TY - JOUR T1 - Favourable Lifestyle Protects Cognitive Function in Older Adults With High Genetic Risk of Obesity: A Prospective Cohort Study. JF - Frontiers in Molecular Neuroscience Y1 - 2022 A1 - Liu, Huamin A1 - Wang, Zhenghe A1 - Zou, Lianwu A1 - Gu, Shanyuan A1 - Zhang, Minyi A1 - Hukportie, Daniel Nyarko A1 - Zheng, Jiazhen A1 - Zhou, Rui A1 - Yuan, Zelin A1 - Wu, Keyi A1 - Huang, Zhiwei A1 - Zhong, Qi A1 - Huang, Yining A1 - Wu, Xianbo KW - cognitive function KW - genetic risk KW - lifestyle KW - Obesity AB -

The relationship between body mass index (BMI) and cognitive impairment remains controversial, especially in older people. This study aims to confirm the association of phenotypic and genetic obesity with cognitive impairment and the benefits of adhering to a healthy lifestyle. This prospective study included 10,798 participants (aged ≥ 50 years) with normal cognitive function from the Health and Retirement Study in the United States. Participants were divided into low (lowest quintile), intermediate (quintiles 2-4), and high (highest quintile) groups according to their polygenic risk score (PRS) for BMI. The risk of cognitive impairment was estimated using Cox proportional hazard models. Higher PRS for BMI was associated with an increased risk, whereas phenotypic obesity was related to a decreased risk of cognitive impairment. Never smoking, moderate drinking, and active physical activity were considered favourable and associated with a lower risk of cognitive impairment compared with current smoking, never drinking, and inactive, respectively. A favourable lifestyle was associated with a low risk of cognitive impairment, even in subjects with low BMI and high PRS for BMI. This study suggest that regardless of obesity status, including phenotypic and genetic, adhering to a favourable lifestyle is beneficial to cognitive function.

VL - 15 ER -