An extra X chromosome among adult women in the Million Veteran Program: A more benign perspective of trisomy X.

Journal: American journal of medical genetics. Part C, Seminars in medical genetics

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Affiliated Institutions:  Department of Pediatrics, University of Colorado School of Medicine, Aurora, Colorado, USA. VA Informatics and Computing Infrastructure (VINCI), VA Salt Lake City Healthcare System, Salt Lake City, Utah, USA. VA Boston Healthcare System, Boston, Massachusetts, USA. Medical Scientist Training Program, University of California San Diego, La Jolla, California, USA. Center for Behavioral Genetics of Aging, School of Medicine, University of California San Diego, La Jolla, California, USA. VA San Diego Healthcare System, San Diego, California, USA. Program in Medical and Population Genetics, Broad Institute of Harvard and MIT, Boston, Massachusetts, USA. Nemours Children's Hospital DE, Wilmington, Delaware, USA.

Abstract summary 

Despite affecting in 1 in every 1000 females, remarkably little is known about trisomy X syndrome (47,XXX), especially among older adults who are undiagnosed. In this study, we aimed to determine the prevalence of 47,XXX among females enrolled in the Million Veterans Program (MVP; mean age 50.2 ± 13.6 years), and compare broad health outcomes between females with 47,XXX and 46,XX matched controls. We identified 61 females with an additional X chromosome, corresponding to a prevalence of 103 per 100,000 females; 27.9% had been clinically diagnosed. Females with 47,XXX had taller stature (+6.1 cm, p < 0.001), greater rate of outpatient encounters (p = 0.026), higher odds of kidney disease (odds ratio [OR] = 12.3; 95% confidence interval [CI] 2.9-51.8), glaucoma (OR = 5.1; 95% CI 1.5-13.9), and congestive heart failure (OR = 5.6; 95% CI 1.4-24.2), and were more likely to be unemployed (p = 0.008) with lower annual income (p = 0.021) when compared with 46,XX controls of the same age and genetic ancestry. However, there were no differences in the rates of other encounter types, Charlson Comorbidity Index, all other medical and psychological diagnoses, military service history or quality of life metrics. In conclusion, in this aging and predominately undiagnosed sample, 47,XXX conferred few differences when compared with matched controls, offering a more reassuring perspective to the trisomy X literature.

Authors & Co-authors:  Davis Teerlink Lynch Klamut Gorman Pagadala Panizzon Merritt Genovese Ross Hauger

Study Outcome 

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Citations :  Berglund, A., Stochholm, K., & Gravholt, C. H. (2020). The epidemiology of sex chromosome abnormalities. American Journal Medical Genetics Part C: Seminars Medical Genetics, 184(2), 202-215. https://doi.org/10.1002/ajmg.c.31805
Authors :  11
Identifiers
Doi : 10.1002/ajmg.c.32083
SSN : 1552-4876
Study Population
Women,Females
Mesh Terms
Other Terms
Million Veteran Program;healthcare utilization;morbidity;sex chromosome aneuploidy;triple X syndrome
Study Design
Study Approach
Country of Study
Publication Country
United States