12 results on '"Alexander Allen"'
Search Results
2. Case-Control Study of Paresthesia Among World Trade Center-Exposed Community Members
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Alexander Allen, Marc Wilkenfeld, Aaron I. Vinik, Michael Marmor, Joan Reibman, Yongzhao Shao, Sujata Thawani, Maria Luisa Cotrina, Mark M. Stecker, Ericka S Wong, Etta J. Vinik, and Bin Wang
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Adult ,Male ,Pediatrics ,medicine.medical_specialty ,Nerve fiber ,Disease ,complex mixtures ,Article ,Disasters ,03 medical and health sciences ,0302 clinical medicine ,Risk Factors ,Occupational Exposure ,Humans ,Medicine ,Paresthesia ,business.industry ,Public Health, Environmental and Occupational Health ,World trade center ,Case-control study ,Dust ,Middle Aged ,030210 environmental & occupational health ,humanities ,medicine.anatomical_structure ,Case-Control Studies ,Neurologic abnormalities ,Etiology ,Female ,New York City ,September 11 Terrorist Attacks ,business ,Sensory nerve - Abstract
Objective To investigate whether paresthesia of the lower extremities following exposure to the World Trade Center (WTC) disaster was associated with signs of neuropathy, metabolic abnormalities, or neurotoxin exposures. Methods Case-control study comparing WTC-exposed paresthesia cases with "clinic controls" (WTC-exposed subjects without paresthesias), and "community controls" (WTC-unexposed persons). Results Neurological histories and examination findings were significantly worse in cases than controls. Intraepidermal nerve fiber densities were below normal in 47% of cases and sural to radial sensory nerve amplitude ratios were less than 0.4 in 29.4%. Neurologic abnormalities were uncommon among WTC-unexposed community controls. Metabolic conditions and neurotoxin exposures did not differ among groups. Conclusions Paresthesias among WTC-exposed individuals were associated with signs of neuropathy, small and large fiber disease. The data support WTC-related exposures as risk factors for neuropathy, and do not support non-WTC etiologies.
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- 2020
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3. Ensuring high standards of British Society for Rheumatology clinical guidelines: reflections from the coalface
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Ian Giles, Sarah L. Mackie, Alexander Allen, and Elizabeth MacPhie
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Medical education ,medicine.medical_specialty ,Information Dissemination ,business.industry ,United Kingdom ,Rheumatology ,Internal medicine ,Practice Guidelines as Topic ,medicine ,Humans ,Pharmacology (medical) ,Policy Making ,business ,Societies, Medical - Published
- 2021
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4. Cross-sectional observational study of epidemiology of COVID-19 and clinical outcomes of hospitalised patients in North West London during March and April 2020
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Paula Blomquist, Ashley Whittington, Miriam Harris, Alastair McGregor, Padmasayee Papineni, Guduru Gopal Rao, Alexander Allen, Liyang Wang, Laurence John, Stephen Hiles, Valerie Decraene, Bharat Patel, Yimmy Chow, Martin Kuper, Sharpe Roger, Cohen David, Tennant Rachel, Vaid Nidhi, Sahnan Kapil, Gross Jamie, Husain Tariq, Parris Victoria, Sandhu Gurjinder, Rosen Stuart, Cayley Charles, Patel Sangita, Blair Mitchel, Lewis Simon, Chita Sunder, Winn Trish, Biggin-Lamming James, Sewel Catherine, Gregory Laila, Tozer Philip, and Littler Stephen
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Adult ,Male ,medicine.medical_specialty ,Adolescent ,Cross-sectional study ,Epidemiology ,Ethnic group ,030204 cardiovascular system & hematology ,law.invention ,Cohort Studies ,03 medical and health sciences ,Young Adult ,0302 clinical medicine ,law ,Risk Factors ,London ,Medicine ,Humans ,030212 general & internal medicine ,Young adult ,Child ,Aged ,Aged, 80 and over ,business.industry ,Public health ,public health ,Infant, Newborn ,COVID-19 ,Infant ,General Medicine ,Middle Aged ,Intensive care unit ,Respiration, Artificial ,Hospitalization ,Intensive Care Units ,Cross-Sectional Studies ,Family medicine ,Child, Preschool ,Observational study ,Female ,business ,Cohort study - Abstract
ObjectiveThe aim of this paper is to describe evolution, epidemiology and clinical outcomes of COVID-19 in subjects tested at or admitted to hospitals in North West London.DesignObservational cohort study.SettingLondon North West Healthcare NHS Trust (LNWH).ParticipantsPatients tested and/or admitted for COVID-19 at LNWH during March and April 2020Main outcome measuresDescriptive and analytical epidemiology of demographic and clinical outcomes (intensive care unit (ICU) admission, mechanical ventilation and mortality) of those who tested positive for COVID-19.ResultsThe outbreak began in the first week of March 2020 and reached a peak by the end of March and first week of April. In the study period, 6183 tests were performed in on 4981 people. Of the 2086 laboratory confirmed COVID-19 cases, 1901 were admitted to hospital. Older age group, men and those of black or Asian minority ethnic (BAME) group were predominantly affected (pConclusionThe findings confirm that men, BAME and older population were most commonly and severely affected groups. Only older age was independently associated with mortality.
