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Association between midlife dementia risk factors and longitudinal brain atrophy: the PREVENT-Dementia study.
Journal of Neurology, Neurosurgery, and Psychiatry ( IF 11.0 ) Pub Date : 2019-12-05 , DOI: 10.1136/jnnp-2019-321652
John T O'Brien 1 , Michael J Firbank 2 , Karen Ritchie 3, 4 , Katie Wells 5 , Guy B Williams 6 , Craig W Ritchie 3 , Li Su 1
Affiliation  

BACKGROUND Increased rates of brain atrophy on serial MRI are frequently used as a surrogate marker of disease progression in Alzheimer's disease and other dementias. However, the extent to which they are associated with future risk of dementia in asymptomatic subjects is not clear. In this study, we investigated the relationship between the Cardiovascular Risk Factors, Aging, and Dementia (CAIDE) risk score and longitudinal atrophy in middle-aged subjects. MATERIALS AND METHODS A sample of 167 subjects (aged 40-59 at baseline) from the PREVENT-Dementia programme underwent MRI scans on two separate occasions (mean interval 735 days; SD 44 days). We measured longitudinal rates of brain atrophy using the FSL Siena toolbox. RESULTS Annual percentage rates of brain volume and ventricular volume change were greater in those with a high (>6) vs low CAIDE score-absolute brain volume percentage loss 0.17% (CI 0.07 to 0.27) and absolute ventricular enlargement 1.78% (CI 1.14 to 2.92) higher in the at risk group. Atrophy rates did not differ between subjects with and without a parental history of dementia, but were significantly correlated with age. Using linear regression, with covariates of age, sex and education, CAIDE score >6 was the only significant predictor of whole brain atrophy rates (p=0.025) while age (p=0.009), sex (p=0.002) and CAIDE>6 (p=0.017) all predicted ventricular expansion rate. CONCLUSION Our results show that progressive brain atrophy is associated with increased risk of future dementia in asymptomatic middle-aged subjects, two decades before dementia onset.

中文翻译:

中年痴呆症危险因素与纵向脑萎缩之间的关联:PREVENT-Dementia研究。

背景技术在系列MRI上脑萎缩的发生率经常被用作阿尔茨海默氏病和其他痴呆症中疾病进展的替代标志。但是,它们与无症状受试者未来痴呆风险的相关程度尚不清楚。在这项研究中,我们调查了中年受试者心血管危险因素,衰老和痴呆(CAIDE)危险评分与纵向萎缩之间的关系。材料和方法来自PREVENT-Dementia计划的167名受试者(基线年龄为40-59岁)的样本在两次单独的情况下(平均间隔735天;标准差为44天)接受了MRI扫描。我们使用FSL Siena工具箱测量了脑萎缩的纵向比率。结果那些具有高(>> 6)与低CAIDE评分相比,高风险组的绝对脑体积百分比损失高0.17%(CI为0.07至0.27)和绝对室扩大为1.78%(CI为1.14至2.92)。患有和没有父母的痴呆病史的受试者之间的萎缩率没有差异,但与年龄显着相关。使用线性回归以及年龄,性别和教育程度的协变量,CAIDE得分> 6是全脑萎缩率(p = 0.025)的唯一重要预测指标,而年龄(p = 0.009),性别(p = 0.002)和CAIDE> 6 (p = 0.017)所有预测的心室扩张率。结论我们的结果表明,进行性脑萎缩与无症状的中年人(痴呆症发作前二十年)将来患痴呆症的风险增加有关。27)和高风险组的绝对心室扩大高1.78%(CI 1.14至2.92)。患有和没有父母的痴呆病史的受试者之间的萎缩率没有差异,但与年龄显着相关。使用线性回归以及年龄,性别和教育程度的协变量,CAIDE得分> 6是全脑萎缩率(p = 0.025)的唯一重要预测指标,而年龄(p = 0.009),性别(p = 0.002)和CAIDE> 6 (p = 0.017)所有预测的心室扩张率。结论我们的结果表明,进行性脑萎缩与无症状的中年人(痴呆症发作前二十年)将来患痴呆症的风险增加有关。27)和高风险组的绝对心室扩大高1.78%(CI 1.14至2.92)。患有和没有父母的痴呆病史的受试者之间的萎缩率没有差异,但与年龄显着相关。使用线性回归以及年龄,性别和教育程度的协变量,CAIDE得分> 6是全脑萎缩率(p = 0.025)的唯一重要预测指标,而年龄(p = 0.009),性别(p = 0.002)和CAIDE> 6 (p = 0.017)所有预测的心室扩张率。结论我们的结果表明,进行性脑萎缩与无症状的中年人(痴呆症发作前二十年)将来患痴呆症的风险增加有关。但与年龄显着相关。使用线性回归以及年龄,性别和教育程度的协变量,CAIDE得分> 6是全脑萎缩率(p = 0.025)的唯一重要预测指标,而年龄(p = 0.009),性别(p = 0.002)和CAIDE> 6 (p = 0.017)所有预测的心室扩张率。结论我们的结果表明,进行性脑萎缩与无症状的中年人(痴呆症发作前二十年)将来患痴呆症的风险增加有关。但与年龄显着相关。使用线性回归以及年龄,性别和教育程度的协变量,CAIDE得分> 6是全脑萎缩率(p = 0.025)的唯一重要预测指标,而年龄(p = 0.009),性别(p = 0.002)和CAIDE> 6 (p = 0.017)所有预测的心室扩张率。结论我们的结果表明,进行性脑萎缩与无症状的中年人(痴呆症发作前二十年)将来患痴呆症的风险增加有关。
更新日期:2020-01-10
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