Abstract:
:Background: The Swedish National Patient Registry (NPR) is a nationwide registry that is used extensively for epidemiological research. Using the NPR, we recently found a recurrent pregnancy loss (RPL) incidence of 650/100,000 (0.65%) pregnant women in Sweden. It is of great importance that the quality of the coding is good and reliable in order to use NPR data for research. To specifically study RPL in Sweden, a general validation of this diagnosis in the NPR is needed. Objective: To validate the diagnosis of RPL, defined as ≥3 consecutive miscarriages before 22 gestational weeks, recorded in the NPR and assess how registered miscarriages were verified clinically (ultrasound or urine/serum hCG) by reviewing the medical records. Materials and methods: In a cohort of 6,852 women diagnosed with RPL in Sweden, during 2003-2012, a total of 238 complete medical records from 38 hospitals were reviewed. A power calculation estimated that 228 medical records had to be reviewed for a positive predictive value (PPV) of 85% (95% CI) with a power of 90%. The ICD-10 diagnoses used for RPL were N96.9 and O26.2. Results: The diagnosis of RPL was confirmed in 202 out of 238 medical records resulting in a PPV of 85% (95% CI 78-89%) out of which 59% were verified with ultrasound whereas 35% were verified only by urine/serum hCG. Conclusion: The Swedish NPR is a valuable tool for epidemiological research. We found a high PPV of RPL in the NPR, supporting the use of these data for future research.
journal_name
Clin Epidemioljournal_title
Clinical epidemiologyauthors
Rasmark Roepke E,Christiansen OB,Hansson SRdoi
10.2147/CLEP.S199206subject
Has Abstractpub_date
2019-05-08 00:00:00pages
375-381issn
1179-1349pii
199206journal_volume
11pub_type
杂志文章abstract:Purpose:Obesity is an established risk factor for venous thromboembolism (VTE), while studies on physical inactivity and VTE risk show conflicting results. We examined whether physical activity modified the association between obesity and VTE. Patients and Methods:We conducted a population-based cohort study by combin...
journal_title:Clinical epidemiology
pub_type: 杂志文章
doi:10.2147/CLEP.S275079
更新日期:2020-12-08 00:00:00
abstract:Objective:To determine the association of individual antidepressants (ADs) with the risk of traumatic brain injury (TBI) in the elderly. Patients and methods:We conducted a case-control study nested in a cohort of new users of ADs aged ≥65 years, identified in the German Pharmacoepidemiological Research Database durin...
journal_title:Clinical epidemiology
pub_type: 杂志文章
doi:10.2147/CLEP.S173667
更新日期:2019-02-15 00:00:00
abstract:BACKGROUND:Although hypertrophic scar (HTS) formation following cleft lip repair is relatively common, published rates vary widely, from 1% to nearly 50%. The risk factors associated with HTS formation in cleft patients are not well characterized. The primary aim of this retrospective study of 180 cleft lip repairs is ...
journal_title:Clinical epidemiology
pub_type: 杂志文章
doi:10.2147/CLEP.S31119
更新日期:2012-01-01 00:00:00
abstract:OBJECTIVE:In medicine, many more prediction models have been developed than are implemented or used in clinical practice. These models cannot be recommended for clinical use before external validity is established. Though various models to predict mortality in dialysis patients have been published, very few have been v...
journal_title:Clinical epidemiology
pub_type: 杂志文章
doi:10.2147/CLEP.S139748
更新日期:2017-09-05 00:00:00
abstract:AIM OF DATABASE:The aim of the Danish Anaesthesia Database (DAD) is the nationwide collection of data on all patients undergoing anesthesia. Collected data are used for quality assurance, quality development, and serve as a basis for research projects. STUDY POPULATION:The DAD was founded in 2004 as a part of Danish C...
journal_title:Clinical epidemiology
pub_type: 杂志文章,评审
doi:10.2147/CLEP.S99517
更新日期:2016-10-25 00:00:00
abstract::Sjögren's syndrome is a chronic systemic autoimmune disease characterized by lymphocytic infiltration of exocrine glands. It can present as an entity by itself, primary Sjögren's syndrome (pSS), or in addition to another autoimmune disease, secondary Sjögren's syndrome (sSS). pSS has a strong female propensity and is ...
journal_title:Clinical epidemiology
pub_type: 杂志文章,评审
doi:10.2147/CLEP.S47399
更新日期:2014-07-30 00:00:00
abstract:Purpose:This paper aims to compare the clinical effectiveness of oral anti-osteoporosis drugs based on the observed risk of fracture while on treatment in primary care actual practice. Materials and methods:We investigated two primary care records databases covering UK National Health Service (Clinical Practice Resear...
journal_title:Clinical epidemiology
pub_type: 杂志文章
doi:10.2147/CLEP.S164112
更新日期:2018-10-09 00:00:00
abstract::The Danish health care system provides partial reimbursement of most prescription medications in Denmark. The dispensation of prescription medications is registered in administrative databases. Each time a prescription is redeemed at a pharmacy, an electronic record is generated with information related to the user, p...