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- 2021
5. Intimal sarcoma of the pulmonary artery treated with neoadjuvant radiation prior to pulmonary artery resection and reconstruction
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Steven C. Smith, Timothy Harris, Anthony D. Cassano, Benjamin Medalion, Alexander Allen, Sosipatros A. Boikos, John D. Grizzard, and Raghavendra Pillappa
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Pulmonary and Respiratory Medicine ,medicine.medical_specialty ,medicine.medical_treatment ,Case Report ,Endarterectomy ,Malignancy ,Diseases of the respiratory system ,Intimal sarcoma ,medicine.artery ,medicine ,Radiation ,RC705-779 ,business.industry ,medicine.disease ,Gemcitabine ,Radiation therapy ,Pulmonary artery ,Docetaxel ,Great vessels ,Radiology ,Neoadjuvant ,business ,medicine.drug - Abstract
Intimal sarcoma (IS) is a rare malignancy arising in the great vessels or heart, most commonly in the pulmonary artery, primarily treated with surgical intervention. We report a case of IS of the pulmonary artery diagnosed after an endarterectomy to remove a suspected pulmonary embolism. The tumor could not be entirely resected and showed interval growth at post-operative follow up. Neoadjuvant radiotherapy was then delivered to improve resectability. Imaging confirmed decreased tumor size, and a surgical resection with pulmonary artery reconstruction and right upper lobectomy was then successfully performed. Adjuvant gemcitabine and docetaxel was later initiated. Four months post-operatively, the patient is alive without disease recurrence. While prior reports in the literature document use of adjuvant chemotherapy and radiotherapy for treatment of IS of the pulmonary artery, no prior experience has documented utility of neoadjuvant radiotherapy for improvement of resectability. Our experience suggests that neoadjuvant radiation should be considered to improve resectability in cases of borderline resectable IS of the pulmonary artery.
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- 2021
6. Treatment of psoriatic arthritis with biologic and targeted synthetic DMARDs: British Society for Rheumatology guideline scope
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Laura C Coates, Philip S. Helliwell, Laura J. Tucker, William Tillett, Neil McHugh, David Chandler, Stuart Kyle, Andrew Parkinson, Vishnu Madhok, Andrew D. Dick, Gareth T. Jones, Nicola J. Gullick, Stefan Siebert, Catherine H. Smith, Charlotte Davis, Coziana Ciurtin, Deepak R. Jadon, Alexander Allen, A.C. Foulkes, Tim Raine, Jadon, Deepak [0000-0003-0600-4566], and Apollo - University of Cambridge Repository
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medicine.medical_specialty ,Evidence-based practice ,Nice ,Dactylitis ,Psoriatic arthritis ,Rheumatology ,Medicine ,Humans ,Pharmacology (medical) ,Intensive care medicine ,Accreditation ,computer.programming_language ,Protocol (science) ,Biological Products ,business.industry ,bDMARDs targeted ,Arthritis, Psoriatic ,Enthesitis ,Guideline ,medicine.disease ,Treatment Outcome ,tsDMARDs guideline management ,Antirheumatic Agents ,psoriatic_arthritis treatment biologics ,medicine.symptom ,business ,computer - Abstract
The aim of this guideline is to provide an update on evidence-based recommendations for treatment of adult patients with PsA. The previous BSR guidelines for PsA were published in 2012 and since that time, there have been many new advanced therapies licensed for PsA. This update will provide practical guidance for clinicians on the optimal selection of advanced therapies taking into account different domains of PsA (arthritis, enthesitis, dactylitis, axial disease and psoriasis) and key associated comorbidities. It will also update guidance on treatment strategy including the use of a treat-to-target approach. The guideline will be developed using the methods and processes outlined in Creating Clinical Guidelines: Our Protocol. (1) This development process to produce guidance, advice and recommendations for practice has National Institute for Health and Care Excellence (NICE) accreditation.
