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  1. Article ; Online: Matters Arising

    Daniel Mølager Christensen / Gunnar Gislason / Thomas Gerds

    npj Digital Medicine, Vol 5, Iss 1, Pp 1-

    Immortal time bias in the analysis of drug prescription trajectories

    2022  Volume 2

    Keywords Computer applications to medicine. Medical informatics ; R858-859.7
    Language English
    Publishing date 2022-12-01T00:00:00Z
    Publisher Nature Portfolio
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  2. Article ; Online: Matters Arising: Immortal time bias in the analysis of drug prescription trajectories.

    Christensen, Daniel Mølager / Gislason, Gunnar / Gerds, Thomas

    NPJ digital medicine

    2022  Volume 5, Issue 1, Page(s) 190

    Language English
    Publishing date 2022-12-23
    Publishing country England
    Document type Letter
    ISSN 2398-6352
    ISSN (online) 2398-6352
    DOI 10.1038/s41746-022-00722-6
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  3. Article ; Online: High-risk admission prior to transcatheter aortic valve replacement and subsequent outcomes.

    Strange, Jarl Emanuel / Nouhravesh, Nina / Schou, Morten / Christensen, Daniel Mølager / Holt, Anders / Østergaard, Lauge / Køber, Lars / Olesen, Jonas Bjerring / Fosbøl, Emil Loldrup

    American heart journal

    2023  Volume 268, Page(s) 53–60

    Abstract: Background: Severe, symptomatic aortic stenosis may cause heart failure, acute myocardial infarction, or syncope; limited data exist on the occurrence of such events before transcatheter aortic valve replacement (TAVR) and their impact on subsequent ... ...

    Abstract Background: Severe, symptomatic aortic stenosis may cause heart failure, acute myocardial infarction, or syncope; limited data exist on the occurrence of such events before transcatheter aortic valve replacement (TAVR) and their impact on subsequent outcomes. Thus, we investigated the association between a preceding event and outcomes after TAVR.
    Methods: From 2014 to 2021 all Danish patients who underwent TAVR were included. Preceding events up to 180 days before TAVR were identified. A preceding event was defined as a hospitalization for heart failure, acute myocardial infarction, or syncope. The 1-year risk of all-cause death, and cardiovascular or all-cause hospitalization was compared for patients with versus without a preceding event using Kaplan-Meier, Aalen-Johansen, and in Cox regression analyses adjusted for patient characteristics.
    Results: Of 5,851 patients included, 759 (13.0%) had a preceding event. The median age was 81 years in both groups. Male sex and frailty were more prevalent in patients with a preceding event (males: 64.7% vs 55.2%, frailty: 49.6% vs 40.6%). The most common type of preceding event was a hospitalization for heart failure (n = 524). For patients with a preceding event, the 1-year risk of death was 11.7% (95% CI: 9.4%-14.1%) versus 8.0% (95% CI: 7.2%-8.7%) for patients without. The corresponding adjusted hazard ratio (aHR) was 1.29 (95%CI: 1.01-1.64). Mortality was highest for patients with a preceding event of a heart failure admission (1-year risk: 13.5% [95%CI: 10.5%-16.5%]). Comparing patients with a preceding event to those without, the 1-year risk for cardiovascular rehospitalization was 15.0% versus 8.2% (aHR 1.60 [95%CI: 1.29-1.99]) and 57.6% versus 50.6% for all-cause rehospitalization (aHR 1.08 [95%CI: 0.87-1.20]).
    Conclusions: A hospitalization for heart failure, myocardial infarction, or syncope prior to TAVR was associated with a poorer prognosis and could represent a group to focus resource management on. Interventions to prevent preceding events and improvements in pre- and post-TAVR optimization of these patients are warranted.
    MeSH term(s) Humans ; Male ; Aged, 80 and over ; Transcatheter Aortic Valve Replacement/adverse effects ; Aortic Valve Stenosis/complications ; Aortic Valve Stenosis/surgery ; Frailty ; Treatment Outcome ; Hospitalization ; Heart Failure/etiology ; Myocardial Infarction/etiology ; Syncope/etiology ; Risk Factors ; Aortic Valve/surgery
    Language English
    Publishing date 2023-11-14
    Publishing country United States
    Document type Journal Article
    ZDB-ID 80026-0
    ISSN 1097-6744 ; 0002-8703
    ISSN (online) 1097-6744
    ISSN 0002-8703
    DOI 10.1016/j.ahj.2023.11.003
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  4. Article ; Online: Short- and Long-Term Mortality for Patients With and Without a Cancer Diagnosis Following Pulmonary Embolism in Denmark, 2000 to 2020: A Nationwide Study.

