Arthritis development in patients with arthralgia is strongly associated with anti-citrullinated protein antibody status: a prospective cohort study

BackgroundAnti-citrullinated protein antibodies (ACPA) are associated with increased risk for rheumatoid arthritis.ObjectiveTo investigate the effect of the presence and levels of ACPA on arthritis development in patients with arthralgia.MethodsPatients with arthralgia positive for ACPA or IgM rheumatoid factor (IgM-RF) were tested for the shared epitope (SE) and were prospectively followed up for at least 12 months. Absence of clinical arthritis at inclusion and arthritis development during follow-up were independently confirmed by two investigators. Cox regression hazard analyses were used to calculate hazard ratios (HRs) for arthritis development.Results147 patients with arthralgia were included (50 ACPA positive, 52 IgM-RF positive and 45 positive for both antibodies). After a median follow-up of 28 months (interquartile range (IQR) 19–39), 29 patients developed arthritis in a median of 4 (IQR 3–6) joints and 26 (90%) of these were ACPA positive. The presence of ACPA (HR = 6.0; 95% confidence interval (95% CI) 1.8 to 19.8; p = 0.004), but not of IgM-RF (HR = 1.4, 95% CI 0.6 to 3.1) nor the SE (HR = 1.5, 95% CI 0.7 to 3.0), was associated with arthritis development. Within the group of ACPA-positive patients, the risk for arthritis was enhanced by the presence of IgM-RF (HR = 3.0; 95% CI 1.4 to 6.9; p = 0.01) and high ACPA levels (HR = 1.7; 95% CI 1.1 to 2.5; p = 0.008), but not the SE (HR = 1.0; 95% CI 0.5 to 2.1; p = 1.0).ConclusionIn patients with arthralgia the presence of ACPA (but not of IgM-RF or SE) predicts arthritis development. The risk in ACPA-positive patients may be further increased by the concomitant presence of IgM-RF or high levels of ACPA.

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Headache as a risk factor for dementia: A prospective population-based study

Cephalalgia ◽

10.1177/0333102413513181 ◽

2013 ◽

Vol 34 (5) ◽

pp. 327-335 ◽

Cited By ~ 22

Author(s):

Knut Hagen ◽

Eystein Stordal ◽

Mattias Linde ◽

Timothy J Steiner ◽

John-Anker Zwart ◽

...

Keyword(s):

Risk Factor ◽

Cohort Study ◽

Cox Regression ◽

Subsequent Development ◽

Population Based ◽

Health Study ◽

Cox Regression Analysis ◽

Hazard Ratios ◽

Increased Risk

Background Headache has not been established as a risk factor for dementia. The aim of this study was to determine whether any headache was associated with subsequent development of vascular dementia (VaD), Alzheimer’s disease (AD) or other types of dementia. Methods This prospective population-based cohort study used baseline data from the Nord-Trøndelag Health Study (HUNT 2) performed during 1995–1997 and, from the same Norwegian county, a register of cases diagnosed with dementia during 1997–2010. Participants aged ≥20 years who responded to headache questions in HUNT 2 were categorized (headache free; with any headache; with migraine; with nonmigrainous headache). Hazard ratios (HRs) for later inclusion in the dementia register were estimated using Cox regression analysis. Results Of 51,383 participants providing headache data in HUNT 2, 378 appeared in the dementia register during the follow-up period. Compared to those who were headache free, participants with any headache had increased risk of VaD ( n = 63) (multivariate-adjusted HR = 2.3, 95% CI 1.4–3.8, p = 0.002) and of mixed dementia (VaD and AD ( n = 52)) (adjusted HR = 2.0, 95% CI 1.1–3.5, p = 0.018). There was no association between any headache and later development of AD ( n = 180). Conclusion In this prospective population-based cohort study, any headache was a risk factor for development of VaD.

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SARS-CoV-2 vaccination and myocarditis or myopericarditis: population based cohort study

BMJ ◽

10.1136/bmj-2021-068665 ◽

2021 ◽

pp. e068665

Author(s):

Anders Husby ◽

Jørgen Vinsløv Hansen ◽

Emil Fosbøl ◽

Emilia Myrup Thiesson ◽

Morten Madsen ◽

...

