入与支出三个模块,选取60岁及以上文盲老年人3 262例,剔除认知功能等信息缺失样本,纳入本次研究的总有效样本为1 575例,见图1。通过设置随机种子,将1 575例文盲老年人按7∶3随机分为训练集(n=1 103)和验证集(n=472)。
(1)人口学特征:性别、年龄、居住地类型、婚姻状况。
(2)生活方式及健康状况:吸烟、饮酒、体力活动、社交、睡眠时长、午睡、上网、自评健康、慢性病、抑郁、日常生活活动能力(activities of daily living,ADL)。
体力活动水平参照国际体力活动量表进行评估[7],低强度、中等强度、高强度活动代谢当量(metabolic equivalent of task,MET)分别赋值为3.3、4.0、8.0,将10 min≤活动时间<0.5 h赋值为30 min、0.5 h≤活动时间<2 h赋值为60 min、2 h≤活动时间<4 h赋值为180 min、活动时间≥4 h赋值为240 min,体力活动能量消耗公式定义为:体力活动强度(MET)×每天活动时间×活动天数,根据每周活动能量消耗,将老年人活动水平分为低(<600 MET/周)、中(600~3 000 MET/周)和高(>3 000 MET/周)水平。
睡眠时长参考既往研究[8-9]分为短睡眠(<6 h)、正常睡眠(6~8 h)、长睡眠(>8 h)。
抑郁状况利用流调中心抑郁量表简版(center for epidemiological studies depression scale 10,CES-D10)[10-11]进行评定,量表由十个条目组成,每个条目4个选项(计分范围0~3分),总分达到10分及以上即可界定为抑郁。
ADL采用躯体日常生活自理能力量表(physical self maintenance scale,PSMS)以及工具性日常生活能力量表(instrumental activities of daily living,IADL)[12]进行评估,其中PSMS和IADL各有6个条目,每个条目的评分为7.0、6.0、4.0和1.5分,最终合并总分≤72分为完全或有条件依赖(即日常生活功能障碍);总分≥72分为完全或有条件独立[13]。
(3)经济水平:家庭是否为五保户、低保户或特困户。
(4)认知能力:涵盖情景记忆及执行功能。情景记忆是记住并回想10个无关联的中文词,根据回忆准确度计分(满分10分)。执行功能满分11分,包括确认时间信息(年、月、日、季节、星期几)、做5次从100连续减7的算术、模仿画图。两维度得分相加,低于6分即认定为有认知障碍[14-15]。
数据分析使用SPSS 26.0及R 4.4.2软件。计数资料采用频数、χ2检验进行描述分析。分别采用LASSO回归、logistic回归确定文盲老年人认知障碍风险的最佳预测变量及影响因素。LASSO回归通过惩罚性回归实现变量筛选与共线性控制,确保模型稳定性与校正效果,多因素logistic回归分析中,将LASSO回归筛选出的变量同时纳入模型,以控制变量间的相互混杂。在此基础上构建风险评估模型,并通过受试者工作特征(receiver operating characteristic,ROC)曲线、曲线下面积(area under the curve,AUC)、灵敏度、特异度、Hosmer-Lemeshow检验、校准曲线以及决策曲线分析(decision curve analysis,DCA)评估模型的性能。构建基线模型(Model 0)与最终模型(Model 1)并在验证集中计算AUC及95%置信区间,采用DeLong方法检验两模型AUC差异,同时计算分类/连续净重新分类指数(net reclassification improvement,NRI)及综合判别改善指数(integrated discrimination improvement,IDI),以评估模型增量价值,其中分类NRI的风险分层阈值设定为0.2与0.4。检验水准α=0.05。
本研究中文盲老年人1 575例,其中合并认知障碍者626例,认知障碍检出率为39.75%。训练集和验证集在性别、年龄、婚姻状况、居住地类型、吸烟、饮酒、体力活动、社交、抑郁、自评健康、慢性病、ADL等基线资料上的分布,差异无统计学意义(P>0.05)。见表1。
研究采用LASSO回归确定最佳预测变量,其中因变量为是否发生认知障碍,自变量纳入性别、年龄等16个因素,采用十折交叉验证法确定最优λ,即lambda.1se。经计算,本研究最优λ值为0.032,依据此λ确定了7个最佳预测变量,即年龄、婚姻状况、居住地类型、饮酒、体力活动、社交、上网。见图2、表2。
以LASSO回归确定的7个最佳预测变量为自变量进行logistic回归分析。结果显示,年龄、婚姻状况等7个最佳预测变量均为文盲老年人认知障碍的独立影响因素(P<0.05)。见表3。
以logistic回归筛选出的7个文盲老年人认知障碍影响因素为变量构建评估模型,并绘制列线图。通过各因素对应得分之和可评估文盲老年人出现认知障碍的风险,总分越高,风险越大。见图3。
为进一步评估模型的性能,本研究分别利用训练集及验证集数据开展模型评价和内部验证。其中,训练集及验证集ROC曲线下面积分别为0.670(95%CI:0.641~0.706)和0.655(95%CI:0.606~0.705),见图4,最佳截断值分别为0.417和0.449,灵敏度分别为0.606和0.540,特异度分别为0.666和0.711;Hosmer-Lemeshow检验结果分别为χ2=11.977(P=0.152)和χ2=7.977(P=0.436);校准曲线Brier分数分别为0.216和0.227,处于中等水平,低于0.25的随机阈值,见图5;决策曲线显示该模型净效益和预测准确性良好,见图6。
