[A Mendelian randomization study on the relationship between insomnia and osteoporosis]

Area of Science:

• Genetics and Bone Health
• Sleep Medicine and Public Health

Background:

• Osteoporosis is a significant global health concern characterized by reduced bone density and increased fracture risk.
• Insomnia, a prevalent sleep disorder, has been anecdotally linked to various health issues, but its direct causal impact on bone health remains unclear.

Purpose of the Study:

• To investigate the potential causal relationship between insomnia and the risk of developing osteoporosis using a robust genetic approach.

Main Methods:

• Employed Mendelian randomization (MR) analysis, a genetic epidemiological method, to assess causality.
• Utilized single nucleotide polymorphisms (SNPs) associated with insomnia as instrumental variables.
• Applied multiple statistical methods including Inverse Variance Weighted (IVW), MR-Egger regression, and MR-PRESSO for robust analysis and sensitivity testing.

Main Results:

• Mendelian randomization analysis, particularly the IVW method, indicated a statistically significant association between insomnia and an increased risk of osteoporosis (OR=1.007, P=0.044).
• Extensive sensitivity analyses, including MR-Egger regression and MR-PRESSO, confirmed the robustness of the findings, ruling out significant pleiotropy and outliers.

Conclusions:

• The study provides strong genetic evidence supporting a causal link where insomnia increases the risk of osteoporosis.
• Findings underscore the importance of addressing sleep disturbances for bone health management and osteoporosis prevention strategies.