Keyword(s):

Cohort Study ◽

Confidence Interval ◽

Population Based ◽

Hazard Ratio ◽

Adjusted Hazard Ratio ◽

Absolute Rate ◽

Hazard Ratios ◽

Increased Risk ◽

The Absolute

AbstractObjectiveTo investigate the association between SARS-CoV-2 vaccination and myocarditis or myopericarditis.DesignPopulation based cohort study.SettingDenmark.Participants4 931 775 individuals aged 12 years or older, followed from 1 October 2020 to 5 October 2021.Main outcome measuresThe primary outcome, myocarditis or myopericarditis, was defined as a combination of a hospital diagnosis of myocarditis or pericarditis, increased troponin levels, and a hospital stay lasting more than 24 hours. Follow-up time before vaccination was compared with follow-up time 0-28 days from the day of vaccination for both first and second doses, using Cox proportional hazards regression with age as an underlying timescale to estimate hazard ratios adjusted for sex, comorbidities, and other potential confounders.ResultsDuring follow-up, 269 participants developed myocarditis or myopericarditis, of whom 108 (40%) were 12-39 years old and 196 (73%) were male. Of 3 482 295 individuals vaccinated with BNT162b2 (Pfizer-BioNTech), 48 developed myocarditis or myopericarditis within 28 days from the vaccination date compared with unvaccinated individuals (adjusted hazard ratio 1.34 (95% confidence interval 0.90 to 2.00); absolute rate 1.4 per 100 000 vaccinated individuals within 28 days of vaccination (95% confidence interval 1.0 to 1.8)). Adjusted hazard ratios among female participants only and male participants only were 3.73 (1.82 to 7.65) and 0.82 (0.50 to 1.34), respectively, with corresponding absolute rates of 1.3 (0.8 to 1.9) and 1.5 (1.0 to 2.2) per 100 000 vaccinated individuals within 28 days of vaccination, respectively. The adjusted hazard ratio among 12-39 year olds was 1.48 (0.74 to 2.98) and the absolute rate was 1.6 (1.0 to 2.6) per 100 000 vaccinated individuals within 28 days of vaccination. Among 498 814 individuals vaccinated with mRNA-1273 (Moderna), 21 developed myocarditis or myopericarditis within 28 days from vaccination date (adjusted hazard ratio 3.92 (2.30 to 6.68); absolute rate 4.2 per 100 000 vaccinated individuals within 28 days of vaccination (2.6 to 6.4)). Adjusted hazard ratios among women only and men only were 6.33 (2.11 to 18.96) and 3.22 (1.75 to 5.93), respectively, with corresponding absolute rates of 2.0 (0.7 to 4.8) and 6.3 (3.6 to 10.2) per 100 000 vaccinated individuals within 28 days of vaccination, respectively. The adjusted hazard ratio among 12-39 year olds was 5.24 (2.47 to 11.12) and the absolute rate was 5.7 (3.3 to 9.3) per 100 000 vaccinated individuals within 28 days of vaccination.ConclusionsVaccination with mRNA-1273 was associated with a significantly increased risk of myocarditis or myopericarditis in the Danish population, primarily driven by an increased risk among individuals aged 12-39 years, while BNT162b2 vaccination was only associated with a significantly increased risk among women. However, the absolute rate of myocarditis or myopericarditis after SARS-CoV-2 mRNA vaccination was low, even in younger age groups. The benefits of SARS-CoV-2 mRNA vaccination should be taken into account when interpreting these findings. Larger multinational studies are needed to further investigate the risks of myocarditis or myopericarditis after vaccination within smaller subgroups.

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Gender- and age-related differences of statin use on incident dementia in patients with rheumatoid arthritis: a Nationwide population-based cohort study

Lipids in Health and Disease ◽

10.1186/s12944-021-01465-1 ◽

2021 ◽

Vol 20 (1) ◽

Author(s):

Tsung-Kun Lin ◽

Jing-Yang Huang ◽

Lung-Fa Pan ◽

Gwo-Ping Jong

Keyword(s):

