背景:大脑体积与晚年的认知能力下降有关,皮质脑萎缩超过正常范围与晚年的认知和行为结果较差有关。
目的:为了调查认知能力下降的可能性,轻度认知障碍(MCI),或者痴呆症,当参与者磁共振成像(MRI)中存在区域萎缩时。
方法:利用2,545名成年人的多中心MRI数据,使用NeurosphetAQUA测量区域体积。四个叶(额叶,顶叶,temporal,和枕骨),四个阿尔茨海默病相关区域(内嗅,梭形,颞下,和中颞区),并对左右半球的海马体进行了测量和分析。与年龄和性别匹配的认知正常人群相比,来自脑MRI的区域萎缩的存在定义为≤1.5标准偏差(SD)。与没有区域性萎缩的参与者相比,研究了具有区域性萎缩的参与者的认知能力下降的风险比。
结果:当存在海马萎缩时,认知能力下降的风险比明显更高(MCI,1.84,p<0.001;痴呆,4.17,p<0.001)。此外,多个区域关节萎缩的参与者表现出更高的痴呆风险比,例如,9.6风险比(95%置信区间,8.0-11.5),在额叶发现萎缩,temporal,海马灰质,比那些没有萎缩的。
结论:我们的研究表明,与年龄和性别相匹配的没有萎缩的人群相比,患有多个区域萎缩(肺叶或AD特异性区域)的个体患痴呆的可能性更高。因此,在评估MRI发现时需要进一步考虑.
Brain volume is associated with cognitive decline in later life, and cortical brain atrophy exceeding the normal range is related to inferior cognitive and behavioral outcomes in later life.
To investigate the likelihood of cognitive decline, mild cognitive impairment (MCI), or dementia, when regional atrophy is present in participants\' magnetic resonance imaging (MRI).
Multi-center MRI data of 2,545 adults were utilized to measure regional volumes using NEUROPHET AQUA. Four lobes (frontal, parietal, temporal, and occipital), four Alzheimer\'s disease-related regions (entorhinal, fusiform, inferior temporal, and middle temporal area), and the hippocampus in the left and right hemispheres were measured and analyzed. The presence of regional atrophy from brain MRI was defined as ≤1.5 standard deviation (SD) compared to the age- and sex-matched cognitively normal population. The risk ratio for cognitive decline was investigated for participants with regional atrophy in contrast to those without regional atrophy.
The risk ratio for cognitive decline was significantly higher when hippocampal atrophy was present (MCI, 1.84, p < 0.001; dementia, 4.17, p < 0.001). Additionally, participants with joint atrophy in multiple regions showed a higher risk ratio for dementia, e.g., 9.6 risk ratio (95% confidence interval, 8.0-11.5), with atrophy identified in the frontal, temporal, and hippocampal gray matter, than those without atrophy.
Our study showed that individuals with multiple regional atrophy (either lobar or AD-specific regions) have a higher likelihood of developing dementia compared to the age- and sex-matched population without atrophy. Thus, further consideration is needed when assessing MRI findings.