Association Between Cigarette Smoking and SARS-CoV-2 Infection: Insights from Multivariable Regression and Mendelian Randomization in the Norwegian Mother, Father and Child Cohort Study - Summary - MDSpire
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Association Between Cigarette Smoking and SARS-CoV-2 Infection: Insights from Multivariable Regression and Mendelian Randomization in the Norwegian Mother, Father and Child Cohort Study
To investigate the association between smoking traits and risk of SARS-CoV-2 infection using standard multivariable regression and Mendelian randomization (MR) analyses, highlighting its significance for public health.
Key Findings:
Current smokers showed a lower risk of testing positive for SARS-CoV-2 infection compared to non-smokers in observational studies.
Mendelian randomization analyses indicated a positive association between genetically predicted smoking traits and confirmed SARS-CoV-2 infection.
Discrepancies between MR and observational studies may arise from biases in observational data or violations of MR assumptions, which could have significant implications for understanding smoking's health effects.
Interpretation:
The study highlights conflicting evidence regarding smoking's impact on SARS-CoV-2 infection risk, suggesting that genetic predisposition may reveal different associations than traditional observational methods, which is crucial for future research.
Limitations:
Potential biases from residual confounding in observational studies.
Possible violations of MR assumptions, including weak instruments and horizontal pleiotropy, which should be addressed in future studies.
Conclusion:
Understanding the causal relationship between smoking and COVID-19 outcomes is crucial for public health messaging, particularly in pandemic contexts, and could inform future strategies.
by Ida Henriette Caspersen, Álvaro Hernáez, Sebastián Peña, Ahmed Nabil Shaaban, Maria Christine Magnus, Sakari Karvonen, Maria Rosaria Galanti, Per Magnus
