Investigating the Potential Causal Relationship Between Thyroid Function and Carpal Tunnel Syndrome: A Two-Sample...

Area of Science:

• Endocrinology
• Neurology
• Genetics

Background:

• Research suggests a potential link between thyroid function and carpal tunnel syndrome (CTS).
• The causal relationship between thyroid dysfunction and CTS remains unclear.
• Investigating this association is crucial for understanding disease mechanisms.

Purpose of the Study:

• To investigate the potential causal relationship between various thyroid function markers and CTS.
• Utilizing a two-sample Mendelian randomization (MR) approach for robust genetic analysis.
• To clarify the complex interplay between thyroid health and carpal tunnel syndrome.

Main Methods:

• A two-sample MR analysis was performed using genome-wide association studies summary data.
• Investigated genetic causal links between hyperthyroidism, hypothyroidism, TSH, FT4, T3, and CTS.
• Employed inverse-variance weighted (IVW) method, supplemented by MR-Egger, weighted median, and weighted mode analyses, with comprehensive sensitivity analyses.

Main Results:

• No evidence of a causal effect of genetically predicted thyroid function on CTS was found using the IVW method (all P > 0.05).
• Robust genetic instrumental variables were identified for thyroid function markers.
• Findings remained consistent across sensitivity analyses, despite observed heterogeneity and pleiotropy in some associations.

Conclusions:

• The study did not establish a causal relationship between thyroid function and CTS.
• Further research is necessary to elucidate the intricate connection between thyroid disorders and carpal tunnel syndrome.
• This MR analysis provides valuable insights into the genetic underpinnings of CTS and thyroid function.