journal_title:Clinical epidemiology
pub_type: 杂志文章
doi:10.2147/CLEP.S37587
更新日期:2012-01-01 00:00:00
abstract:Background:Sentinel lymph node biopsy (SLNB) was introduced over 30 years ago, but the application of SLNB in China is unclear. This study aimed to explore the real-world implementation of SLNB among early-stage breast cancer patients in China. Methods:A multi-center, retrospective study was conducted among primary br...
journal_title:Clinical epidemiology
pub_type: 杂志文章
doi:10.2147/CLEP.S264349
更新日期:2020-09-01 00:00:00
abstract:Purpose:Substantial heterogeneity exists in reported kidney function decline in pre-dialysis chronic kidney disease (CKD). By design, kidney function decline can be studied in CKD 3-5 cohorts or dialysis-based studies. In the latter, patients are selected based on the fact that they initiated dialysis, possibly leading...
journal_title:Clinical epidemiology
pub_type: 杂志文章
doi:10.2147/CLEP.S153367
更新日期:2018-05-25 00:00:00
abstract:PURPOSE:Lifestyle factors may influence observed associations between proton pump inhibitor (PPI) usage and health outcomes. The aim of the study reported here was to examine characteristics and differences in lifestyle among PPI users and nonusers. METHODS:This cross-sectional study utilized data from a 2006 populati...
journal_title:Clinical epidemiology
pub_type: 杂志文章
doi:10.2147/CLEP.S49354
更新日期:2013-12-04 00:00:00
abstract:Purpose:Apolipoproteins C-I, C-II, C-III and E have been associated with risk of arterial thrombotic diseases. We investigated whether these apolipoproteins have prothrombotic properties and are associated with risk of venous thromboembolism (VTE). Patients and methods:A total of 127 VTE patients and 299 controls were...
journal_title:Clinical epidemiology
pub_type: 杂志文章
doi:10.2147/CLEP.S196266
更新日期:2019-07-22 00:00:00
abstract:BACKGROUND:Data on the safety of selective serotonin-reuptake inhibitors (SSRIs) in pregnancy are inconsistent. We examined associations between SSRI use during early pregnancy and risk of congenital malformations in infants. METHODS:Set in Northern Denmark, our population-based prevalence study included 216,042 women...
journal_title:Clinical epidemiology
pub_type: 杂志文章
doi:10.2147/clep.s9256
更新日期:2010-08-09 00:00:00
abstract:BACKGROUND:Physical activity (PA) and its relationship with all-cause mortality suggest a strong and consistent inverse association. This study prospectively investigated the association between PA level and mortality among participants of the Norwegian Women and Cancer (NOWAC) Study. METHODS:A total of 66,136 NOWAC p...
journal_title:Clinical epidemiology
pub_type: 杂志文章
doi:10.2147/CLEP.S22681
更新日期:2011-01-01 00:00:00
abstract:Purpose:Anemia is prevalent in patients with chronic kidney disease (CKD), but the longitudinal risk of anemia in patients with newly identified CKD is unknown. We therefore examined the risks of experiencing anemia in persons with newly identified CKD. Patients and Methods:This cohort study included adult patients wi...
journal_title:Clinical epidemiology
pub_type: 杂志文章
doi:10.2147/CLEP.S259648
更新日期:2020-09-11 00:00:00
abstract:Objective:To investigate the impact of moderate wine consumption on the risk of prostate cancer (PCa). We focused on the differential effect of moderate consumption of red versus white wine. Design:This study was a meta-analysis that includes data from case-control and cohort studies. Materials and methods:A systemat...
journal_title:Clinical epidemiology
pub_type: 杂志文章,评审
doi:10.2147/CLEP.S163668
更新日期:2018-04-17 00:00:00
abstract:BACKGROUND:Data from the Nordic health care registers have been of great value in perinatal epidemiological research. It has been assumed that findings from the Nordic population (Denmark, Finland, Iceland, Norway, and Sweden) are applicable to other populations as well, including the population of the US. OBJECTIVE:T...
journal_title:Clinical epidemiology
pub_type: 杂志文章
doi:10.2147/CLEP.S106126
更新日期:2016-08-03 00:00:00
abstract:Purpose:Former studies have suggested that women with Crohn's disease (CD) and ulcerative colitis (UC) have a decreased chance of a live born child after assisted reproductive technology (ART) treatment. It is debated whether corticosteroids before ART may improve outcomes, either by decreasing inflammatory bowel disea...
journal_title:Clinical epidemiology
pub_type: 杂志文章
doi:10.2147/CLEP.S234996
更新日期:2020-03-23 00:00:00
abstract:Background:The combination of organized cervical cancer screening and childhood HPV vaccination programs has the potential to eliminate cervical cancer in the future. However, only women participating in both programs gain the full protection, and combined non-attenders remain at high risk of developing cervical cancer...
