Abstract:
OBJECTIVE:We examined the association between lifestyle factors and menstrual cycle characteristics among nulliparous Danish women aged 18-40 years who were participating in an Internet-based prospective cohort study of pregnancy planners. METHODS:We used cross-sectional data collected at baseline to assess the association of age, body mass index (BMI), physical activity, alcohol and caffeine consumption, and smoking with the prevalence of irregular cycles, short (≤25 days) and long (≥33 days) cycles, and duration and amount of menstrual flow. We used log-binomial and multinomial logistic regression to estimate prevalence ratios and 95% confidence intervals. RESULTS:Low physical activity and heavy alcohol consumption were associated with an increased prevalence of irregular periods. High BMI, smoking, and caffeine and alcohol consumption were related to an increased prevalence of short menstrual cycles and heavy menstrual bleeding. Women in their mid-to-late thirties had shorter and lighter menstrual flow, but a lower prevalence of irregular cycles, compared with women 18-25 years of age. DISCUSSION:In this study, increased age, high BMI, and sedentary behavior were associated with menstrual-pattern irregularities. These factors may influence the balance and level of endogenous hormones conducive to optimal menstrual function.
journal_name
Clin Epidemioljournal_title
Clinical epidemiologyauthors
Hahn KA,Wise LA,Riis AH,Mikkelsen EM,Rothman KJ,Banholzer K,Hatch EEdoi
10.2147/CLEP.S46712subject
Has Abstractpub_date
2013-08-19 00:00:00pages
311-9issn
1179-1349pii
clep-5-311journal_volume
5pub_type
杂志文章abstract::Characterizing the relations between exposures and diseases is the central tenet of epidemiology. Researchers may want to evaluate exposure-disease causation by assessing whether the disease under concern is induced by the various exposures - the so-called "attribution". In this paper, the authors propose a method to ...
journal_title:Clinical epidemiology
pub_type: 杂志文章
doi:10.2147/CLEP.S160205
更新日期:2018-04-27 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:Objective:Reports on the epidemiology of vestibular schwannoma (VS) indicate an increase in diagnosed cases, often based on selected materials over a limited period of time. This report presents prospective 40-year epidemiological data from an unselected national cohort of all patients diagnosed with a VS in Denmark si...
journal_title:Clinical epidemiology
pub_type: 杂志文章
doi:10.2147/CLEP.S218670
更新日期:2019-11-08 00:00:00
abstract:Background:The Swedish Quality Register for Inflammatory Bowel Disease (SWIBREG) contains clinical data for the study of inflammatory bowel disease (IBD). The Epidemiology Strengthened by histoPathology Reports in Sweden (ESPRESSO) cohort was recently established for the study of gastrointestinal histopathology. We aim...
journal_title:Clinical epidemiology
pub_type: 杂志文章
doi:10.2147/CLEP.S265404
更新日期:2020-10-09 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:A number of studies have shown poorer survival among cancer patients with comorbidity. Several mechanisms may underlie this finding. In this review we summarize the current literature on the association between patient comorbidity and cancer prognosis. Prognostic factors examined include tumor biology, diagn...
journal_title:Clinical epidemiology
pub_type: 杂志文章,评审
doi:10.2147/CLEP.S47150
更新日期:2013-11-01 00:00:00
abstract:BACKGROUND:The Danish National Registry of Patients (DNRP) is a potentially valuable resource for monitoring national trends in the use of chemotherapy and evaluating the benefits and harms of alternative treatments among colorectal cancer (CRC) patients in Denmark. However, the validity of chemotherapy reporting in th...
journal_title:Clinical epidemiology
pub_type: 杂志文章
doi:10.2147/CLEP.S49773
更新日期:2013-08-30 00:00:00
abstract::Introduction: Spontaneous (non-traumatic) subarachnoid hemorrhage (ntSAH) is frequently suspected in the emergency department, but the incidence rate is low. Diagnosis registers can provide valuable data for research in uncommon conditions like ntSAH. Unfortunately, validity vary in the registers. We aimed to assess t...
journal_title:Clinical epidemiology
pub_type: 杂志文章
doi:10.2147/CLEP.S197251
更新日期:2019-05-01 00:00:00
abstract:Purpose:Synthetic oxytocin for labor augmentation during birth has been linked to negative neurodevelopment effects in children. We examined whether maternal labor augmentation was associated with lower cognitive ability in young adulthoods. Patients and methods:We identified 330,107 individuals (96.6% were men), with...
journal_title:Clinical epidemiology
pub_type: 杂志文章
doi:10.2147/CLEP.S181012
更新日期:2018-11-26 00:00:00
abstract:OBJECTIVE:The Department of Hematology, Zealand University Hospital, Denmark, and the National Institute of Public Health, University of Southern Denmark, created the first nationwide, population-based, and the most comprehensive cross-sectional health-related quality of life (HRQoL) survey of patients with myeloprolif...
