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C. Christiansen · SciRah

Researcher profile · Semantic Scholar

C. Christiansen

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C. Christiansen — researcher profile on SciRah

h-index: 50
Works: 239
Citations: 6,941

Most-cited papers

Post-acute effects of SARS-CoV-2 infection in individuals not requiring hospital admission: a Danish population-based cohort study
L. Lund, J. Hallas, Henrik Nielsen, A. Koch +5 more
2021Lancet. Infectious Diseases (Print)203 citations Open access
Semantic Scholar
University of Southern Denmark Characteristics and predictors of hospitalization and death in the first 11 122 cases with a positive RT-PCR test for SARS-CoV-2 in Denmark a nationwide cohort
Mette Reilev, K. Kristensen, A. Pottegård, L. Lund +14 more
2020170 citations
Semantic Scholar
Effect of Intravenous or Intraosseous Calcium vs Saline on Return of Spontaneous Circulation in Adults With Out-of-Hospital Cardiac Arrest: A Randomized Clinical Trial.
M. F. Vallentin, A. Granfeldt, Carsten Meilandt, A. Povlsen +15 more
2021Journal of the American Medical Association (JAMA)89 citations Open access
Semantic Scholar
Acute kidney injury promotes development of papillary renal cell adenoma and carcinoma from renal progenitor cells
A. Peired, Giulia Antonelli, M. Angelotti, M. Allinovi +33 more
2020Science Translational Medicine72 citations Open access
Semantic Scholar
Anemia and clinical outcomes in patients with non-dialysis dependent or dialysis dependent severe chronic kidney disease: a Danish population-based study
G. Toft, U. Heide-Jørgensen, H. van Haalen, G. James +4 more
2019JN. Journal of Nephrology (Milano. 1992)72 citations Open access
Semantic Scholar
Adverse Outcomes and Mortality in Users of Non-Steroidal Anti-Inflammatory Drugs tested positive for SARS-CoV-2: A Danish Nationwide Cohort Study
L. Lund, K. Kristensen, Mette Reilev, S. Christensen +7 more
2020medRxiv65 citations Open access
Semantic Scholar
Defining measures of kidney function in observational studies using routine healthcare data: methodological and reporting considerations.
J. Carrero, Edouard L. Fu, S. Vestergaard, S. D. Jensen +19 more
2022Kidney International61 citations Open access
Semantic Scholar
Mortality prediction models in the adult critically ill: A scoping review
B. Keuning, T. Kaufmann, R. Wiersema, A. Granholm +8 more
2019Acta Anaesthesiologica Scandinavica52 citations Open access
Semantic Scholar
Acute kidney injury and 1-year mortality after colorectal cancer surgery: a population-based cohort study
Charlotte Slagelse, Henrik Gammelager, L. Iversen, H. Sørensen +1 more
2019BMJ Open51 citations Open access
Semantic Scholar
Identification of Patients with CKD in Medical Databases: A Comparison of Different Algorithms.
S. Vestergaard, C. Christiansen, R. Thomsen, H. Birn +1 more
2021American Society of Nephrology. Clinical Journal50 citations Open access
Semantic Scholar
Harmonization of epidemiology of acute kidney injury and acute kidney disease produces comparable findings across four geographic populations.
S. Sawhney, S. Bell, C. Black, C. Christiansen +7 more
2022Kidney International46 citations Open access
Semantic Scholar
Considerations for pharmacoepidemiological analyses in the SARS-CoV-2 pandemic.
A. Pottegård, X. Kurz, N. Moore, C. Christiansen +1 more
2020Pharmacoepidemiology and Drug Safety42 citations Open access
Semantic Scholar
Vascular Diseases In Patients With Chronic Myeloproliferative Neoplasms – Impact Of Comorbidity
H. Frederiksen, S. Szépligeti, Marie Bak, W. Ghanima +2 more
2019Clinical Epidemiology41 citations Open access
Semantic Scholar
Occurrence, mortality and cost of brain disorders in Denmark: a population-based cohort study
S. Vestergaard, T. B. Rasmussen, S. Stallknecht, J. Olsen +3 more
2020BMJ Open36 citations Open access
Semantic Scholar
Klinefelter syndrome and testosterone treatment: a national cohort study on thrombosis risk
Simon Chang, C. Christiansen, A. Bojesen, S. Juul +2 more
2019Endocrine Connections36 citations Open access
Semantic Scholar
The Association Between Rhabdomyolysis, Acute Kidney Injury, Renal Replacement Therapy, and Mortality
F. Nielsen, J. Cordtz, T. B. Rasmussen, C. Christiansen
2020Clinical Epidemiology33 citations Open access
Semantic Scholar
Readmission of older acutely admitted medical patients after short-term admissions in Denmark: a nationwide cohort study
M. Klinge, M. Aasbrenn, B. Öztürk, C. Christiansen +3 more
2020BMC Geriatrics32 citations Open access
Semantic Scholar
Evaluation of Neurologic and Psychiatric Outcomes After Hospital Discharge Among Adult Survivors of Cardiac Arrest
