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Hau EM, Sláma T, Essig S, Michel G, Wengenroth L, Bergstraesser E, von der Weid NX, Schindera C, Kuehni CE. Validation of self-reported cardiovascular problems in childhood cancer survivors by contacting general practitioners: feasibility and results. BMC PRIMARY CARE 2024; 25:81. [PMID: 38459512 PMCID: PMC10921568 DOI: 10.1186/s12875-024-02322-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/01/2023] [Accepted: 02/23/2024] [Indexed: 03/10/2024]
Abstract
BACKGROUND Epidemiological studies often rely on self-reported health problems and validation greatly improves study quality. In a study of late effects after childhood cancer, we validated self-reported cardiovascular problems by contacting general practitioners (GPs). This paper describes: (a) the feasibility of this approach; and (b) the agreement between survivor-reports and reports from their GP. METHODS The Swiss Childhood Cancer Survivor Study (SCCSS) contacts all childhood cancer survivors registered in the Swiss Childhood Cancer Registry since 1976 who survived at least 5 years from cancer diagnosis. We validated answers of all survivors who reported a cardiovascular problem in the questionnaire. Reported cardiovascular problems were hypertension, arrhythmia, congestive heart failure, myocardial infarction, angina pectoris, stroke, thrombosis, and valvular problems. In the questionnaire, we further asked survivors to provide a valid address of their GP and a consent for contact. We sent case-report forms to survivors' GPs and requested information on cardiovascular diagnoses of their patients. To determine agreement between information reported by survivors and GPs, we calculated Cohen's kappa (κ) coefficients for each category of cardiovascular problems. RESULTS We used questionnaires from 2172 respondents of the SCCSS. Of 290 survivors (13% of 2172) who reported cardiovascular problems, 166 gave consent to contact their GP and provided a valid address. Of those, 135 GPs (81%) replied, and 128 returned the completed case-report form. Survivor-reports were confirmed by 54/128 GPs (42%). Of the 54 GPs, 36 (28% of 128) confirmed the problems as reported by the survivors; 11 (9% of 128) confirmed the reported problem(s) and gave additional information on more cardiovascular outcomes; and seven GPs (5% of 128) confirmed some, but not all cardiovascular problems. Agreement between GPs and survivors was good for stroke (κ = 0.79), moderate for hypertension (κ = 0.51), arrhythmias (κ = 0.41), valvular problems (κ = 0.41) and thrombosis (κ = 0.56), and poor for coronary heart disease (κ = 0.15) and heart failure (κ = 0.32). CONCLUSIONS Despite excellent GP compliance, it was found unfeasible to validate self-reported cardiovascular problems via GPs because they do not serve as gatekeepers in the Swiss health care system. It is thus necessary to develop other validation methods to improve the quality of patient-reported outcomes.
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Affiliation(s)
- Eva-Maria Hau
- Childhood Cancer Research Group, Institute of Social and Preventive Medicine, University of Bern, Bern, Switzerland
| | - Tomáš Sláma
- Childhood Cancer Research Group, Institute of Social and Preventive Medicine, University of Bern, Bern, Switzerland
- Graduate School for Cellular and Biomedical Sciences, University of Bern, Bern, Switzerland
| | - Stefan Essig
- Center for Primary and Community Care, University of Lucerne, Lucerne, Switzerland
| | - Gisela Michel
- Faculty of Health Sciences and Medicine, University of Lucerne, Lucerne, Switzerland
| | - Laura Wengenroth
- Institute and Clinic for Occupational, Social and Environmental Medicine, LMU University Hospital, LMU Munich, Munich, Germany
| | - Eva Bergstraesser
- Paediatric Palliative Care and Children's Research Center CRC, University Children's Hospital Zurich, Zurich, Switzerland
| | - Nicolas X von der Weid
- Division of Paediatric Oncology/Haematology, University Children's Hospital Basel, University of Basel, Basel, Switzerland
| | - Christina Schindera
- Childhood Cancer Research Group, Institute of Social and Preventive Medicine, University of Bern, Bern, Switzerland
- Division of Paediatric Oncology/Haematology, University Children's Hospital Basel, University of Basel, Basel, Switzerland
| | - Claudia E Kuehni
- Childhood Cancer Research Group, Institute of Social and Preventive Medicine, University of Bern, Bern, Switzerland.