Rheumatoid Arthritis ◽

Cohort Study ◽

Subgroup Analysis ◽

Cox Regression ◽

Population Based ◽

Age Related ◽

Hazard Ratios ◽

Incident Dementia ◽

Gender And Age ◽

New Onset

Abstract Background Some observational studies have found a significant association between the use of statin and a reduced risk of dementia. However, the results of these studies are unclear in patients with rheumatoid arthritis (RA). This study is to determine the association between the use of statins and the incidence of dementia according to sex and age-related differences in patients with RA. Methods We conducted a nationwide retrospective cohort study using the Taiwan Health Insurance Review and Assessment Service database (2003–2016). The primary outcome assessed was the risk of dementia by estimating hazard ratios (HRs) and 95% confidence intervals (CIs). Multiple Cox regression was used to estimate the adjusted hazard ratio of new-onset dementia. Subgroup analysis was also conducted. Results Among the 264,036 eligible patients with RA aged > 40 years, statin users were compared with non-statin users by propensity score matching at a ratio of 1:1 (25,764 in each group). However, no association was found between the use of statins and the risk of new-onset dementia (NOD) in patients with RA (HR: 1.01; 95% CI: 0.97–1.06). The subgroup analysis identified the use of statin as having a protective effect against developing NOD in male and older patients. Conclusion No association was observed between the use of a statin and the risk of NOD in patients with RA, including patients of both genders and aged 40–60 years, but these parameters were affected by gender and age. The decreased risk of NOD in patients with RA was greater among older male patients. Use of a statin in older male (> 60 years) patients with RA may be needed in clinical practice to prevent dementia.

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Gender- and Age-related Differences of Statin Use on Incident Dementia in Patients with Rheumatoid Arthritis: A Nationwide Population-based Cohort Study

10.21203/rs.3.rs-249981/v1 ◽

2021 ◽

Author(s):

Tsung-Kun Lin ◽

Jing-Yang Huang ◽

Lung-Fa Pan ◽

Gwo-Ping Jong

Keyword(s):

Rheumatoid Arthritis ◽

Cohort Study ◽

Subgroup Analysis ◽

Older Patients ◽

Cox Regression ◽

Population Based ◽

Age Related ◽

Hazard Ratios ◽

Gender And Age ◽

New Onset

Abstract Background: Some observational studies have found a significant association between the use of statin and a reduced risk of dementia. However, the results of these studies are unclear in patients with rheumatoid arthritis (RA). This study is to determine the association between the use of statins and the incidence of dementia according to sex and age-related differences in patients with RA.Methods: We conducted a nationwide retrospective cohort study using the Taiwan Health Insurance Review and Assessment Service database (2003–2016). The primary outcome assessed was the risk of dementia by estimating hazard ratios (HRs) and 95% confidence intervals (CIs). Multiple Cox regression was used to estimate the adjusted hazard ratio of new-onset dementia. Subgroup analysis was also conducted.Results: Among the 264,036 eligible patients with RA aged > 40 years, statin users were compared with non-statin users by propensity score matching at a ratio of 1:1 (25,764 in each group). However, no association was found between the use of statins and the risk of new-onset dementia (NOD) in patients with RA (HR: 1.01; 95%CI: 0.97–1.06). The subgroup analysis identified the use of statin as having a protective effect against developing NOD in male and older patients.Conclusion: There is no association between the use of statin and the risk of NOD in patients with RA, but these parameters are influenced by gender and age. The decreased risk of NOD in patients with RA was greater among male and older patients. The use of statin in older male patients with RA for the prevention of dementia may be needed in clinical practice.

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Pregnancy, pregnancy loss and the risk of diabetes in Chinese women: findings from the China Kadoorie Biobank

European Journal of Epidemiology ◽

10.1007/s10654-019-00582-7 ◽

2019 ◽

Vol 35 (3) ◽

pp. 295-303

Author(s):

Sanne A. E. Peters ◽

◽

Ling Yang ◽

Yu Guo ◽

Yiping Chen ◽

...

Keyword(s):