构建基线模型Model 0,纳入基础人口学变量,并与最终模型Model 1(纳入年龄、婚姻状况、居住地类型、饮酒、社交、体力活动、上网)在验证集中进行比较。结果显示,Model 1的验证集AUC为0.655(95%CI:0.606~0.705),略高于Model 0的0.621(95%CI:0.571~0.671),但DeLong检验提示差异未达到统计学显著(P=0.145)。在风险分层阈值(0.2、0.4)下,Model 1相较Model 0的分类NRI为0.108(P=0.021),连续NRI为0.228(P=0.010),IDI为0.024(P=0.004),提示最终模型在风险重分类方面具有显著的增量改进(P<0.05)。
本研究中我国文盲老年人认知障碍的检出率达39.75%,明显高于施正丽等[16]2025年报告的我国老年人认知障碍检出率(20.05%)、何南芙等[17]2023年报告的65岁以上老年人认知障碍检出率(28.9%),说明文盲老年人认知功能状况不容乐观,也再次验证了受教育是认知功能的保护因素。
文盲老年人群中,居住在农村的高龄无配偶人群更易发生认知障碍,与国内外老年人群的研究结果一致[5,16,18-19]。年龄的增长会导致人体组织及器官出现退行性变,大脑结构中负责认知功能相关的海马体等区域逐步萎缩,叠加慢性病症增多、社会参与及社会支持减少等多种因素,影响老年人的认知能力[20]。无配偶状态使得老年人失去陪伴及信息、情感等方面的支持,社交及思维活动减少;农村地区生活环境单一及经济条件限制,老年人健康素养水平与城市相比有一定差距,这些不利因素均加剧了认知障碍的发生风险。文盲老年人由于自身的认知局限,无法缓解高龄、无配偶等带来的负面影响,更易出现认知障碍。
本研究结果显示,饮酒是文盲老年人认知障碍的保护因素。以往相关研究表明,适度饮酒不仅可以促进血液循环,刺激人体中枢神经,起到活血化瘀、舒缓情绪的作用,还可以改善睡眠质量,保护老年人认知功能[21]。但也有研究证实饮酒与认知障碍高风险相关[22],探究其原因可能是饮酒会对中枢神经系统产生毒性作用从而造成急性损伤,或者造成慢性酒精中毒,导致大脑组织损伤和认知功能的退化[23]。因此,饮酒与认知障碍的相关性尚未达成共识,未来还需将饮酒频次、饮酒量、饮酒种类等因素纳入研究以做进一步探讨。
社交、体力活动与上网是文盲老年人认知功能的保护因素。以往多项研究[24-25]也证实了积极参加社交活动、且体力活动频次更高的老年人群晚年认知功能表现更佳。社交可以为文盲老年人提供智力及情感刺激,锻炼其记忆、理解能力,进而延缓其认知功能下降,而适当强度的体力活动不仅能缓解或改善疾病状况来促进文盲老年人身体健康,还可以促进血液循环和缓解中枢神经系统的退化,为认知功能的改善提供生理基础[20];经常社交与活动的老年人心理状态也会更加积极乐观,从而对认知功能产生积极促进作用。在互联网普及的大环境下,文盲老年人可以通过学习和适应互联网及其产品,充分调动学习积极性,提高大脑活跃度,形成新的认知刺激,增加大脑的认知储备,减少认知能力的下降[26],同时通过互联网的使用可以增加社会互动,掌握新的生活技能,接触丰富的信息与资源,提高其认知能力和生活质量。
从结果来看,本研究模型AUC为0.67,提示其区分能力处于中等水平,仍有提升空间,但分类NRI、连续NRI与IDI结果显示模型在个体风险分层与预测概率区分方面具有统计学显著的增量改进,提示模型的价值可能更多体现在风险重分类层面,而非单纯AUC指数的大幅提升。已有研究指出[27-28],仅依赖AUC评价风险评估模型可能造成误判,AUC不足以单独证明模型能否改善公共卫生或临床决策,在筛查与风险分层应用中,校准与净获益同样关键,因此本研究结合灵敏度、特异度、Hosmer检验、校准曲线、Brier评分及DCA等对模型进行了综合评价。本模型更适用于社区初筛与风险分层评估场景,未来仍需在更多特征集与前瞻性随访队列中进一步验证其稳定性与推广价值,提升模型性能。
综上,本研究针对文盲老年人群构建的可操作风险评估模型,可以为文盲老年人家属及相关工作者提供便捷、简化的识别与评估工具,具备公共卫生筛查意义。
  • 国家自然科学基金资助项目(72004165; 72374156)
  • 山东省高等学校“青创团队计划”团队研究课题(2022RW075)
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2026年第53卷第7期
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doi: 10.20043/j.cnki.MPM.202509084
  • 接收时间:2025-09-08
  • 首发时间:2026-11-02
  • 出版时间:2026-04-10
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  • 收稿日期:2025-09-08
基金
国家自然科学基金资助项目(72004165; 72374156)
山东省高等学校“青创团队计划”团队研究课题(2022RW075)
作者信息
    1.山东第二医科大学公共卫生学院,山东 潍坊 261053
    2.“健康山东”重大社会风险预测与治理协同创新中心,山东 潍坊 261053
    3.山东第二医科大学康复健康研究院,山东 潍坊 261053
    4.山东第二医科大学管理学院,山东 潍坊 261053
    5.山东第二医科大学ICF研究院,山东 潍坊 261053

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2种不同金属材料的力学参数
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属数
Number of
genus
种数
Number of
species
占总种数比例
Percentage of
total species (%)
属
Genus
种数
Number of
species
占总种数比例
Percentage of total
species (%)
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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