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- 2020
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7. Large Subcortical Intracerebral Hemorrhage Because of Reversible Cerebral Vasoconstriction Syndrome
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Paul P. Huang, Eytan Raz, Alexander Allen, and Sara K. Rostanski
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Adult ,Male ,medicine.medical_specialty ,Computed Tomography Angiography ,Nausea ,Migraine Disorders ,Vasodilator Agents ,Risk Factors ,Internal medicine ,medicine ,Humans ,Vasospasm, Intracranial ,Depression (differential diagnoses) ,Cerebral Hemorrhage ,Advanced and Specialized Nursing ,Intracerebral hemorrhage ,business.industry ,medicine.disease ,Reversible cerebral vasoconstriction syndrome ,Cerebral Angiography ,Blood pressure ,Cardiology ,Marijuana Use ,Nimodipine ,Neurology (clinical) ,medicine.symptom ,Cardiology and Cardiovascular Medicine ,business ,Aneurysm, False - Published
- 2020
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8. Abstract WP128: Stroke Subtype Predicts Neurological Deterioration After Intravenous Alteplase for Acute Ischemic Stroke
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Katarina Dakay, Aaron Lord, Andrew D Chang, Alexander Allen, Ryan A McTaggart, Mahesh V Jayaraman, Karen L. Furie, Brittany A Ricci, Shadi Yaghi, Shawna Cutting, Tina Burton, and Brian Mac Grory
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Advanced and Specialized Nursing ,medicine.medical_specialty ,business.industry ,Internal medicine ,medicine ,Cardiology ,Neurology (clinical) ,Stroke subtype ,Cardiology and Cardiovascular Medicine ,business ,Acute ischemic stroke - Abstract
Introduction: Intravenous alteplase improves functional outcome in patients with acute ischemic stroke. While patients often have better outcomes, other patients may experience recurrent or worsening symptoms. We sought to determine the association between stroke subtype and neurologic deterioration in this study cohort. Methods: Data were abstracted from a prospective quality improvement registry at a comprehensive stroke center. Patients with symptomatic intracranial hemorrhage, no follow-up imaging, code status change to comfort measures only in the first 24 hours, or stroke mimics were excluded. Recurrent cerebrovascular events (RCVE) were defined as any new or worsening symptoms due to cerebral ischemia in the absence of intracranial hemorrhage or an alternative etiology such as infection or seizure. We compared demographic factors, vascular comorbidities, admission blood pressure, medications, use and timing of antithrombotics during hospitalization, admission NIH stroke scale, endovascular intervention, stroke subtype [Cardioembolic, large artery atherosclerosis, small vessel disease, cryptogenic, and other defined (such as dissection, hypercoagulability, cancer related, illicit drug use)], and good 90-day outcome (mRS 0-1) between the two groups using Fisher’s exact test and t-test as indicated. We then performed multivariable logistic regression analyses to determine associations between stroke subtypes and RCVE. Results: We identified 705 patients treated with tPA, and 606 met the inclusion criteria. The rate of RCVE was 5.8% (35/606). In multivariable analyses, when compared to cardioembolic/cryptogenic stroke, RCVE was more common in small vessel disease (adjusted OR 9.51 p=0.029), large vessel disease (adjusted OR 5.60, p=0.033), and other stroke mechanisms (adjusted OR 11.29, p=0.019). RCVE was associated with more disability at 90 days when compared to non-RCVE (median mRS 4, IQR 3 vs. median mRS 3, IQR 2, p = 0.016). Conclusions: Non-cryptogenic/Non-cardioembolic stroke subtypes are associated with early RCVE, and RCVE is associated with long term disability. Studies are needed to confirm our findings and test interventions optimizing stroke prevention strategies in these subtypes.