- Paediatric Oncology, Inselspital, Bern University Hospital, University of Bern, Bern, Switzerland.
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Mose J, Jensen KH, Scheel-Hincke LL, Andersen-Ranberg K. Are self-reported medical conditions and medicine use from middle-aged and older adults credible? A validation study comparing Danish SHARE-data with National Health Register data. Ann Epidemiol 2023; 87:100-106. [PMID: 37903678 DOI: 10.1016/j.annepidem.2023.09.009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2022] [Revised: 09/06/2023] [Accepted: 09/25/2023] [Indexed: 11/01/2023]
Abstract
PURPOSE Self-reported information on medical conditions and medicine use is widely used in epidemiological research. We investigated the validity of self-reported medical conditions and medicine use from Danish participants in the Survey of Health, Ageing and Retirement in Europe. METHODS Self-reported health data were linked at individual level with the National Patient Registry and the Danish National Prescription Registry (n = 5572). Agreement was assessed by kappa value and presented as sensitivity, specificity, predictive values, and odds ratios. RESULTS The agreement of self-reported medical conditions varied by type (κ = 0.23-0.67), lowest for cholesterol-related diseases, highest for diabetes. Self-reported medicine use varied by medication type (κ = 0.33-0.90) lowest for painkillers, highest for diabetes. Women had lower odds for self-reporting medicine use correctly but higher odds for self-reported diseases. Higher age was associated with lower agreement, while higher education with higher agreement. CONCLUSIONS Although Danish data from the Survey of Health, Ageing and Retirement in Europe on medical conditions and medicine vary, the data are valid for epidemiological use for most medicine data, and for diseases associated with hospitalizations or influencing everyday life. Caution is warranted for self-reported data from 70+ year olds and people with lower educational level.
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Affiliation(s)
- Jens Mose
- Department of Geriatric Medicine, Odense University Hospital, Odense, Denmark.
| | | | - Lasse Lybecker Scheel-Hincke
- Unit for Epidemiology, Biostatistics and Biodemography, Department of Public Health, University of Southern Denmark, Odense, Denmark
| | - Karen Andersen-Ranberg
- Department of Geriatric Medicine, Odense University Hospital, Odense, Denmark; Unit for Epidemiology, Biostatistics and Biodemography, Department of Public Health, University of Southern Denmark, Odense, Denmark; Department of Clinical Research, University of Southern Denmark, Odense, Denmark
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3
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Guzman-Vilca WC, Quispe-Villegas GA, Carrillo-Larco RM. Predicted heart age profile across 41 countries: A cross-sectional study of nationally representative surveys in six world regions. EClinicalMedicine 2022; 52:101688. [PMID: 36313150 PMCID: PMC9596311 DOI: 10.1016/j.eclinm.2022.101688] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/20/2022] [Revised: 09/13/2022] [Accepted: 09/14/2022] [Indexed: 11/05/2022] Open
Abstract
BACKGROUND Predicted heart age (PHA) can simplify communicating the absolute cardiovascular disease (CVD) risk. Few studies have characterized PHA across multiple populations, and none has described whether people with excess PHA are eligible for preventive treatment for CVD. METHODS Pooled analysis of 41 World Health Organization (WHO) STEPS surveys conducted in 41 countries in six world regions between 2013 and 2019. PHA was calculated as per the non-laboratory Framingham risk score in adults without history of CVD. We described the differences between chronological age and PHA, the distribution of PHA, and the proportion of people with excess PHA that were eligible for antihypertensive and lipid-lowering treatment following the WHO guidelines. Logistic regression models were fitted to assess sociodemographic and health-related variables associated with PHA excess. FINDINGS 94,655 individuals aged 30-74 years were included. 36% of those aged 30-34 years had a PHA of 30-34 years; 9% of those aged 60-64 years had a PHA of 60-64 years. Countries in Africa had the lowest prevalence of very high PHA (i.e., PHA exceeding chronological age in ≥5 years) and countries in Western Pacific had the highest. ≥50% of the population with PHA excess (i.e., PHA exceeding chronological age in ≥1 year) was not eligible for antihypertensive nor lipid-lowering treatment. Abdominal obesity, high total cholesterol, smoking and having diabetes were associated with higher odds of having PHA excess, whereas higher education and employment were inversely associated with excess PHA. INTERPRETATION PHA is generally higher than chronological age in LMICs and there are regional disparities. Most people with excess PHA would not be eligible to receive preventive medication. FUNDING RMC-L is supported by a Wellcome Trust International Training Fellowship (214185/Z/18/Z).
