Differential vulnerability to neighbourhood disorder: a gene×environment interaction study

Area of Science:

• Public Health
• Genetics
• Environmental Health

Background:

• Type 2 diabetes (T2D) is a growing public health concern with significant morbidity and mortality.
• Neighborhood disorder is increasingly recognized as a risk factor for T2D development.
• Neighborhood disorder may interact with genetic predisposition to increase T2D risk.

Purpose of the Study:

• To investigate the independent and interactive effects of neighborhood disorder and genetic risk on T2D.
• To determine if neighborhood disorder exacerbates genetic susceptibility to T2D.

Main Methods:

• Utilized data from the Health and Retirement Study, including genetic, self-reported neighborhood, and health information.
• Employed weighted logistic regression analyses to assess the association between neighborhood disorder, T2D polygenic scores, and T2D incidence.
• Controlled for covariates such as education, age, gender, physical activity, and obesity.

Main Results:

• Both increased perceptions of neighborhood disorder (OR=1.11) and higher polygenic scores for T2D (OR=1.42) were independently associated with higher T2D risk.
• A significant gene×environment interaction was found, where neighborhood disorder exacerbated genetic risk for T2D (OR=1.10).
• These findings remained significant after adjusting for multiple potential confounders.

Conclusions:

• Minimizing exposure to neighborhood disorder (e.g., vandalism, vacant buildings, unsafe conditions) could reduce the T2D burden.
• Interventions targeting neighborhood environments may be particularly beneficial for individuals with a genetic liability for T2D.
• This study highlights the importance of social and environmental determinants in T2D prevention and management.