    Madsen, Sophie Fredslund / Christensen, Daniel Mølager / Strange, Jarl Emanuel / Nouhravesh, Nina / Kümler, Thomas / Gislason, Gunnar / Lamberts, Morten / Sindet-Pedersen, Caroline

    Journal of the American Heart Association

    2023  Volume 12, Issue 23, Page(s) e030191

    Abstract: Background: New treatment regimens have been introduced in the past 20 years, which may influence the short- and long-term prognosis for patients with and without a cancer diagnosis following pulmonary embolism. However, newer studies investigating ... ...

    Abstract Background: New treatment regimens have been introduced in the past 20 years, which may influence the short- and long-term prognosis for patients with and without a cancer diagnosis following pulmonary embolism. However, newer studies investigating these trends are lacking. Therefore, we aimed to investigate the 30- and 31- to 365-day mortality following pulmonary embolism.
    Methods and results: Using the Danish nationwide registries, patients with a diagnosis of pulmonary embolism between 2000 and 2020 were included. Age- and sex-standardized 30- and 31- to 365-day mortality was calculated and stratified by cancer status. In total, 60 614 patients (29.6% with recent cancer; mean age, 68.2 years) were included. The 30-day mortality for patients with no recent cancer decreased from 19.1% (95% CI, 17.9%-20.4%) in 2000 to 7.3% (95% CI, 6.7%-8.0%) in 2018 to 2020 (hazard ratio [HR], 0.36 [95% CI, 0.32-0.40];
    Conclusions: From 2000 to 2020, improvements were observed in 30-day mortality following pulmonary embolism regardless of cancer status. For patients with recent cancer, 31- to 365-day mortality did not improve, whereas a minor improvement was observed for patients without recent cancer.
    MeSH term(s) Humans ; Aged ; Pulmonary Embolism/diagnosis ; Proportional Hazards Models ; Prognosis ; Denmark/epidemiology ; Neoplasms/diagnosis
    Language English
    Publishing date 2023-11-28
    Publishing country England
    Document type Journal Article
    ZDB-ID 2653953-6
    ISSN 2047-9980 ; 2047-9980
    ISSN (online) 2047-9980
    ISSN 2047-9980
    DOI 10.1161/JAHA.123.030191
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  5. Article ; Online: Protective association of angiotensin blockade with influenza: a result of immortal time bias?

    Christensen, Daniel Mølager / Gerds, Thomas / Gislason, Gunnar / Torp-Pedersen, Christian

    European heart journal. Cardiovascular pharmacotherapy

    2020  Volume 7, Issue 3, Page(s) e58–e59

    MeSH term(s) Angiotensins/antagonists & inhibitors ; Humans ; Influenza, Human/prevention & control ; Time Factors
    Chemical Substances Angiotensins
    Language English
    Publishing date 2020-06-10
    Publishing country England
    Document type Letter
    ZDB-ID 2808613-2
    ISSN 2055-6845 ; 2055-6837
    ISSN (online) 2055-6845
    ISSN 2055-6837
    DOI 10.1093/ehjcvp/pvaa068
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  6. Article ; Online: Age- and sex-specific trends in the incidence of myocardial infarction in Denmark, 2005 to 2021.

    Christensen, Daniel Mølager / Strange, Jarl Emanuel / Phelps, Matthew / Schjerning, Anne-Marie / Sehested, Thomas S G / Gerds, Thomas / Gislason, Gunnar

    Atherosclerosis

    2022  Volume 346, Page(s) 63–67

    Abstract: Background and aims: Few studies have determined whether the declining incidence of myocardial infarction carries into the current decade, and how it is affected by age and sex. We aimed to determine age- and sex-specific changes in myocardial ... ...