Pregnancy Loss ◽

Cox Regression ◽

Chinese Women ◽

Later Life ◽

Induced Abortion ◽

Hazard Ratios ◽

Increased Risk ◽

History Of ◽

Incident Cases

AbstractPregnancy and pregnancy loss may be associated with increased risk of diabetes in later life. However, the evidence is inconsistent and sparse, especially among East Asians where reproductive patterns differ importantly from those in the West. We examined the associations of pregnancy and pregnancy loss (miscarriage, induced abortion, and still birth) with the risk of incident diabetes in later life among Chinese women. In 2004–2008, the nationwide China Kadoorie Biobank recruited 302 669 women aged 30–79 years from 10 (5 urban, 5 rural) diverse localities. During 9.2 years of follow-up, 7780 incident cases of diabetes were recorded among 273,383 women without prior diabetes and cardiovascular disease at baseline. Cox regression yielded multiple-adjusted hazard ratios (HRs) for the risk of diabetes associated with pregnancy and pregnancy loss. Overall, 99% of women had been pregnant, of whom 10%, 53%, and 6% reported having a history of miscarriage, induced abortion, and stillbirth, respectively. Among ever pregnant women, each additional pregnancy was associated with an adjusted HR of 1.04 (95% CI 1.03; 1.06) for diabetes. Compared with those without pregnancy loss, women with a history of pregnancy loss had an adjusted HR of 1.07 (1.02; 1.13) and the HRs increased with increasing number of pregnancy losses, irrespective of the number of livebirths; the adjusted HR was 1.03 (1.00; 1.05) for each additional pregnancy loss. The strength of the relationships differed marginally by type of pregnancy loss. Among Chinese women, a higher number of pregnancies and pregnancy losses were associated with a greater risk of diabetes.

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Pre-eclampsia and risk of later kidney disease: nationwide cohort study

BMJ ◽

10.1136/bmj.l1516 ◽

2019 ◽

pp. l1516 ◽

Cited By ~ 22

Author(s):

Jonas H Kristensen ◽

Saima Basit ◽

Jan Wohlfahrt ◽

Mette Brimnes Damholt ◽

Heather A Boyd

Keyword(s):

Chronic Kidney Disease ◽

Cohort Study ◽

Kidney Disease ◽

Outcome Measure ◽

Cox Regression ◽

Hazard Ratio ◽

Hazard Ratios ◽

Gestational Age At Delivery ◽

History Of

ABSTRACTObjectiveTo investigate associations between pre-eclampsia and later risk of kidney disease.DesignNationwide register based cohort study.SettingDenmark.PopulationAll women with at least one pregnancy lasting at least 20 weeks between 1978 and 2015.Main outcome measureHazard ratios comparing rates of kidney disease between women with and without a history of pre-eclampsia, stratified by gestational age at delivery and estimated using Cox regression.ResultsThe cohort consisted of 1 072 330 women followed for 19 994 470 person years (average 18.6 years/woman). Compared with women with no previous pre-eclampsia, those with a history of pre-eclampsia were more likely to develop chronic renal conditions: hazard ratio 3.93 (95% confidence interval 2.90 to 5.33, for early preterm pre-eclampsia (delivery <34 weeks); 2.81 (2.13 to 3.71) for late preterm pre-eclampsia (delivery 34-36 weeks); 2.27 (2.02 to 2.55) for term pre-eclampsia (delivery ≥37 weeks). In particular, strong associations were observed for chronic kidney disease, hypertensive kidney disease, and glomerular/proteinuric disease. Adjustment for cardiovascular disease and hypertension only partially attenuated the observed associations. Stratifying the analyses on time since pregnancy showed that associations between pre-eclampsia and chronic kidney disease and glomerular/proteinuric disease were much stronger within five years of the latest pregnancy (hazard ratio 6.11 (3.84 to 9.72) and 4.77 (3.88 to 5.86), respectively) than five years or longer after the latest pregnancy (2.06 (1.69 to 2.50) and 1.50 (1.19 to 1.88). By contrast, associations between pre-eclampsia and acute renal conditions were modest.Conclusions Pre-eclampsia, particularly early preterm pre-eclampsia, was strongly associated with several chronic renal disorders later in life. More research is needed to determine which women are most likely to develop kidney disease after pre-eclampsia, what mechanisms underlie the association, and what clinical follow-up and interventions (and in what timeframe post-pregnancy) would be most appropriate and effective.

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Increased Risk of Temporomandibular Joint Disorder in Patients with Rheumatoid Arthritis: A Longitudinal Follow-Up Study

Journal of Clinical Medicine ◽

10.3390/jcm9093005 ◽

2020 ◽

Vol 9 (9) ◽

pp. 3005

Author(s):

Soo-Hwan Byun ◽

Chanyang Min ◽

Hyo-Geun Choi ◽

Seok-Jin Hong

Keyword(s):

