Clinical EpidemiologyPub Date : 2024-10-22eCollection Date: 2024-01-01DOI: 10.2147/CLEP.S467341
Tino Severinsen, Helga Lillian Gudmundsdottir, Anna Axelsson Raja, Emil Loldrup Fosbøl, Henning Bundgaard, Jens Jakob Thune
{"title":"Validity of a Hypertrophic Cardiomyopathy Diagnosis in Adult Patients in the Danish National Patient Register.","authors":"Tino Severinsen, Helga Lillian Gudmundsdottir, Anna Axelsson Raja, Emil Loldrup Fosbøl, Henning Bundgaard, Jens Jakob Thune","doi":"10.2147/CLEP.S467341","DOIUrl":"10.2147/CLEP.S467341","url":null,"abstract":"<p><strong>Purpose: </strong>To assess the positive predictive value (PPV) of the diagnostic codes for hypertrophic cardiomyopathy (HCM) in the Danish National Patient Register (DNPR) and identify factors affecting the PPV.</p><p><strong>Patients and methods: </strong>We randomly sampled 200 patients registered in DNPR with the diagnostic codes DI421 (obstructive) or DI422 (non-obstructive) HCM, from Eastern Denmark, between December 1<sup>st</sup>, 2017, and September 16<sup>th</sup>, 2021. We assessed patients' medical records and classified whether the diagnosis of HCM was correct, incorrect, or uncertain according to the European Society of Cardiology (ESC) guidelines. Overall PPVs were estimated for all hospitals irrespective of specialty and for dedicated centers for inherited cardiac diseases.</p><p><strong>Results: </strong>Of the 200 patients, seven were excluded; six were younger than 18 years when initially diagnosed and one adult patient had requested that their medical records be unavailable for research purposes. Of the 193 patients (median age 61 years, Interquartile range (IQR) 50-70, 40% female) with medical records available for assessment, 148 (77%) patients were registered correctly, 41 (21%) were incorrectly registered and for four (2%) patients there was insufficient data to determine if the diagnosis was correct. The overall PPV was 0.77 (95% confidence interval (CI) 0.70-0.82). The PPV for patients diagnosed in dedicated centers for inherited cardiac diseases was 0.91 (95% CI 0.84-0.95). For patients diagnosed in a dedicated center for inherited cardiac diseases with more than one clinical visit, the PPV increased to 0.99 (95% CI 0.93-1), however with the risk of a reduced sensitivity as these patients constituted only 52% of the correctly registered patients.</p><p><strong>Conclusion: </strong>The overall PPV of the HCM diagnostic codes in the DNPR was 0.77 (95% CI 0.70-0.82). The validity of the diagnosis was higher at dedicated centers for inherited cardiac diseases. These findings may prove useful for future register-based research.</p>","PeriodicalId":10362,"journal":{"name":"Clinical Epidemiology","volume":null,"pages":null},"PeriodicalIF":3.4,"publicationDate":"2024-10-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11512520/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142496297","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Clinical EpidemiologyPub Date : 2024-10-21eCollection Date: 2024-01-01DOI: 10.2147/CLEP.S501224
Chaocan Hong, Yijie Ma, Changhu Yan
{"title":"Assessing the Role of Serum Prealbumin in Prognostic Studies of Stroke: Reflections on Existing Research Methods [Letter].","authors":"Chaocan Hong, Yijie Ma, Changhu Yan","doi":"10.2147/CLEP.S501224","DOIUrl":"10.2147/CLEP.S501224","url":null,"abstract":"","PeriodicalId":10362,"journal":{"name":"Clinical Epidemiology","volume":null,"pages":null},"PeriodicalIF":3.4,"publicationDate":"2024-10-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11512476/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142496295","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Clinical EpidemiologyPub Date : 2024-10-21eCollection Date: 2024-01-01DOI: 10.2147/CLEP.S485953
Cheng-Yang Hsieh, Po-Ting Chen, Shih-Chieh Shao, Swu-Jane Lin, Shu-Chen Liao, Edward Chia-Cheng Lai