    Abstract Background and aims: Few studies have determined whether the declining incidence of myocardial infarction carries into the current decade, and how it is affected by age and sex. We aimed to determine age- and sex-specific changes in myocardial infarction incidence in Denmark from 2005 through 2021.
    Methods: First-time myocardial infarction admissions in adults aged ≥18 years were identified through Danish nationwide registries. Incidence rates per 100,000 persons with 95% confidence intervals (CI) were calculated across calendar year, sex, and age groups (≤49, 50-69, 70-84, ≥85 years). We also presented incidence rate ratios (IRR) with 95% CIs for 2019-2021 compared to 2005-2007.
    Results: From January 1, 2005, through August 4, 2021, there were 116,481 incident acute myocardial infarctions in approximately 4.5 million Danes aged ≥18 years. Overall incidence rate of myocardial infarction per 100,000 persons decreased in both sexes from 2005 through 2021 (females: 143 to 80; males: 243 to 174) and across all age groups. The steepest declines in incidence were observed for ages ≥85 years (males: 55%, IRR: 0.45 [0.41-0.49]; females: 58%, IRR: 0.42 [0.39-0.45]) and 70-84 years (males: 46%, IRR: 0.54 [0.52-0.57]; females: 52%, IRR: 0.48 [0.46-0.51]). Rates also declined significantly for ages 50-69 (males: 19%, IRR: 0.81 [0.79-0.84]; females: 17%, IRR: 0.83 [0.78-0.88]) and ≥49 years (males: 30%, IRR: 0.70 [0.64-0.76]; females: 37%, IRR: 0.63 [0.54-0.74]).
    Conclusions: Declines in the incidence of myocardial infarction continued into the current decade across age groups and sex. However, significantly steeper absolute and relative declines were observed among the oldest age groups (≥70 years).
    MeSH term(s) Adolescent ; Adult ; Aged ; Aged, 80 and over ; Denmark/epidemiology ; Female ; Hospitalization ; Humans ; Incidence ; Male ; Middle Aged ; Myocardial Infarction/epidemiology ; Registries
    Language English
    Publishing date 2022-03-03
    Publishing country Ireland
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 80061-2
    ISSN 1879-1484 ; 0021-9150
    ISSN (online) 1879-1484
    ISSN 0021-9150
    DOI 10.1016/j.atherosclerosis.2022.03.003
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  7. Article ; Online: Frailty and Recurrent Hospitalization After Transcatheter Aortic Valve Replacement.

    Strange, Jarl Emanuel / Christensen, Daniel Mølager / Sindet-Pedersen, Caroline / Schou, Morten / Falkentoft, Alexander Christian / Østergaard, Lauge / Butt, Jawad Haider / Graversen, Peter Laursen / Køber, Lars / Gislason, Gunnar / Olesen, Jonas Bjerring / Fosbøl, Emil Loldrup

    Journal of the American Heart Association

    2023  Volume 12, Issue 8, Page(s) e029264

    Abstract: Background For frail patients with limited life expectancy, time in hospital following transcatheter aortic valve replacement is an important measure of quality of life; however, data remain scarce. Thus, we aimed to investigate frailty and its relation ... ...

    Abstract Background For frail patients with limited life expectancy, time in hospital following transcatheter aortic valve replacement is an important measure of quality of life; however, data remain scarce. Thus, we aimed to investigate frailty and its relation to time in hospital during the first year after transcatheter aortic valve replacement. Methods and Results From 2008 to 2020, all Danish patients who underwent transcatheter aortic valve replacement and were alive at discharge were included. Using the validated Hospital Frailty Risk Score, patients were categorized in the low, intermediate, and high frailty groups. Time in hospital and mortality up to 1 year are reported according to frailty groups. In total, 3437 (57.6%), 2277 (38.1%), and 257 (4.3%) were categorized in the low, intermediate, and high frailty groups, respectively. Median age was ≈81 years. Female sex and comorbidity burden were incrementally higher across frailty groups (low frailty: heart failure, 24.1%; stroke, 7.2%; and chronic kidney disease, 4.5%; versus high frailty: heart failure, 42.8%; stroke, 34.2%; and chronic kidney disease, 29.2%). In the low frailty group, 50.5% survived 1 year without a hospital admission, 10.8% were hospitalized >15 days, and 5.8% of patients died. By contrast, 26.1% of patients in the high frailty group survived 1 year without a hospital admission, 26.4% were hospitalized >15 days, and 15.6% died within 1 year. Differences persisted in models adjusted for sex, age, frailty, and comorbidity burden (excluding overlapping comorbidities). Conclusions Among patients undergoing transcatheter aortic valve replacement, frailty is strongly associated with time in hospital and mortality. Prevention strategies for frail patients to reduce hospitalization burden could be beneficial.
    MeSH term(s) Humans ; Female ; Aged, 80 and over ; Transcatheter Aortic Valve Replacement/adverse effects ; Frailty/diagnosis ; Frailty/epidemiology ; Frailty/complications ; Aortic Valve Stenosis ; Quality of Life ; Treatment Outcome ; Risk Factors ; Hospitalization ; Stroke/etiology ; Heart Failure/etiology ; Aortic Valve/surgery
    Language English
    Publishing date 2023-04-12
    Publishing country England
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 2653953-6
    ISSN 2047-9980 ; 2047-9980
    ISSN (online) 2047-9980
    ISSN 2047-9980
    DOI 10.1161/JAHA.122.029264
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  8. Article ; Online: High risk of rehospitalization within one year following a pulmonary embolism-Insights from the Danish nationwide registries from 2000-2020.