Rheumatoid Arthritis ◽

Temporomandibular Disorder ◽

Population Data ◽

Control Group ◽

Chi Square ◽

Kaplan Meier ◽

Hazard Ratios ◽

Increased Risk ◽

Joint Disorder

We evaluated the incidence of temporomandibular disorder (TMD) in patients with rheumatoid arthritis (RA) and examined the association between TMD and RA, through longitudinal follow-up. Population data from the Korean National Health Insurance Service-Health Screening Cohort from 2002 to 2015 was used. From 514,866 subjects, 3122 with RA were matched with 12,488 controls in a 1:4 ratio. The crude and adjusted models (for obesity, smoking, alcohol consumption, blood pressure, blood glucose, total cholesterol, and Charlson Comorbidity Index scores) were calculated. Chi-square tests, Kaplan-Meier (KM) analysis, and two-tailed analyses were used for statistical analysis. Stratified Cox proportional hazard models were used to assess the hazard ratios (HR) and 95% confidence intervals (CI) for TMD in the RA group, compared to those in the control group. The adjusted HR for TMD in RA was 2.52 (95% CI = 1.70–3.74), compared to the control group. The results were consistent with the subgroup analyses, according to age and sex, except in men older than 60 years of age. KM analysis showed similar results. Hence, we found that patients with RA have a higher risk of TMD, and should be observed for symptoms of the initial stage of TMD to prevent the risk of aggravation.

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PHASES Score for Prediction of Intracranial Aneurysm Growth

Stroke ◽

10.1161/strokeaha.114.008198 ◽

2015 ◽

Vol 46 (5) ◽

pp. 1221-1226 ◽

Cited By ~ 68

Author(s):

Daan Backes ◽

Mervyn D.I. Vergouwen ◽

Andreas T. Tiel Groenestege ◽

A. Stijntje E. Bor ◽

Birgitta K. Velthuis ◽

...

Keyword(s):

Intracranial Aneurysm ◽

Cox Regression ◽

Continuous Variable ◽

Aneurysm Rupture ◽

Hazard Ratios ◽

Unruptured Intracranial Aneurysms ◽

Increased Risk ◽

Risk Of Rupture ◽

Aneurysm Growth

Background and Purpose— Growth of an intracranial aneurysm occurs in around 10% of patients at 2-year follow-up imaging and may be associated with aneurysm rupture. We investigated whether PHASES, a score providing absolute risks of aneurysm rupture based on 6 easily retrievable risk factors, also predicts aneurysm growth. Methods— In a multicenter cohort of patients with unruptured intracranial aneurysms and follow-up imaging with computed tomography angiography or magnetic resonance angiography, we performed univariable and multivariable Cox regression analyses for the predictors of the PHASES score at baseline, with aneurysm growth as outcome. We calculated hazard ratios and corresponding 95% confidence intervals (CI), with the PHASES score as continuous variable and after division into quartiles. Results— We included 557 patients with 734 unruptured aneurysms. Eighty-nine (12%) aneurysms in 87 patients showed growth during a median follow-up of 2.7 patient-years (range 0.5–10.8). Per point increase in PHASES score, hazard ratio for aneurysm growth was 1.32 (95% CI, 1.22–1.43). With the lowest quartile of the PHASES score (0–1) as reference, hazard ratios were for the second (PHASES 2–3) 1.07 (95% CI, 0.49–2.32), the third (PHASES 4) 2.29 (95% CI, 1.05–4.95), and the fourth quartile (PHASES 5–14) 2.85 (95% CI, 1.43–5.67). Conclusions— Higher PHASES scores were associated with an increased risk of aneurysm growth. Because higher PHASES scores also predict aneurysm rupture, our findings suggest that aneurysm growth can be used as surrogate outcome measure of aneurysm rupture in follow-up studies on risk prediction or interventions aimed to reduce the risk of rupture.

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Association of Rosacea With Cardiovascular Disease: A Retrospective Cohort Study

Journal of the American Heart Association ◽

10.1161/jaha.120.020671 ◽

2021 ◽

Author(s):

Daein Choi ◽

Sungjun Choi ◽

Seulggie Choi ◽

Sang Min Park ◽

Hyun‐Sun Yoon

Keyword(s):

