A Disease Modification Effect of APOEE4 on the Association between Urinary Albumin Excretion and Cognition in Korean Adults
Background. No previous study examined a disease modifying effect of APOEE4 status on the association between the urinary albumin-to-creatinine ratio (UACR) and cognition. This study aimed to investigate whether APOEE4 modified the association in Korean adults.Methods. We performed a cross-sectional study in adults aged 45 to 74 who were living in Namwon City, Republic of Korea. Cognitive function was measured with the Korean version of modified Mini-Mental State Examination (K-mMMSE) and cognitive impairment was defined as scores falling below the 25th percentile of the K-mMMSE according to age, sex, and educational attainments.Results. A total of 10,190 participants (4006 men and 6184 women) were analyzed in the present study. Of these, 1698 subjects (16.7%) were APOEE4 carriers. The UACR values were negatively associated with the K-mMMSE scores, even after adjusting for potential confounders including age, sex, education, and vascular risk factors. APOEE4 modified the association significantly, resulting in a steeper decline of cognitive function with the increase in UACR inE4 carriers (Pfor interaction = 0.021).Conclusion. Higher UACR values were significantly associated with cognitive dysfunction in the general Korean population, with cognition in APOEE4 carriers being more severely affected by increased UACR.