Impact of periventricular hyperintensities and cystatin C on different cognitive domains in the population of non-demented elderly Chinese.

OBJECTIVES

To investigate the impact of periventricular hyperintensities and serum cystatin C on mild cognitive impairment to provide a basis for the investigation of the pathogenesis.

METHOD

286 patients enrolled the study and underwent an examination in Shanghai Fifth People's Hospital from June 2017 to June 2018. The participants' cognitive function was evaluated by different cognitive domains using of mini-mental state examination (MMSE), Montreal cognitive assessment (MoCA), auditory verbal learning test, Huashan version (AVLT-H), digit span test (DST), symbol digit modalities test (SDMT), trail making test (TMT) and verbal fluency test (VFT). We measured the levels of serum cystatin C at the department of clinical laboratory in Shanghai Fifth People's Hospital and each subject took an MRI examination in the Department of Radiology of Shanghai Fifth People's Hospital. Multivariate linear regression analyses were used to assess the relationship of cognitive score and the level of cystatin C and periventricular hyperintensities severity. All statistical analyses were performed using the SPSS system.

RESULTS

Among 286 eligible participants, 203 (71.0%) were enrolled to further analysis, including 69 male and 134 female (Mean age 67.93 ± 6.19 years). Significant predictors of severe periventricular hyperintensities (PVH) were older age and hypertension. Significant predictors of severe deep white matter hyperintensities (DWMH) were older age only. PVH severity was independently associated with mild cognitive impairment and that the primary impairment was executive function and processing speed. DWMH had no significant effect on cognitive function. Cystatin C only affected the overall cognitive level, and the relationship with WMH severity was not significant.

CONCLUSIONS

We demonstrated that in the chinese non-demented elderly, the severity of PVH was independent and significant associated with mild cognitive impairment and that the primary impairment was executive capacity and processing speed, while cystatin C may be an independent risk factor for overall cognitive impairment.