Risk Factors ◽

Cardiovascular Disease ◽

Coronary Heart Disease ◽

Cohort Study ◽

Heart Disease ◽

Retrospective Cohort Study ◽

Retrospective Cohort ◽

Cox Regression ◽

Hazard Ratios ◽

Increased Risk

Background There is emerging evidence that rosacea, a chronic cutaneous inflammatory disease, is associated with various systemic diseases. However, its association with cardiovascular disease (CVD) remains controversial. We aimed to investigate whether patients with rosacea are at increased risk of developing CVD. Methods and Results This retrospective cohort study from the Korean National Health Insurance Service‐Health Screening Cohort included patients with newly diagnosed rosacea (n=2681) and age‐, sex‐, and index year–matched reference populations without rosacea (n=26 810) between 2003 and 2014. The primary outcome was subsequent CVD including coronary heart disease and stroke. Multivariable Cox regression analyses were used to evaluate adjusted hazard ratios for subsequent CVD adjusted for major risk factors of CVD. Compared with the reference population (13 410 women; mean [SD] age, 57.7 [9.2] years), patients with rosacea (1341 women; mean [SD] age, 57.7 [9.2] years) displayed an increased risk for CVD (adjusted hazard ratios, 1.20; 95% CI, 1.03–1.40) and coronary heart disease (adjusted hazard ratios, 1.29; 95% CI, 1.05–1.60). The risk for stroke was not significantly elevated (adjusted hazard ratios, 1.12; 95% CI, 0.91–1.37). Conclusions This study suggests that patients with rosacea are more likely to develop subsequent CVD. Proper education for patients with rosacea to manage other modifiable risk factors of CVD along with rosacea is needed.

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Endometrial Cancer Risk in Women with Germline BRCA1 or BRCA2 Mutations: Multicenter Cohort Study

JNCI Journal of the National Cancer Institute ◽

10.1093/jnci/djab036 ◽

2021 ◽

Author(s):

Marthe M de Jonge ◽

Cornelis D de Kroon ◽

Denise J Jenner ◽

Jan Oosting ◽

Joanne A de Hullu ◽

...

Keyword(s):

Endometrial Cancer ◽

Cohort Study ◽

General Population ◽

Cox Regression ◽

Statistical Tests ◽

Brca1 Mutation ◽

Brca2 Mutation ◽

Mutation Carriers ◽

Increased Risk

Abstract Background Endometrial cancer (EC) risk in BReast CAncer gene 1/2 (BRCA1/2) mutation carriers is uncertain, therefore we assessed this in a large Dutch nationwide cohort study. Methods 5,980 BRCA1/2 (3,788 BRCA1, 2,151 gBRCA2, 41 both BRCA1/BRCA2) and 8,451 non-BRCA1/2 mutation carriers were selected from the HEBON-cohort. Follow-up started at date of nationwide PALGA coverage (January 1, 1989) or at the age of 25 years (whichever came last), and ended at date of EC diagnosis, last follow-up or death (whichever came first). EC risk in BRCA1/2 mutation carriers was compared to: 1) general population, estimating standardized incidence ratios (SIRs) based on Dutch population-based incidence rates; and 2) non-BRCA1/2 mutation carriers, using Cox-regression analyses, expressed as hazard ratio (HR). Statistical tests were two-sided. Results Fifty-eight BRCA1/2 and 33 non-BRCA1/2 mutation carriers developed EC over 119,296 and 160,841 person-years, respectively (SIR = 2.83, 95% confidence interval (CI) = 2.18–3.65; and HR = 2.37, 95% CI = 1.53–3.69, respectively). gBRCA1 mutation carriers showed increased risks for EC overall (SIR = 3.51, 95% CI = 2.61–4.72; HR = 2.91, 95% CI = 1.83–4.66), serous-like EC (SIR: 12.64, 95% CI = 7.62–20.96; HR = 10.48, 95% CI = 2.95–37.20), endometrioid EC (SIR = 2.63, 95% CI = 1.80–3.83; HR = 2.01, 95% CI = 1.18–3.45) and TP53-mutated EC (HR = 15.71, 95% CI = 4.62–53.40). For BRCA2 mutation carriers, overall (SIR = 1.70, 95% CI = 1.01–2.87), and serous-like EC risks (SIR = 5.11, 95% CI = 1.92–13.63) were increased when compared to the general population. Absolute risks by 75 years remained low (overall EC = 3.0%; serous-like EC = 1.1%). Conclusions BRCA1/2 mutation carriers have a 2- to 3-fold increased risk for EC, with highest risk observed for the rare subgroups of serous-like and p53-abnormal EC in BRCA1 mutation carriers.

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