{"title":"Validating ICD-10 Diagnosis Codes for Guillain-Barré Syndrome in Taiwan's National Health Insurance Claims Database.","authors":"Cheng-Yang Hsieh, Po-Ting Chen, Shih-Chieh Shao, Swu-Jane Lin, Shu-Chen Liao, Edward Chia-Cheng Lai","doi":"10.2147/CLEP.S485953","DOIUrl":"https://doi.org/10.2147/CLEP.S485953","url":null,"abstract":"<p><strong>Purpose: </strong>To validate the International Classification of Diseases, 10th Revision (ICD-10) codes for Guillain-Barré syndrome (GBS) in Taiwan's insurance claims database.</p><p><strong>Methods: </strong>We identified adult patients hospitalized at any Chang Gung Memorial Foundation branch hospital between January 1st, 2017, and December 31st, 2022, with ICD-10 code G61.0 in any of the five discharge diagnosis positions, indicating possible Guillain-Barré syndrome. We then validated the possible GBS diagnosis using data from electronic medical records of the identified patients, based on the diagnostic criteria established by the National Institute of Neurological Disorders and Stroke. We determined the positive predictive values (PPV) of various operational definitions, including the position (primary or other) where the code was recorded in the discharge diagnosis, nerve conduction study (NCS) claims, and / or specific GBS treatments.</p><p><strong>Results: </strong>The final validation cohort of 484 patients with ICD-10 code for GBS in the discharge diagnosis was found to include 368 true GBS patients. Identifying inpatients using only the ICD-10 code for GBS in any of the five positions for discharge diagnosis yielded a PPV of 76.0%. With more restrictive definitions (primary diagnosis only, or requiring additional claims for NCS and/or treatments), the PPV tended to increase, but with fewer true GBS patients identified. Using ICD-10 GBS code in the primary diagnosis plus NCS and treatment claims yielded the highest PPV (98.3%); however, 140 (38.0%) of the true GBS patients were missed using this definition. In contrast, using the ICD-10 GBS code in any position, plus claims for NCS, achieved a relatively good PPV (85.8%) with minimal loss of true GBS patients (13, ie, 3.5%).</p><p><strong>Conclusion: </strong>In Taiwan's NHI claims data, identifying true GBS patients using only the ICD-10 code yielded a PPV of 76.0%; however, adding claims for diagnostic procedure and GBS treatment increased the PPV to 98.3%.</p>","PeriodicalId":10362,"journal":{"name":"Clinical Epidemiology","volume":null,"pages":null},"PeriodicalIF":3.4,"publicationDate":"2024-10-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11497080/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142496296","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Clinical EpidemiologyPub Date : 2024-10-17eCollection Date: 2024-01-01DOI: 10.2147/CLEP.S480525
Jan Hillert, Helmut Butzkueven, Melinda Magyari, Stig Wergeland, Nicholas Moore, Merja Soilu-Hänninen, Tjalf Ziemssen, Jens Kuhle, Luigi Pontieri, Lars Forsberg, Jan Harald Aarseth, Chao Zhu, Nicholas Sicignano, Vasili Mushnikov, Irene Bezemer, Meritxell Sabidó
{"title":"Harmonized Data Quality Indicators Maintain Data Quality in Long-Term Safety Studies Using Multiple Sclerosis Registries/Data Sources: Experience from the CLARION Study.","authors":"Jan Hillert, Helmut Butzkueven, Melinda Magyari, Stig Wergeland, Nicholas Moore, Merja Soilu-Hänninen, Tjalf Ziemssen, Jens Kuhle, Luigi Pontieri, Lars Forsberg, Jan Harald Aarseth, Chao Zhu, Nicholas Sicignano, Vasili Mushnikov, Irene Bezemer, Meritxell Sabidó","doi":"10.2147/CLEP.S480525","DOIUrl":"10.2147/CLEP.S480525","url":null,"abstract":"<p><strong>Purpose: </strong>Understanding the long-term safety of disease-modifying therapies for multiple sclerosis (MS) in routine clinical practice can be undertaken through registry-based studies. However, variability of data quality across such sources poses the challenge of data fit for regulatory decision-making. CLARION, a non-interventional cohort safety study of cladribine tablets, combines aggregated data from MS registries/data sources, except in Germany (which utilizes primary data collection). We describe the application of key data quality indicators (DQIs) within CLARION to evaluate data quality over time, as recommended by the European Medicines Agency (EMA) guideline on registry-based studies.