    Sindet-Pedersen, Caroline / El-Chouli, Mohamad / Nourhavesh, Nina / Lamberts, Morten / Christensen, Daniel Mølager / Kümler, Thomas / Lock, Morten / Grove, Erik Lerkevang / Holt, Anders / Schou, Morten / Gislason, Gunnar / Butt, Jawad Haider / Strange, Jarl Emanuel

    European heart journal. Quality of care & clinical outcomes

    2023  

    Abstract: Aim: To identify the absolute risk, causes and factors associated with rehospitalization within 1 year of discharge with a pulmonary embolism (PE).: Methods and results: Using the Danish nationwide registries, all patients admitted with a first-time ... ...

    Abstract Aim: To identify the absolute risk, causes and factors associated with rehospitalization within 1 year of discharge with a pulmonary embolism (PE).
    Methods and results: Using the Danish nationwide registries, all patients admitted with a first-time PE between 2000 and 2020 and discharged alive were included. Subsequent hospitalizations were categorized and crude cumulative incidences, were used to estimate the absolute risk (AR) of any rehospitalization and specific causes of rehospitalizations. Risk factors for rehospitalization were investigated using cause specific Cox regression models.A total of 55 201 patients were identified. The median age of the study population was 70 years (inter quartile range: 59;79), and the most prevalent comorbidities were cancer (29.3%) and ischemic heart disease (12.7%). The 1-year AR of any rehospitalization after discharge with a PE was 48.6% (95% confidence interval (CI); 48.2%-48.8%). The most common cause for being rehospitalized was due to respiratory disease (1-year AR: 9.5% (95% CI: 9.3%-9.8%)), followed by cardiovascular disease (1-year AR: 6.3% (95% CI: 5.9%-6.5%)), cancer (1-year AR: 6.0% (95% CI: 5.8%-6.4%)), venous thromboembolism (1-year AR: 5.2% (95% CI: 5.0%-5.2%)), and symptom diagnoses (1-year AR: 5.2% (95%CI: 5.0%-5.4%)). Factors that were associated with an increased risk of rehospitalization were cancer, liver disease, chronic obstructive pulmonary disease, chronic kidney disease, and immobilization.
    Conclusion: Patients with PE have a high risk of rehospitalization, with almost half of patients being rehospitalized within 1 year. Identification of high-risk patients may help target interventions aiming at reducing the risk of rehospitalization.
    Language English
    Publishing date 2023-08-04
    Publishing country England
    Document type Journal Article
    ZDB-ID 2823451-0
    ISSN 2058-1742 ; 2058-5225
    ISSN (online) 2058-1742
    ISSN 2058-5225
    DOI 10.1093/ehjqcco/qcad046
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  9. Article ; Online: Seasonal influenza vaccine uptake among patients with cardiovascular disease in Denmark, 2017-2019.

    Christensen, Daniel Mølager / Jørgensen, Sidsel Marie Bernt / El-Chouli, Mohamad / Phelps, Matthew / Schjerning, Anne-Marie / Sehested, Thomas S G / Gerds, Thomas / Sindet-Pedersen, Caroline / Biering-Sørensen, Tor / Torp-Pedersen, Christian / Schou, Morten / Gislason, Gunnar

    European heart journal. Quality of care & clinical outcomes

    2023  Volume 9, Issue 5, Page(s) 474–481

    Abstract: Background: Influenza vaccination protects against morbidity and mortality in patients with cardiovascular disease (CVD). We aimed to describe influenza vaccine uptake in patients with CVD in a universal-access healthcare system.: Methods: Using ... ...