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- 2020
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9. Autoimmune glial fibrillary acidic protein astrocytopathy resulting in treatment-refractory flaccid paralysis
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Shivam Gulhar, Ramin Haidari, Alexander Allen, Jonathan Bekenstein, Unsong Oh, Juan Pablo Pauta Martinez, Robert J. DeLorenzo, and Yang Tang
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Pathology ,medicine.medical_specialty ,Flaccid paralysis ,Nerve root ,Encephalomyelitis ,macromolecular substances ,Neurological disorder ,03 medical and health sciences ,0302 clinical medicine ,Medicine ,030212 general & internal medicine ,Denervation ,Glial fibrillary acidic protein ,biology ,business.industry ,Multiple sclerosis ,Meningoencephalitis ,General Medicine ,medicine.disease ,nervous system ,Neurology ,biology.protein ,Neurology (clinical) ,medicine.symptom ,business ,030217 neurology & neurosurgery - Abstract
Autoimmune glial fibrillary acidic protein (GFAP) astrocytopathy is an autoimmune neurological disorder associated with the presence of anti-GFAP IgG. Meningoencephalitis is the predominant clinical presentation of autoimmune GFAP astrocytopathy in published case series. We report a case of autoimmune GFAP astrocytopathy with the unusual feature of radiculoneuritis in addition to encephalomyelitis, resulting in flaccid paralysis unresponsive to immunotherapy. Imaging data confirmed involvement of brain, spinal cord and nerve roots. Electrodiagnostic testing showed changes consistent with a severe sensorimotor neuropathy with active denervation. The results of this case suggest the need for future studies to assess the impact of peripheral nerve involvement on the outcome of autoimmune GFAP astrocytopathy.
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- 2019
10. A multi-stage genome-wide association study of uterine fibroids in African Americans
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Dan M. Roden, Scott P. Dickinson, Janina M. Jeff, Nicholas Mancuso, Arti Tandon, Jacklyn N. Hellwege, Cynthia C. Morton, C. Scott Gallagher, David A. Hinds, Hae Kyung Im, Bogdan Pasaniuc, Lynn Rosenberg, Todd L. Edwards, David Reich, Elizabeth A. Stewart, Alexander Allen, Digna R. Velez Edwards, Nadin Rohland, Edward A. Ruiz-Narváez, Katherine E Hartmann, Eric S. Torstenson, Joshua C. Denny, Julie R. Palmer, Eimear E. Kenny, Sarah F. Jones, Melissa Wellons, and Lauren A. Wise
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0301 basic medicine ,Adult ,medicine.medical_specialty ,Uterine fibroids ,medicine.medical_treatment ,Genome-wide association study ,Biology ,Logistic regression ,Paediatrics and Reproductive Medicine ,03 medical and health sciences ,0302 clinical medicine ,Gene Frequency ,Complementary and Alternative Medicine ,Risk Factors ,Internal medicine ,medicine ,Genetics ,Humans ,Guanine Nucleotide Exchange Factors ,1000 Genomes Project ,Genetics (clinical) ,Alleles ,Original Investigation ,Genetic association ,African Americans ,Genetics & Heredity ,Neoplastic ,030219 obstetrics & reproductive medicine ,Hysterectomy ,Leiomyoma ,Obstetrics ,Middle Aged ,medicine.disease ,Confidence interval ,female genital diseases and pregnancy complications ,3. Good health ,Neoplasm Proteins ,Menopause ,030104 developmental biology ,Endocrinology ,Gene Expression Regulation ,Genetic Loci ,Uterine Neoplasms ,Female ,Cell Adhesion Molecules ,Genome-Wide Association Study - Abstract
Uterine fibroids are benign tumors of the uterus affecting up to 77% of women by menopause. They are the leading indication for hysterectomy, and account for $34 billion annually in the United States. Race/ethnicity and age are the strongest known risk factors. African American (AA) women have higher prevalence, earlier onset, and larger and more numerous fibroids than European American women. We conducted a multi-stage genome-wide association study (GWAS) of fibroid risk among AA women followed by in silico genetically predicted gene expression profiling of top hits. In Stage 1, cases and controls were confirmed by pelvic imaging, genotyped and imputed to 1000 Genomes. Stage 2 used self-reported fibroid and GWAS data from 23andMe, Inc. and the Black Women’s Health Study. Associations with fibroid risk were modeled using logistic regression adjusted for principal components, followed by meta-analysis of results. We observed a significant association among 3399 AA cases and 4764 AA controls at rs739187 (risk-allele frequency = 0.27) in CYTH4 (OR (95% confidence interval) = 1.23 (1.16–1.30), p value = 7.82 × 10−9). Evaluation of the genetic association results with MetaXcan identified lower predicted gene expression of CYTH4 in thyroid tissue as significantly associated with fibroid risk (p value = 5.86 × 10−8). In this first multi-stage GWAS for fibroids among AA women, we identified a novel risk locus for fibroids within CYTH4 that impacts gene expression in thyroid and has potential biological relevance for fibroids.