journal_title:Clinical epidemiology
pub_type: 杂志文章
doi:10.2147/CLEP.S203023
更新日期:2019-11-08 00:00:00
abstract:Purpose:To validate the use of International Classification of Diseases, Tenth Revision, Clinical Modification (ICD-10-CM) codes to identify patients with chronic hepatitis B virus (HBV) and hepatitis C virus (HCV) infection in the Taiwan National Health Insurance (NHI) Outpatient Claims Dataset. Methods:We conducted ...
journal_title:Clinical epidemiology
pub_type: 杂志文章
doi:10.2147/CLEP.S236823
更新日期:2020-02-20 00:00:00
abstract:AIM OF DATABASE:The aim of the Danish Heart Failure Registry (DHFR) is to monitor and improve the care of patients with incident heart failure (HF) in Denmark. STUDY POPULATION:The DHFR includes inpatients and outpatients (≥18 years) with incident HF. Reporting to the DHFR is mandatory for the Danish hospital departme...
journal_title:Clinical epidemiology
pub_type: 杂志文章,评审
doi:10.2147/CLEP.S99504
更新日期:2016-10-25 00:00:00
abstract:Background:Hydroxychloroquine and chloroquine may reduce the risk of cancer as they inhibit autophagy, in particular, in people with connective tissue diseases. Methods:The hazard ratios of cancers, metastases, and death were assessed in adults with connective tissue diseases prescribed hydroxychloroquine/chloroquine ...
journal_title:Clinical epidemiology
pub_type: 杂志文章
doi:10.2147/CLEP.S143563
更新日期:2017-11-03 00:00:00
abstract:BACKGROUND:A number of population-based studies have demonstrated lower cancer survival in elderly patients than among middle-aged or younger patients. Also, data quality in cancer registries has been shown to be associated with age. The objective of this study was to examine the recent age-specific cancer survival tre...
journal_title:Clinical epidemiology
pub_type: 杂志文章
doi:10.2147/CLEP.S87699
更新日期:2015-07-29 00:00:00
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journal_title:Clinical epidemiology
pub_type: 杂志文章
doi:10.2147/CLEP.S139895
更新日期:2017-08-17 00:00:00
abstract:Aim:To improve consistency between register studies in Sweden and ensure valid comparisons of possible changes in alcohol-related disorders and diseases (ARDDs) over time, we propose a definition of ARDDs. Based on this definition, we examined Sweden's incidence rates of ARDDs from 1970 to 2018 in non-primary healthcar...
journal_title:Clinical epidemiology
pub_type: 杂志文章
doi:10.2147/CLEP.S285936
更新日期:2020-12-31 00:00:00
abstract:AIM:In 2008, the Danish National Chronic Lymphocytic Leukemia Registry was founded within the Danish National Hematology Database. The primary aim of the registry is to assure quality of diagnosis and care of patients with chronic lymphocytic leukemia (CLL) in Denmark. Secondarily, to evaluate adherence to national gui...
journal_title:Clinical epidemiology
pub_type: 杂志文章,评审
doi:10.2147/CLEP.S99486
更新日期:2016-10-25 00:00:00
abstract:BACKGROUND:Osteonecrosis of the jaw (ONJ) is an adverse effect of drugs that suppress bone turnover - for example, drugs used for the treatment of postmenopausal osteoporosis. The Danish National Registry of Patients (DNRP) is potentially valuable for monitoring ONJ and its prognosis; however, no specific code for ONJ ...
journal_title:Clinical epidemiology
pub_type: 杂志文章
doi:10.2147/CLEP.S45226
更新日期:2013-08-01 00:00:00
abstract:Background:The presence of comorbid medical conditions can significantly affect a cancer patient's treatment options, quality of life, and survival. However, these important data are often lacking from population-based cancer registries. Leveraging routine linkage to hospital discharge data, a comorbidity score was cal...
journal_title:Clinical epidemiology
pub_type: 杂志文章
doi:10.2147/CLEP.S146395
更新日期:2017-11-20 00:00:00
abstract:OBJECTIVE:Invasive bladder cancer (IBC) is a common urological malignancy accounting for 4%-5% of all cancers in Denmark. Our aim was to examine possible changes in short- and long-term survival of patients with IBC during 1998-2009. STUDY DESIGN AND SETTING:Data on all patients (N = 4032) with an incident diagnosis o...
journal_title:Clinical epidemiology
pub_type: 杂志文章
doi:10.2147/CLEP.S20615
更新日期:2011-01-01 00:00:00
abstract::Routinely-collected health data (RCD) are now used for a wide range of studies, including observational studies, comparative effectiveness research, diagnostics, studies of adverse effects, and predictive analytics. At the same time, limitations inherent in using data collected without specific a priori research quest...
journal_title:Clinical epidemiology
pub_type: 杂志文章
doi:10.2147/CLEP.S110528
更新日期:2016-10-19 00:00:00