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Affiliation(s)
- Wilmer Cristobal Guzman-Vilca
- School of Medicine “Alberto Hurtado”, Universidad Peruana Cayetano Heredia, Lima, Peru
- CRONICAS Centre of Excellence in Chronic Diseases, Universidad Peruana Cayetano Heredia, Lima, Peru
- Sociedad Científica de Estudiantes de Medicina Cayetano Heredia (SOCEMCH), Universidad Peruana Cayetano Heredia, Lima, Peru
| | - Gustavo A. Quispe-Villegas
- School of Medicine “Alberto Hurtado”, Universidad Peruana Cayetano Heredia, Lima, Peru
- Sociedad Científica de Estudiantes de Medicina Cayetano Heredia (SOCEMCH), Universidad Peruana Cayetano Heredia, Lima, Peru
| | - Rodrigo M. Carrillo-Larco
- CRONICAS Centre of Excellence in Chronic Diseases, Universidad Peruana Cayetano Heredia, Lima, Peru
- Department of Epidemiology and Biostatistics, School of Public Health, Imperial College London, London, UK
- Universidad Continental, Lima, Peru
- Correspondence author at: Department of Epidemiology and Biostatistics, School of Public Health, Imperial College London.
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Maeda D, Matsue Y, Kagiyama N, Jujo K, Saito K, Kamiya K, Saito H, Ogasahara Y, Maekawa E, Konishi M, Kitai T, Iwata K, Wada H, Hiki M, Dotare T, Sunayama T, Kasai T, Nagamatsu H, Ozawa T, Izawa K, Yamamoto S, Aizawa N, Yonezawa R, Oka K, Momomura SI, Minamino T. Inaccurate recognition of own comorbidities is associated with poor prognosis in elderly patients with heart failure. ESC Heart Fail 2022; 9:1351-1359. [PMID: 35088546 PMCID: PMC8934983 DOI: 10.1002/ehf2.13824] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2021] [Revised: 11/30/2021] [Accepted: 01/14/2022] [Indexed: 12/29/2022] Open
Abstract
Aims A patient's understanding of his or her own comorbidities is part of the recommended patient education for those with heart failure. The accuracy of patients' understanding of their comorbidities and its prognostic impact have not been reported. Methods and results Patients hospitalized for heart failure (n = 1234) aged ≥65 years (mean age: 80.1 ± 7.7 years; 531 females) completed a questionnaire regarding their diagnoses of diabetes, malignancy, stroke, hypertension, chronic obstructive pulmonary disease (COPD), and coronary artery disease (CAD). The patients were categorized into three groups based on the number of agreements between self‐reported comorbidities and provider‐reported comorbidities: low (1–2, n = 19); fair (3–4, n = 376); and high (5–6, n = 839) agreement groups. The primary outcome was a composite of all‐cause mortality or heart failure rehospitalization at 1 year. The low agreement group had more comorbidities and a higher prevalence of a history of heart failure. The agreement was good for diabetes (κ = 0.73), moderate for malignancy (κ = 0.56) and stroke (κ = 0.50), and poor‐to‐fair for hypertension (κ = 0.33), COPD (κ = 0.25), and CAD (κ = 0.30). The fair and low agreement groups had poorer outcomes than the good agreement group [fair agreement group: hazard ratio (HR): 1.25; 95% confidence interval (CI): 1.01–1.56; P = 0.041; low agreement group: HR: 2.74: 95% CI: 1.40–5.35; P = 0.003]. Conclusions The ability to recognize their own comorbidities among older patients with heart failure was low. Patients with less accurate recognition of their comorbidities may be at higher risk for a composite of all‐cause mortality or heart failure rehospitalization.