    Abstract Background: Influenza vaccination protects against morbidity and mortality in patients with cardiovascular disease (CVD). We aimed to describe influenza vaccine uptake in patients with CVD in a universal-access healthcare system.
    Methods: Using nationwide Danish registries, we included all patients with prevalent CVD, defined as heart failure (HF), atrial fibrillation (AF), ischemic heart disease (IHD), or stroke during three consecutive influenza seasons (October-December 2017-2019). The outcome was relative frequency of influenza vaccination across strata of patient characteristics.
    Results: There was an average of 397 346 patients with CVD yearly during 2017-2019. Vaccine uptake was 45.6% for the whole population and ranged from 55.0% in AF to 61.8% in HF among patients aged ≥65 years. Among patients aged <65 years, uptake was 32.6% in HF, 19.0% in AF, 21.1% in IHD, and 18.3% in stroke. There was a lower uptake with decreasing age: 21.6% in HF, 5.5% in AF, 7.4% in IHD, and 6.3% in stroke among males aged <45 years, as opposed to 25.5% in HF, 11.5% in AF, 13.8% in IHD, and 12.1% in stroke for males aged 45-54 years. In the further stratified analyses, uptake ranged from a low of 2.5% for males <45 years with AF who were not vaccinated the previous season to a high of 87.0% for females ≥75 years with IHD who were vaccinated the previous season.
    Conclusion: Seasonal influenza vaccine uptake is suboptimal among patients with CVD, even in a universal-access healthcare system with free-of-charge vaccinations. Vaccine uptake was particularly low among young patients.
    MeSH term(s) Male ; Female ; Humans ; Young Adult ; Adult ; Influenza Vaccines ; Influenza, Human/epidemiology ; Influenza, Human/prevention & control ; Seasons ; Cardiovascular Diseases/epidemiology ; Cardiovascular Diseases/prevention & control ; Heart Failure/epidemiology ; Stroke/epidemiology ; Atrial Fibrillation ; Myocardial Ischemia ; Denmark/epidemiology
    Chemical Substances Influenza Vaccines
    Language English
    Publishing date 2023-08-09
    Publishing country England
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 2823451-0
    ISSN 2058-1742 ; 2058-5225
    ISSN (online) 2058-1742
    ISSN 2058-5225
    DOI 10.1093/ehjqcco/qcac049
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  10. Article ; Online: Outcomes of out-of-hospital cardiac arrest in adult congenital heart disease: a Danish nationwide study.

    Barcella, Carlo Alberto / Christensen, Daniel Mølager / Idorn, Lars / Mudalige, Nishan / Malmborg, Morten / Folke, Frederik / Torp-Pedersen, Christian / Gislason, Gunnar / El-Chouli, Mohamad

    European heart journal

    2023  Volume 44, Issue 34, Page(s) 3264–3274

    Abstract: Aims: The risk, characteristics, and outcome of out-of-hospital cardiac arrest (OHCA) in patients with congenital heart disease (CHD) remain scarcely investigated.: Methods and results: An epidemiological registry-based study was conducted. Using ... ...

    Abstract Aims: The risk, characteristics, and outcome of out-of-hospital cardiac arrest (OHCA) in patients with congenital heart disease (CHD) remain scarcely investigated.
    Methods and results: An epidemiological registry-based study was conducted. Using time-dependent Cox regression models fitted with a nested case-control design, hazard ratios (HRs) with 95% confidence intervals of OHCA of presumed cardiac cause (2001-19) associated with simple, moderate, and severe CHD were calculated. Moreover, using multiple logistic regression, we investigated the association between pre-hospital OHCA characteristics and 30-day survival and compared 30-day survival in OHCA patients with and without CHD. Overall, 43 967 cases (105 with simple, 144 with moderate, and 53 with severe CHD) and 219 772 controls (median age 72 years, 68.2% male) were identified. Any type of CHD was found to be associated with higher rates of OHCA compared with the background population [simple CHD: HR 1.37 (1.08-1.70); moderate CHD: HR 1.64 (1.36-1.99); and severe CHD: HR 4.36 (3.01-6.30)]. Pre-hospital cardiopulmonary resuscitation and defibrillation were both associated with improved 30-day survival in patients with CHD, regardless of CHD severity. Among patients with OHCA, simple, moderate, and severe CHD had a similar likelihood of 30-day survival compared with no CHD [odds ratio 0.95 (0.53-1.69), 0.70 (0.43-1.14), and 0.68 (0.33-1.57), respectively].
    Conclusion: A higher risk of OHCA was found throughout the spectrum of CHD. Patients with and without CHD showed the same 30-day survival, which relies on the pre-hospital chain of survival, namely cardiopulmonary resuscitation and defibrillation.
    MeSH term(s) Humans ; Male ; Adult ; Aged ; Female ; Out-of-Hospital Cardiac Arrest/epidemiology ; Out-of-Hospital Cardiac Arrest/etiology ; Out-of-Hospital Cardiac Arrest/therapy ; Heart Defects, Congenital/complications ; Heart Defects, Congenital/epidemiology ; Cardiopulmonary Resuscitation/methods ; Registries ; Denmark/epidemiology ; Emergency Medical Services
    Language English
    Publishing date 2023-07-04
    Publishing country England
    Document type Journal Article
    ZDB-ID 603098-1
    ISSN 1522-9645 ; 0195-668X
    ISSN (online) 1522-9645
    ISSN 0195-668X
    DOI 10.1093/eurheartj/ehad358
    Database MEDical Literature Analysis and Retrieval System OnLINE

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