</p><p><strong>Methods: </strong>DQIs were defined with participating registries/sources; they were used to assess data quality according to the EMA Data Quality Framework, addressing consistency, accuracy, completeness, and study representativeness. DQIs were associated with potential remedial measures if data quality was not met. DQIs were summarized overall and for individual MS registries/data sources to November 1, 2022.</p><p><strong>Results: </strong>A total of 28 DQIs were analyzed using data from 5069 patients arising from eight MS registries/data sources and 14 countries. The Representativeness DQIs showed that 72.0% of patients were female, median age at MS diagnosis was 29.0 to 43.3 years, and 93.5% had relapsing-remitting MS. Consistency DQIs showed a total of 2899 patients had achieved at least two years of follow-up; 6.9% did not have any recorded visits during this timeframe. Discrepant values were assessed as part of Accuracy DQIs, and improvements over time were noted for recorded dates of MS onset and diagnosis. Regarding Completeness DQIs, 191/5069 (3.8%) patients were lost to follow-up.</p><p><strong>Conclusion: </strong>The application of 28 DQIs within the CLARION study has helped with understanding, not only intrinsic and question-specific determinants of data quality, but also tracking the quality of post-authorization safety data obtained from MS registries/data sources, thereby providing a foundation for the regulatory decision-making process.</p>","PeriodicalId":10362,"journal":{"name":"Clinical Epidemiology","volume":null,"pages":null},"PeriodicalIF":3.4,"publicationDate":"2024-10-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11492909/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142459601","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Serum Prealbumin Levels and Risks of Adverse Clinical Outcomes After Ischemic Stroke.","authors":"Mengyao Shi, Xueyu Mao, Xuechun Wu, Min Chu, Huicong Niu, Lulu Sun, Xinyue Chang, Yu He, Yi Liu, Daoxia Guo, Yonghong Zhang, Zhengbao Zhu, Jing Zhao","doi":"10.2147/CLEP.S475408","DOIUrl":"https://doi.org/10.2147/CLEP.S475408","url":null,"abstract":"<p><strong>Background: </strong>Prealbumin is a symbol of protein nutrition and is involved in anti-inflammatory and neuron regeneration, but its association with the prognosis of ischemic stroke remains unclear. We aimed to prospectively explore the associations between serum prealbumin levels and adverse clinical outcomes after ischemic stroke in a large-scale cohort study.</p><p><strong>Methods: </strong>We measured serum prealbumin levels among 6609 ischemic stroke patients admitted at Minhang hospital. The primary outcome was composite of death and major disability (modified Rankin Scale [mRS] score ≥ 3) at 3 months after stroke onset, and secondary outcomes included death and the ordered 7-level categorical score of mRS.</p><p><strong>Results: </strong>During 3 months of follow-up, a total of 2118 patients developed the primary outcome. After multivariable adjustment, high prealbumin levels were associated with a decreased risk of primary outcome (odds ratio, 0.71; 95% CI, 0.59-0.85; <i>P</i> <sub>trend</sub>< 0.0001) when 2 extreme quartiles were compared. Each unit increase of log-transformed prealbumin was associated with a 42% (95% CI, 28-53%) decreased risk of primary outcome. There was a better shift in the distribution of mRS score at 3 months with higher quartiles of serum prealbumin in ischemic stroke patients (<i>P</i> <sub>trend</sub>< 0.0001). Multivariable-adjusted spline regression model showed a linear relationship between prealbumin and the risk of primary outcome (<i>P</i> for linearity = 0.0036).</p><p><strong>Conclusion: </strong>High serum prealbumin level was independently associated with decreased risks of adverse clinical outcomes among ischemic stroke patients. Our findings suggested that prealbumin may be a valuable prognostic biomarker and indicated the importance of keeping nourished in the daily life.</p>","PeriodicalId":10362,"journal":{"name":"Clinical Epidemiology","volume":null,"pages":null},"PeriodicalIF":3.4,"publicationDate":"2024-10-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11471114/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142459603","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Clinical EpidemiologyPub Date : 2024-10-09eCollection Date: 2024-01-01DOI: 10.2147/CLEP.S484335