N. Secher, K. Adelborg, Péter Szentkúti, C. Christiansen +3 more
2022JAMA Network Open30 citations Open access
Semantic Scholar
Influenza vaccination and 1-year risk of myocardial infarction, stroke, heart failure, pneumonia, and mortality among intensive care unit survivors aged 65 years or older: a nationwide population-based cohort study
C. Christiansen, R. Thomsen, M. Schmidt, L. Pedersen +1 more
2019Intensive Care Medicine29 citations
Semantic Scholar
Chronic immune thrombocytopenia in Denmark, Sweden and Norway: The Nordic Country Patient Registry for Romiplostim
C. Christiansen, S. Bahmanyar, W. Ghanima, N. Risbo +7 more
2019EClinicalMedicine29 citations Open access
Semantic Scholar
Non‐obstetric abdominal surgery during pregnancy and birth outcomes: A Danish registry‐based cohort study
A. S. Rasmussen, C. Christiansen, S. P. Ulrichsen, N. Uldbjerg +1 more
2019Acta Obstetricia et Gynecologica Scandinavica28 citations
Semantic Scholar
Defining Baseline Creatinine for Identification of AKI in Population-Based Laboratory Databases: A Danish Nationwide Cohort Study
H. Graversen, S. D. Jensen, S. Vestergaard, U. Heide-Jørgensen +1 more
2021Kidney36027 citations Open access
Semantic Scholar
Risk factors for new chronic opioid use after hip fracture surgery: a Danish nationwide cohort study from 2005 to 2016 using the Danish multidisciplinary hip fracture registry
Nina M Edwards, C. Varnum, S. Overgaard, L. Nikolajsen +2 more
2021BMJ Open26 citations Open access
Semantic Scholar
Association of Nonsteroidal Anti-inflammatory Drug Use and Adverse Outcomes Among Patients Hospitalized With Influenza
L. Lund, Mette Reilev, J. Hallas, K. Kristensen +10 more
2020JAMA Network Open26 citations Open access
Semantic Scholar
Non-COVID-19 intensive care admissions during the pandemic: a multinational registry-based study
J. McLarty, E. Litton, A. Beane, D. Aryal +23 more
2023Thorax25 citations Open access
Semantic Scholar
Routine Clinical Care Creatinine Data in Denmark – An Epidemiological Resource for Nationwide Population-Based Studies of Kidney Disease
S. D. Jensen, U. Heide-Jørgensen, S. Vestergaard, H. Sørensen +1 more
2022Clinical Epidemiology25 citations Open access
Semantic Scholar
Effect of the Refitted Race-Free eGFR Formula on the CKD Prevalence and Mortality in the Danish Population.
S. Vestergaard, U. Heide-Jørgensen, H. Birn, C. Christiansen
2022American Society of Nephrology. Clinical Journal24 citations Open access
Semantic Scholar
Risk factors of hospitalisation for thrombosis in adults with primary immune thrombocytopenia, including disease‐specific treatments: a French nationwide cohort study
M. Lafaurie, J. Maquet, B. Baricault, C. Ekstrand +8 more
2021British Journal of Haematology23 citations
Semantic Scholar
One-year mortality among non-surgical patients with hematological malignancies admitted to the intensive care unit: a Danish nationwide population-based cohort study
P. Asdahl, S. Christensen, A. Kjærsgaard, C. Christiansen +1 more
2020Intensive Care Medicine22 citations
Semantic Scholar
The association between initial opioid type and long-term opioid use after hip fracture surgery in elderly opioid-naïve patients
A. Simoni, L. Nikolajsen, A. Olesen, C. Christiansen +2 more
2020Scandinavian Journal of Pain22 citations Open access
Semantic Scholar
Recovery of kidney function after acute kidney disease—a multi-cohort analysis
S. Sawhney, W. Ball, S. Bell, C. Black +8 more
2023Nephrology, Dialysis and Transplantation21 citations Open access
Semantic Scholar
Kidney disease and risk of dementia: a Danish nationwide cohort study
A. D. Kjaergaard, B. R. Johannesen, H. Sørensen, V. Henderson +1 more
2021BMJ Open21 citations Open access
Semantic Scholar
Risk of arterial thromboembolism, venous thromboembolism, and bleeding in patients with nephrotic syndrome: A population-based cohort study.
S. Vestergaard, H. Birn, B. Darvalics, D. Nitsch +2 more
2021American Journal of Medicine20 citations Open access
Semantic Scholar
Is the risk of cardiovascular disease increased in living kidney donors? A Danish population‐based cohort study
P. Munch, C. Christiansen, H. Birn, C. Erikstrup +1 more
2020American Journal of Transplantation18 citations Open access
Semantic Scholar
Obstetric and non-obstetric surgery during pregnancy: A 20-year Danish population-based prevalence study
A. S. Rasmussen, C. Christiansen, N. Uldbjerg, M. Nørgaard
2019BMJ Open18 citations Open access
Semantic Scholar
Prognostic impact of elevated lactate levels on mortality in critically ill patients with and without preadmission metformin treatment: a Danish registry-based cohort study