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Affiliation(s)
- Daichi Maeda
- Department of Cardiovascular Biology and Medicine, Juntendo University Graduate School of Medicine, 2-1-1 Hongo, Bunkyo-ku, Tokyo, 113-8421, Japan.,Department of Cardiology, Osaka Medical and Pharmaceutical University, Takatsuki, Japan
| | - Yuya Matsue
- Department of Cardiovascular Biology and Medicine, Juntendo University Graduate School of Medicine, 2-1-1 Hongo, Bunkyo-ku, Tokyo, 113-8421, Japan.,Cardiovascular Respiratory Sleep Medicine, Juntendo University Graduate School of Medicine, Tokyo, Japan
| | - Nobuyuki Kagiyama
- Department of Cardiology, The Sakakibara Heart Institute of Okayama, Okayama, Japan.,Department of Digital Health and Telemedicine R&D, Juntendo University, Tokyo, Japan.,Department of Cardiovascular Biology and Medicine, Juntendo University Faculty of Medicine, Tokyo, Japan
| | - Kentaro Jujo
- Department of Cardiology, Nishiarai Heart Center Hospital, Tokyo, Japan
| | - Kazuya Saito
- Department of Rehabilitation, The Sakakibara Heart Institute of Okayama, Okayama, Japan
| | - Kentaro Kamiya
- Department of Rehabilitation, School of Allied Health Sciences, Kitasato University, Sagamihara, Japan
| | - Hiroshi Saito
- Department of Cardiovascular Biology and Medicine, Juntendo University Graduate School of Medicine, 2-1-1 Hongo, Bunkyo-ku, Tokyo, 113-8421, Japan.,Department of Rehabilitation, Kameda Medical Center, Kamogawa, Japan
| | - Yuki Ogasahara
- Department of Nursing, The Sakakibara Heart Institute of Okayama, Okayama, Japan
| | - Emi Maekawa
- Department of Cardiovascular Medicine, Kitasato University School of Medicine, Sagamihara, Japan
| | - Masaaki Konishi
- Division of Cardiology, Yokohama City University Medical Center, Yokohama, Japan
| | - Takeshi Kitai
- Department of Cardiovascular Medicine, National Cerebral and Cardiovascular Center, Osaka, Japan.,Department of Rehabilitation, Kobe City Medical Center General Hospital, Kobe, Japan
| | - Kentaro Iwata
- Department of Rehabilitation, Kobe City Medical Center General Hospital, Kobe, Japan
| | - Hiroshi Wada
- Department of Cardiovascular Medicine, Saitama Medical Center, Jichi Medical University, Saitama, Japan
| | - Masaru Hiki
- Department of Cardiovascular Biology and Medicine, Juntendo University Graduate School of Medicine, 2-1-1 Hongo, Bunkyo-ku, Tokyo, 113-8421, Japan
| | - Taishi Dotare
- Department of Cardiovascular Biology and Medicine, Juntendo University Graduate School of Medicine, 2-1-1 Hongo, Bunkyo-ku, Tokyo, 113-8421, Japan
| | - Tsutomu Sunayama
- Department of Cardiovascular Biology and Medicine, Juntendo University Graduate School of Medicine, 2-1-1 Hongo, Bunkyo-ku, Tokyo, 113-8421, Japan
| | - Takatoshi Kasai
- Department of Cardiovascular Biology and Medicine, Juntendo University Graduate School of Medicine, 2-1-1 Hongo, Bunkyo-ku, Tokyo, 113-8421, Japan.,Cardiovascular Respiratory Sleep Medicine, Juntendo University Graduate School of Medicine, Tokyo, Japan
| | - Hirofumi Nagamatsu
- Department of Cardiology, Tokai University School of Medicine, Isehara, Japan
| | - Tetsuya Ozawa
- Department of Rehabilitation, Odawara Municipal Hospital, Odawara, Japan
| | - Katsuya Izawa
- Department of Rehabilitation, Kasukabe Chuo General Hospital, Kasukabe, Japan
| | - Shuhei Yamamoto
- Department of Rehabilitation, Shinshu University Hospital, Matsumoto, Japan
| | - Naoki Aizawa
- Department of Cardiovascular Medicine, Nephrology and Neurology, University of the Ryukyus, Okinawa, Japan
| | - Ryusuke Yonezawa
- Rehabilitation Center, Kitasato University Medical Center, Kitamoto, Japan
| | - Kazuhiro Oka
- Department of Rehabilitation, Saitama Citizens Medical Center, Saitama, Japan
| | | | - Tohru Minamino
- Department of Cardiovascular Biology and Medicine, Juntendo University Graduate School of Medicine, 2-1-1 Hongo, Bunkyo-ku, Tokyo, 113-8421, Japan.,Japan Agency for Medical Research and Development-Core Research for Evolutionary Medical Science and Technology (AMED-CREST), Japan Agency for Medical Research and Development, Tokyo, Japan