journal_title:Clinical epidemiology
pub_type: 杂志文章
doi:10.2147/CLEP.S117587
更新日期:2017-03-02 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:BACKGROUND:Assessment of psychosocial functioning in people with schizophrenia is important. The Global Assessment of Functioning (GAF-F) scale represents a widely applied, easy, and quick tool, but its validity and reliability have been debated. The aim was to investigate whether GAF-F scores are associated with other...
journal_title:Clinical epidemiology
pub_type: 杂志文章
doi:10.2147/CLEP.S109036
更新日期:2016-09-02 00:00:00
abstract:Background:Association between psoriasis severity and cerebro- and cardiovascular comorbidities has rarely been investigated. Aim:We aimed to investigate differences in cerebro- and cardiovascular comorbidities by psoriasis severity. Materials and methods:Using Swedish nationwide health-care registers, new adult user...
journal_title:Clinical epidemiology
pub_type: 杂志文章
doi:10.2147/CLEP.S164918
更新日期:2018-06-19 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:INTRODUCTION:Smoking is a main risk factor for morbidity and mortality in people living with human immunodeficiency virus (PLHIV), but its potential association with renal impairment remains to be established. METHODS:We did a nationwide population-based cohort study in Danish PLHIV to evaluate the association between...
journal_title:Clinical epidemiology
pub_type: 杂志文章
doi:10.2147/CLEP.S83530
更新日期:2015-08-28 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: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:BACKGROUND:Administrative data may be useful for epidemiological studies of chronic idiopathic thrombocytopenic purpura (ITP). However, the quality of the recorded diagnoses needs evaluation. AIM:We evaluated the validity in predicting chronic ITP of the International Classification of Diseases (ICD)-10 diagnoses of I...
journal_title:Clinical epidemiology
pub_type: 杂志文章
doi:10.2147/clep.s4832
更新日期:2009-08-09 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:AIM OF DATABASE:The Danish Nonmelanoma Skin Cancer Dermatology Database was established in 2008. The aim of this database was to collect data on nonmelanoma skin cancer (NMSC) treatment and improve its treatment in Denmark. NMSC is the most common malignancy in the western countries and represents a significant challen...
journal_title:Clinical epidemiology
pub_type: 杂志文章,评审
doi:10.2147/CLEP.S99464
更新日期:2016-10-25 00:00:00
abstract:BACKGROUND:With the emergence of new lipid-lowering therapies, more patients are expected to achieve substantial lowering of low-density lipoprotein cholesterol (LDL-C). However, there are limited data examining the clinical experience of patients with low (<1.3 mmol/L) or very low (<0.65 mmol/L) levels of LDL-C. To pr...
journal_title:Clinical epidemiology
pub_type: 杂志文章
doi:10.2147/CLEP.S77676
更新日期:2015-02-26 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:AIM OF THE DATABASE:The main purpose of the database of the Danish Renal Cancer Group (DaRenCaData) is to improve the quality of renal cancer treatment in Denmark and secondarily to conduct observational research. STUDY POPULATION:DaRenCaData includes all Danish patients with a first-time diagnosis of renal cancer in ...
journal_title:Clinical epidemiology
pub_type: 杂志文章,评审
doi:10.2147/CLEP.S106042
更新日期:2016-10-25 00:00:00
abstract:OBJECTIVES:Translational epidemiology studies often use archived tumor specimens to evaluate genetic hypotheses involving cancer outcomes. When the exposure of interest is a germline polymorphism, a key concern is whether the genotype assayed from tumor-derived DNA is representative of the germline. We evaluated the co...
journal_title:Clinical epidemiology
pub_type: 杂志文章
doi:10.2147/CLEP.S13811
更新日期:2010-10-22 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
abstract:Purpose:To identify the characteristics and initial disease severity of patients with nonalcoholic fatty liver disease (NAFLD) and assess incidence and risk factors for disease progression in a retrospective study. Methods:Patients ≥18 years of age without alcoholism or other liver diseases (eg, hepatitis B/C) were se...
journal_title:Clinical epidemiology
pub_type: 杂志文章
doi:10.2147/CLEP.S144368
更新日期:2017-12-14 00:00:00
abstract:BACKGROUND:Comorbidity indices summarize complex medical histories into concise ordinal scales, facilitating stratification and regression in epidemiologic analyses. Low subject prevalence in the highest strata of a comorbidity index often prompts combination of upper categories into a single stratum ('collapsing'). O...
journal_title:Clinical epidemiology
pub_type: 杂志文章
doi:10.2147/clep.s5757
更新日期:2009-08-09 00:00:00
abstract:BACKGROUND:Primary hyperparathyroidism (pHPT) is associated with an increased risk of developing breast cancer, but little is known about the underlying factors. The aim of this study was to compare women with a history of pHPT and a reference population in terms of standard factors predictive of prognosis and response...
journal_title:Clinical epidemiology
pub_type: 杂志文章
doi:10.2147/CLEP.S17298
更新日期:2011-03-25 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: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