Approaches for strengthening causal inference regarding prenatal risk factors for childhood behavioural and...

Area of Science:

• Neuroscience
• Psychiatry
• Epidemiology

Background:

• Childhood behavioral and psychiatric diseases pose significant public health challenges.
• Identifying modifiable prenatal risk factors is crucial for disease prevention.
• Traditional epidemiological studies face limitations in establishing causality due to confounding factors.

Purpose of the Study:

• To review and highlight alternative epidemiological approaches for identifying causal risk factors in prenatal exposures.
• To provide researchers with a comprehensive overview of methods suitable for studying behavioral and psychiatric disorders.
• To specifically focus on Mendelian randomization as a novel approach.

Main Methods:

• Comparative analysis across different settings.
• Utilization of negative controls.
• Exploration of natural experiments, including migration studies, in vitro fertilization studies, and Mendelian randomization.

Main Results:

• The review illustrates the application of these alternative methods using examples of behavioral and psychiatric disorders.
• Mendelian randomization is presented as a promising, albeit novel, approach for causal inference.

Conclusions:

• Outlining these diverse methodologies enables researchers to select appropriate study designs for their specific research questions.
• The review details the concept, implementation, and limitations of Mendelian randomization, encouraging its consideration in future research.