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Carlson LE, Watt GP, Tonorezos ES, Chow EJ, Yu AF, Woods M, Lynch CF, John EM, Mellemkjӕr L, Brooks JD, Knight JA, Reiner AS, Liang X, Smith SA, Bernstein L, Dauer LT, Cerviño LI, Howell RM, Shore RE, Boice JD, Bernstein JL. Coronary Artery Disease in Young Women After Radiation Therapy for Breast Cancer: The WECARE Study. JACC: CARDIOONCOLOGY 2021; 3:381-392. [PMID: 34604798 PMCID: PMC8463731 DOI: 10.1016/j.jaccao.2021.07.008] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/04/2021] [Revised: 07/14/2021] [Accepted: 07/18/2021] [Indexed: 01/23/2023]
Abstract
Background Radiation therapy (RT) for breast cancer increases risk of coronary artery disease (CAD). Women treated for left- vs right-sided breast cancer receive greater heart radiation exposure, which may further increase this risk. The risk of radiation-associated CAD specifically among younger breast cancer survivors is not well defined. Objectives The purpose of this study was to report CAD risk among participants in the Women's Environmental Cancer and Radiation Epidemiology Study. Methods A total of 1,583 women who were <55 years of age when diagnosed with breast cancer between 1985 and 2008 completed a cardiovascular health questionnaire. Risk of radiation-associated CAD was evaluated by comparing women treated with left-sided RT with women treated with right-sided RT using multivariable Cox proportional hazards models. Effect modification by treatment and cardiovascular risk factors was examined. Results In total, 517 women who did not receive RT and 94 women who had a pre-existing cardiovascular disease diagnosis were excluded, leaving 972 women eligible for analysis. Their median follow-up time was 14 years (range 1-29 years). The 27.5-year cumulative incidences of CAD for women receiving left- vs right-sided RT were 10.5% and 5.8%, respectively (P = 0.010). The corresponding HR of CAD for left- vs right-sided RT in the multivariable Cox model was 2.5 (95% CI: 1.3-4.7). There was no statistically significant effect modification by any factor evaluated. Conclusions Young women treated with RT for left-sided breast cancer had over twice the risk of CAD compared with women treated with RT for right-sided breast cancer. Laterality of RT is independently associated with an increased risk of CAD and should be considered in survivorship care of younger breast cancer patients.
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Affiliation(s)
| | - Gordon P. Watt
- Memorial Sloan Kettering Cancer Center, New York, New York, USA
- Address for correspondence: Dr Gordon P. Watt, Memorial Sloan Kettering Cancer Center, 485 Lexington Avenue, Second Floor, New York, New York 10017. @gp_watt
| | - Emily S. Tonorezos
- National Cancer Institute, Division of Cancer Control and Population Sciences, Rockville, Maryland, USA
| | - Eric J. Chow
- Fred Hutchinson Cancer Research Center, Seattle, Washington, USA
| | - Anthony F. Yu
- Memorial Sloan Kettering Cancer Center, New York, New York, USA
| | - Meghan Woods
- Memorial Sloan Kettering Cancer Center, New York, New York, USA
| | | | | | | | - Jennifer D. Brooks
- University of Toronto, Dalla Lana School of Public Health Sciences, Toronto, Ontario, Canada
| | - Julia A. Knight
- University of Toronto, Dalla Lana School of Public Health Sciences, Toronto, Ontario, Canada
- Lunenfeld-Tanenbaum Research Institute, Sinai Health System, Toronto, Ontario, Canada
| | - Anne S. Reiner
- Memorial Sloan Kettering Cancer Center, New York, New York, USA
| | - Xiaolin Liang
- Memorial Sloan Kettering Cancer Center, New York, New York, USA
| | - Susan A. Smith
- University of Texas MD Anderson Cancer Center, Houston, Texas, USA
| | - Leslie Bernstein
- Beckman Research Institute, City of Hope National Medical Center, Duarte, California, USA
| | | | | | - Rebecca M. Howell
- Lunenfeld-Tanenbaum Research Institute, Sinai Health System, Toronto, Ontario, Canada
| | - Roy E. Shore
- New York University Grossman School of Medicine, New York, New York, USA
| | - John D. Boice
- National Council on Radiation Protection and Measurements, Bethesda, Maryland, USA