Frederik Østergaard Klit, Jakob Dal, Stine Linding Andersen, Amar Nikontovic, Peter Vestergaard, Jesper Scott Karmisholt
{"title":"Incidence of Graves' Disease with Validation and Completeness of the Diagnosis for Registry Extracts in the Danish National Patient Register.","authors":"Frederik Østergaard Klit, Jakob Dal, Stine Linding Andersen, Amar Nikontovic, Peter Vestergaard, Jesper Scott Karmisholt","doi":"10.2147/CLEP.S484335","DOIUrl":"https://doi.org/10.2147/CLEP.S484335","url":null,"abstract":"<p><strong>Purpose: </strong>Graves' disease (GD) is one of the most common causes of thyrotoxicosis. It has been proposed to identify incident GD by using the GD-specific code, E05.0, of the 10th revision of the International Classification of Disease (ICD-10) in the Danish National Patient Register (DNPR). We aimed to report the incidence of GD and to investigate the validity and completeness of E05.0 registration using Aalborg University Hospital (AaUH) as a single centre-sample.</p><p><strong>Patients and methods: </strong>The study included registry data from 2020 to 2022. The study population (n=2,893) comprised all people (15-99 years) in the catchment area of AaUH (n=244,872) with either positive anti-thyroid stimulating hormone receptor antibodies (TRAb), or registered with a thyroid disease related ICD-10 code E03.0-E07.9, O99.2 or O90.5 at the Department of Endocrinology, AaUH. To identify incident cases, all subjects occurring for the first time in 2020 were excluded (n=2,339). The incident subjects were categorized into a general practice (n=63) or hospital care group (n=491) and underwent GD verification by biochemical tests and thyroid imaging. Validity was evaluated by positive (PPV) and negative (NPV) predictive values and completeness of E05.0 registration was estimated to the total number of verified GD subjects in hospital care only and in overall (groups combined).</p><p><strong>Results: </strong>One hundred thirty-one incident GD subjects were identified corresponding to an incidence of 26.8 per 100,000/year. E05.0 had a PPV of 90% [95% CI: 81;96] and a NPV of 90% [95% CI: 85;93] to identify incident cases of GD. Completeness was estimated to be 73% [95% CI: 63;82] in hospital care and 50-60% [95% CI: 41;68] in overall.</p><p><strong>Conclusion: </strong>We report on a similar incidence of GD as previous studies in Denmark. Despite a high PPV, incident cases of GD could not adequately be identified by E05.0 in DNPR due to low completeness. Researchers should rely on biochemical test results to identify incident GD.</p>","PeriodicalId":10362,"journal":{"name":"Clinical Epidemiology","volume":null,"pages":null},"PeriodicalIF":3.4,"publicationDate":"2024-10-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11471073/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142459602","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Clinical EpidemiologyPub Date : 2024-10-05eCollection Date: 2024-01-01DOI: 10.2147/CLEP.S481448
Olulade Ayodele, Howard J Cabral, David D McManus, Susan S Jick
{"title":"Risk of Venous Thromboembolism in Statin Users Compared to Fibrate Users in the United Kingdom Clinical Practice Research Datalink (UK CPRD) GOLD.","authors":"Olulade Ayodele, Howard J Cabral, David D McManus, Susan S Jick","doi":"10.2147/CLEP.S481448","DOIUrl":"10.2147/CLEP.S481448","url":null,"abstract":"<p><strong>Background: </strong>A substantial proportion of adults receive statins for treatment of hypercholesterolemia and cardiovascular risk, and statins have been found to improve outcomes in this patient population. However, studies have not consistently demonstrated the potential benefits of statins in preventing venous thromboembolism (VTE). Therefore, we conducted this study to investigate this association.