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- 2017
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11. Impact of Neurological Follow-Up on Early Hospital Readmission Rates for Acute Ischemic Stroke
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Ruth Linde, Richard Tangel, Ellen Deibert, Todd F. Barron, Ashley Mo, Rodney Grim, John Mingle, and Alexander Allen
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medicine.medical_specialty ,Hospital readmission ,Neurology ,business.industry ,Original Articles ,030204 cardiovascular system & hematology ,Stroke care ,medicine.disease ,03 medical and health sciences ,0302 clinical medicine ,Continuous use ,Diabetes mellitus ,Ischemic stroke ,Medicine ,Neurology (clinical) ,business ,Intensive care medicine ,Stroke ,Acute ischemic stroke ,030217 neurology & neurosurgery - Abstract
Introduction: Despite advances in stroke care, readmission rates for patients with ischemic stroke remain high. Although factors such as age, diabetes, and continuous use of antiplatelet agents have been found to predict readmission rates, the impact of after-hospital care has not been examined. Methods: The present study reviewed the charts of 416 patients with acute ischemic stroke and recorded stroke-related comorbidities, neurology follow-up within 21 days, readmission at 0 to 30 days, readmission at 31 to 90 days, and any reasons for readmission. Results: For those readmitted within 0 to 30 days, reasons for readmission were other medical conditions (62.5%), recurrent stroke (30.4%), and elective procedure (7.1%). For those readmitted within 31 to 90 days, reasons for readmission were other medical conditions (62.3%), recurrent stroke (15.1%), and elective procedure (22.6%). There was no significant relationship between being evaluated within 21 days and readmission at 0 to 30 or 31 to 90 days. However, those who did have a neurology follow-up at any point in time had a lower readmission rate of 10.6% compared to those who never came back (19.2%, P = .017). Patients with coronary artery disease and diabetes had a significantly higher likelihood of readmission within 0 to 30 days. Conclusion: The present study suggests that neurology follow-up at any point in time for patients with acute ischemic stroke may reduce short-term readmissions, but special attention to optimizing management of other underlying medical conditions, coronary artery disease, or diabetes may also help reduce overall readmissions. Patients with stroke, therefore, may benefit from a follow-up with both the primary care and neurology in a coordinated fashion to prevent early readmissions at 30 days.
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- 2017
12. Erratum to: A multi-stage genome-wide association study of uterine fibroids in African Americans
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Scott P. Dickinson, Julie R. Palmer, Nicholas Mancuso, Todd L. Edwards, Joshua C. Denny, C. Scott Gallagher, Katherine E Hartmann, Eimear E. Kenny, Dan M. Roden, Lauren A. Wise, Lynn Rosenberg, Eric S. Torstenson, Elizabeth A. Stewart, Arti Tandon, Janina M. Jeff, Alexander Allen, Digna R. Velez Edwards, Cynthia C. Morton, Melissa Wellons, Sarah F. Jones, David Reich, Edward A. Ruiz-Narváez, Jacklyn N. Hellwege, David A. Hinds, Hae Kyung Im, Bogdan Pasaniuc, and Nadin Rohland
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Adult ,medicine.medical_specialty ,Uterine fibroids ,Genome-wide association study ,Biology ,Paediatrics and Reproductive Medicine ,Complementary and Alternative Medicine ,Gene Frequency ,Risk Factors ,Genetics ,medicine ,Guanine Nucleotide Exchange Factors ,Humans ,Genetics (clinical) ,Alleles ,Genetics & Heredity ,Leiomyoma ,Middle Aged ,medicine.disease ,Human genetics ,Neoplasm Proteins ,Multi stage ,Black or African American ,Gene Expression Regulation, Neoplastic ,Genetic Loci ,Family medicine ,Uterine Neoplasms ,Female ,Erratum ,Cell Adhesion Molecules ,Genome-Wide Association Study - Abstract
Uterine fibroids are benign tumors of the uterus affecting up to 77% of women by menopause. They are the leading indication for hysterectomy, and account for $34 billion annually in the United States. Race/ethnicity and age are the strongest known risk factors. African American (AA) women have higher prevalence, earlier onset, and larger and more numerous fibroids than European American women. We conducted a multi-stage genome-wide association study (GWAS) of fibroid risk among AA women followed by in silico genetically predicted gene expression profiling of top hits. In Stage 1, cases and controls were confirmed by pelvic imaging, genotyped and imputed to 1000 Genomes. Stage 2 used self-reported fibroid and GWAS data from 23andMe, Inc. and the Black Women's Health Study. Associations with fibroid risk were modeled using logistic regression adjusted for principal components, followed by meta-analysis of results. We observed a significant association among 3399 AA cases and 4764 AA controls at rs739187 (risk-allele frequency = 0.27) in CYTH4 (OR (95% confidence interval) = 1.23 (1.16-1.30), p value = 7.82 × 10
- Published
- 2017
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