R. Posma, T. Frøslev, B. Jespersen, I. V. D. van der Horst +4 more
2020Annals of Intensive Care16 citations Open access
Semantic Scholar
SARS-CoV-2 infection and adverse outcomes in users of ACE inhibitors and angiotensin-receptor blockers: a nationwide case-control and cohort analysis
C. Christiansen, A. Pottegård, U. Heide-Jørgensen, J. Bodilsen +15 more
2020Thorax16 citations Open access
Semantic Scholar
Association of α1-Blocker Receipt With 30-Day Mortality and Risk of Intensive Care Unit Admission Among Adults Hospitalized With Influenza or Pneumonia in Denmark
R. Thomsen, C. Christiansen, U. Heide-Jørgensen, J. Vogelstein +5 more
2021JAMA Network Open15 citations Open access
Semantic Scholar
Predictors for place of death among children:A systematic review and meta-analyses of recent literature
S. Wolff, C. Christiansen, M. K. Nielsen, S. P. Johnsen +2 more
2020European Journal of Pediatrics15 citations
Semantic Scholar
Mortality of older acutely admitted medical patients after early discharge from emergency departments: a nationwide cohort study
M. Aasbrenn, C. Christiansen, B. Esen, C. Suetta +1 more
2021BMC Geriatrics14 citations Open access
Semantic Scholar
Hospitalisation at the end of life among cancer and non-cancer patients in Denmark: a nationwide register-based cohort study
A. Vestergaard, M. A. Neergaard, C. Christiansen, H. Nielsen +3 more
2020BMJ Open14 citations Open access
Semantic Scholar
Twenty-four-Year Trends in Incidence and Mortality of Nephrotic Syndrome: A Population-Based Cohort Study
S. Vestergaard, H. Birn, S. D. Jensen, H. Sørensen +2 more
2022Epidemiology13 citations Open access
Semantic Scholar
Temporal trends in patient characteristics, presumed causes, and outcomes following cardiogenic shock between 2005 and 2017: a Danish registry-based cohort study.
Line Thorgaard Petersen, S. Riddersholm, D. Andersen, C. Polcwiartek +9 more
2021European heart journal. Acute cardiovascular care13 citations
Semantic Scholar
Risk of Anemia in Patients with Newly Identified Chronic Kidney Disease – A Population-Based Cohort Study
S. Vestergaard, U. Heide-Jørgensen, H. van Haalen, G. James +4 more
2020Clinical Epidemiology13 citations Open access
Semantic Scholar
Organ support therapy in the intensive care unit and return to work: a nationwide, register-based cohort study
S. Riddersholm, S. Christensen, K. Kragholm, C. Christiansen +1 more
2018Intensive Care Medicine13 citations
Semantic Scholar
Factors associated with risk and prognosis of intensive care unit admission in patients with acute leukemia: a Danish nationwide cohort study
C. Maeng, C. Christiansen, Kathleen D. Liu, Peter Kamper +3 more
2022Leukemia and Lymphoma11 citations Open access
Semantic Scholar
Organ support therapy in the intensive care unit and return to work in out-of-hospital cardiac arrest survivors-A nationwide cohort study.
S. Riddersholm, K. Kragholm, R. Mortensen, S. Hansen +5 more
2018Resuscitation11 citations Open access
Semantic Scholar
Utilisation of hospital-based specialist palliative care in patients with gynaecological cancer: Temporal trends, predictors and association with high-intensity end-of-life care.
A. Vestergaard, M. A. Neergaard, L. Fokdal, C. Christiansen +2 more
2023Gynecologic Oncology10 citations Open access
Semantic Scholar
Renin–Angiotensin System Blockers and Adverse Outcomes of Influenza and Pneumonia: A Danish Cohort Study
C. Christiansen, U. Heide-Jørgensen, T. B. Rasmussen, Jacob Bodilsen +12 more
2020Journal of the American Heart Association : Cardiovascular and Cerebrovascular Disease10 citations Open access
Semantic Scholar
Prediction of chronic postsurgical pain in adults: a protocol for multivariable prediction model development
Nicholas Papadomanolakis-Pakis, S. Haroutounian, C. Christiansen, L. Nikolajsen
2021BMJ Open9 citations Open access
Semantic Scholar

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R. Thomsen×12
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R. Thomsen — researcher profile on SciRah
H. Sørensen×12
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U. Heide-Jørgensen×12
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S. Christensen×7

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L. Lund — researcher profile on SciRah

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J. Hallas — researcher profile on SciRah

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S. D. Jensen — researcher profile on SciRah

Mette Reilev×5

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Mette Reilev — researcher profile on SciRah