</p><p><strong>Methods: </strong>We conducted a cohort analysis in a study sample comprised of 40-79-year-old patients with hyperlipidemia who received at least one fibrate or statin prescription between January 1995 and December 2018 in the United Kingdom Clinical Practice Research Datalink (CPRD) GOLD. We evaluated the association between statin use and incident unprovoked VTE, compared to fibrate use, an active comparator, using Kaplan-Meier (KM) analysis, Poisson regression (with and without propensity score matching), and inverse probability of treatment weights (IPTW) marginal structural models (MSM).</p><p><strong>Results: </strong>In this cohort of 166,292 patients with hyperlipidemia, 0.81% (N=1,353) developed incident unprovoked VTE. In analyses using the KM method, patients who received statins had a slightly lower risk of VTE compared to those who received fibrates (Log rank test: p=0.0524). The adjusted incident rate ratio (95% CI) for VTE, calculated using Poisson regression, controlling for serum cholesterol and other baseline covariates, in patients prescribed statins compared to fibrates was 0.77 (0.45-1.33) in the full cohort, 0.74 (0.38-1.45) in the propensity score matched analysis, and 0.51 (95% conservative CI: 0.34-0.76) in the IPTW MSM analysis.</p><p><strong>Conclusion: </strong>While the magnitude of effect varied across the different analytic methods, there is consistent evidence for a protective effect of statin use on the occurrence of unprovoked VTE.</p>","PeriodicalId":10362,"journal":{"name":"Clinical Epidemiology","volume":null,"pages":null},"PeriodicalIF":3.4,"publicationDate":"2024-10-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11463176/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142388538","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Clinical EpidemiologyPub Date : 2024-10-04eCollection Date: 2024-01-01DOI: 10.2147/CLEP.S477778
Sarah Cook, David Osborn, Arti Maini, Ravi Parekh, Shamini Gnani, Thomas Beaney, Ana Luisa Neves, Sonia Saxena, Jennifer K Quint
{"title":"Recording of Alcohol Use Disorder in Electronic Health Records: Developing a Recommended Codelist for Research.","authors":"Sarah Cook, David Osborn, Arti Maini, Ravi Parekh, Shamini Gnani, Thomas Beaney, Ana Luisa Neves, Sonia Saxena, Jennifer K Quint","doi":"10.2147/CLEP.S477778","DOIUrl":"https://doi.org/10.2147/CLEP.S477778","url":null,"abstract":"<p><strong>Purpose: </strong>Electronic health records (EHR) are valuable resources for health research; however, their use is challenging. A validated alcohol use disorder (AUD) codelist for UK primary care is needed to improve population-based research in this patient group. We aimed to develop an AUD codelist for use in the Clinical Practice Research Datalink (CPRD) Aurum database, a UK EHR primary-care database.</p><p><strong>Methods: </strong>The CPRD code browser was searched using keywords related to alcohol use using a previously developed search strategy. The resulting codes were categorised as AUD if they were: a) diagnostic of AUD, b) indicated alcohol withdrawal, or c) indicated chronic alcohol-related harm (physical or mental). Codes related to alcohol use but not used to define AUD were also classified into relevant categories (alcohol status, acute harm, and alcohol screening). All codes were categorised independently by at least two reviewers (one person reviewed all codes and five reviewers (all practising GPs) each reviewed a subset of codes (100-200 codes each). Disagreements in categorisation were discussed by at least three coders and a consensus was reached. The reliability of categorisation was assessed using kappa statistics.</p><p><strong>Results: </strong>In total, 556 potential codes related to alcohol use were identified. The Kappa for reliability between coders was moderate for both AUD (0.72) and across all categories (0.62), with substantial variability between coders (AUD: 0.33-0.97; all categories 0.36-0.74). In the final codelist, 138 codes were included as indicating AUD: 38 codes identified which indicated diagnosis of AUD, 14 indicating withdrawal plus 85 codes indicating chronic alcohol-related harm (41 physical health and 44 mental health).