- Vanderbilt University, Nashville, Tennessee, USA
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Merzenich H, Blettner M, Niehoff D, Schwentner L, Schmidt M, Schmitt M, Wollschläger D. Cardiac late events in German breast cancer patients: a validation study on the agreement between patient self-reports and information from physicians. BMC Cardiovasc Disord 2018; 18:218. [PMID: 30497402 PMCID: PMC6267788 DOI: 10.1186/s12872-018-0961-7] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2018] [Accepted: 11/20/2018] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Self-administered health-status questionnaires are important tools in epidemiology. The objective of the presented validation study is to measure the agreement between breast cancer patients' self-reports and their physicians' information on late cardiac events, and to investigate determinants of agreement. To estimate possible misclassification is an important requirement for observational studies on cardiovascular endpoints. METHODS A retrospective, multi-center cohort study included 11,982 women diagnosed with breast cancer in Germany in 1998-2008. In 2014, a questionnaire survey assessed cardiovascular risk factors and incident cardiac events after therapy. A validation study was conducted, based on a sample of 3091 breast cancer patients from two university hospitals. Among them, 2261 women (73%) sent back the questionnaire on cardiovascular events, and 1316 women gave consent to request medical records from their general practitioners. A total of 1212/1316 (92.1%) medical records could be obtained for validation. Cohen's kappa coefficient was calculated, and multivariate regression was applied to study the influence of patient characteristics on agreement between both data sources. RESULTS Overall agreement for the composite endpoint of any cardiac event was 84.5% (kappa 0.35). Of 1055 breast cancer patients reporting no cardiac event, 950 (90%) had no such diagnosis in physicians' medical records. A total of 157 breast cancer survivors indicated a cardiac event, and the same diagnosis was confirmed by GPs for 74 (47%) women. For specific diagnoses, moderate to substantial agreement of self-reports was found for myocardial infarction (kappa 0.54) and stroke (kappa 0.61). Poor to fair agreement was present for angina pectoris, valvular heart disease, arrhythmia, and congestive heart failure. Younger age, higher education and a more recent cancer diagnosis were found to be associated with greater total agreement. CONCLUSIONS For the composite endpoint, survivors of breast cancer report the absence of cardiac disease accurately. However, for specific diagnoses, self-reported morbidity data from breast cancer patients may not fully agree with information from physicians. The agreement is moderate for acute events like myocardial infarction and stroke, but poor to fair for chronic diseases.
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Affiliation(s)
- Hiltrud Merzenich
- Institute of Medical Biostatistics, Epidemiology and Informatics, University Medical Center Mainz, Obere Zahlbacher Str. 69, 55131 Mainz, Germany
| | - Maria Blettner
- Institute of Medical Biostatistics, Epidemiology and Informatics, University Medical Center Mainz, Obere Zahlbacher Str. 69, 55131 Mainz, Germany
| | - Dorothea Niehoff
- Institute of Medical Biostatistics, Epidemiology and Informatics, University Medical Center Mainz, Obere Zahlbacher Str. 69, 55131 Mainz, Germany
| | - Lukas Schwentner
- Department of Gynecology and Obstetrics, University Hospital Ulm, Prittwitzstr. 43, 89075 Ulm, Germany
| | - Marcus Schmidt
- Department of Obstetrics and Gynecology, University Medical Center Mainz, 55101 Mainz, Germany
| | - Margit Schmitt
- Department of Gynecology and Obstetrics, University Hospital Ulm, Prittwitzstr. 43, 89075 Ulm, Germany
| | - Daniel Wollschläger
- Institute of Medical Biostatistics, Epidemiology and Informatics, University Medical Center Mainz, Obere Zahlbacher Str. 69, 55131 Mainz, Germany
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