Predictors and risk model development for menopausal age in fragile X premutation carriers

Area of Science:

• Genetics
• Reproductive Endocrinology
• Oncology

Background:

• Women with Fragile X mental retardation 1 (FMR1) premutation are at risk for Fragile X-associated primary ovarian insufficiency (FXPOI).
• Counseling regarding reduced fertility is crucial for these women.
• Factors influencing the onset and severity of FXPOI require further investigation.

Purpose of the Study:

• To assess the predictive power of various factors on menopausal age in FMR1 premutation carriers.
• To identify key predictors for the onset of FXPOI.
• To develop a model for predicting menopausal age in this population.

Main Methods:

• Cox proportional hazard models were used to analyze genetic, environmental, and reproductive factors.
• 1068 women from Nijmegen and Atlanta studies were included.
• Analysis focused on 385 women from fragile X families and 683 from fragile X or general population families.

Main Results:

• CGG repeat size (HR, 1.43) and smoking (HR, 1.34) were the strongest predictors of menopausal age.
• A prediction model incorporating these factors, relative's menopausal age, and ascertainment site was developed.
• The model estimated postmenopausal probability for carriers with 7-10% margin of error.

Conclusions:

• The developed prediction model is a significant step towards clinical application for FXPOI.
• This model can aid in counseling women carrying the FMR1 premutation.
• Further refinement of the model may improve prediction accuracy for FXPOI onset.