</p><p><strong>Conclusion: </strong>Many codes are used in primary care to record alcohol use and associated harms, and there is substantial variability in how clinicians categorise them. While future work formally validating the codelist against gold standard clinical reviews and qualitative work with General Practitioners is needed for a deeper understanding of coding processes, we have documented here the process used for the development of an AUD codelist within primary care which can be used as a reference for future research.</p>","PeriodicalId":10362,"journal":{"name":"Clinical Epidemiology","volume":null,"pages":null},"PeriodicalIF":3.4,"publicationDate":"2024-10-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11460355/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142388537","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Clinical EpidemiologyPub Date : 2024-10-02eCollection Date: 2024-01-01DOI: 10.2147/CLEP.S467874
Frantisek Zitricky, Anni Koskinen, Kristina Sundquist, Jan Sundquist, Vaclav Liska, Asta Försti, Akseli Hemminki, Kari Hemminki
{"title":"Survival in Thyroid Cancer in Sweden From 1999 To 2018.","authors":"Frantisek Zitricky, Anni Koskinen, Kristina Sundquist, Jan Sundquist, Vaclav Liska, Asta Försti, Akseli Hemminki, Kari Hemminki","doi":"10.2147/CLEP.S467874","DOIUrl":"10.2147/CLEP.S467874","url":null,"abstract":"<p><strong>Introduction: </strong>Thyroid cancer (TC) is diagnosed in several histological types which differ in their clinical characteristics and survival. We aim to describe how they influence TC survival in Sweden.</p><p><strong>Methods: </strong>Cancer data were obtained from the Swedish cancer registry between years 1999 and 2018, and these were used to analyze relative survival.</p><p><strong>Results: </strong>Relative survival for all TC improved when analyzed in 10-year periods, and female survival improved more than male survival. Female survival advantage appeared to be present also for specific histological types, although case numbers were low for rare types. Female 5-year relative survival for TC was 100% for follicular, 95.1% for oncocytic, 93.4% for papillary, 89.7% for medullary, and 6.1% for anaplastic cancer. Among the clinical TNM classes, only T4 and M1 stages were associated with decreased survival compared to T1-3 and M0. Anaplastic cancer presented most often at high T and M1 stages, in contrast to other TC. Curiously, the diagnostic age for anaplastic M1 patients was lower than that for M0 patients. Both anaplastic and medullary cancers did not show age-dependent increases in the probability of metastases, in contrast to the main histological types. This could indicate the presence of several types of anaplastic and medullary cancers.</p><p><strong>Conclusion: </strong>The poor survival for anaplastic TC is an extreme contrast to the excellent survival of differentiated TC. As less than 20% of anaplastic cancer patients survived one year, urgent diagnosis and initiation of treatment are important. Facilitated treatment pathways have been instituted in Denmark resulting in improved survival. Anaplastic cancer should be a target of a major research focus.</p>","PeriodicalId":10362,"journal":{"name":"Clinical Epidemiology","volume":null,"pages":null},"PeriodicalIF":3.4,"publicationDate":"2024-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11456301/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142380187","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Clinical EpidemiologyPub Date : 2024-09-27eCollection Date: 2024-01-01DOI: 10.2147/CLEP.S494770
Georgie M Massen, Jennifer K Quint
{"title":"Using Routinely Collected Electronic Healthcare Record Data to Investigate Fibrotic Multimorbidity in England [Response to Letter].","authors":"Georgie M Massen, Jennifer K Quint","doi":"10.2147/CLEP.S494770","DOIUrl":"10.2147/CLEP.S494770","url":null,"abstract":"","PeriodicalId":10362,"journal":{"name":"Clinical Epidemiology","volume":null,"pages":null},"PeriodicalIF":3.4,"publicationDate":"2024-09-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11444052/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142361232","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}