Confidence Intervals and Power Calculations for Within-Person Biological Variation: Effect of Analytical Imprecision, Number of Replicates, Number of Samples, and Number of Individuals
RØRAAS, Thomas, PETERSEN, Per H, SANDBERG, Sverre
Published in Clinical chemistry (Baltimore, Md.) (01.09.2012)
Published in Clinical chemistry (Baltimore, Md.) (01.09.2012)
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Journal Article
A Bayesian Approach to Biological Variation Analysis
Røraas, Thomas, Sandberg, Sverre, Aarsand, Aasne K, Støve, Bård
Published in Clinical chemistry (Baltimore, Md.) (01.08.2019)
Published in Clinical chemistry (Baltimore, Md.) (01.08.2019)
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Journal Article
The Biological Variation Data Critical Appraisal Checklist: A Standard for Evaluating Studies on Biological Variation
Aarsand, Aasne K, Røraas, Thomas, Fernandez-Calle, Pilar, Ricos, Carmen, Díaz-Garzón, Jorge, Jonker, Niels, Perich, Carmen, González-Lao, Elisabet, Carobene, Anna, Minchinela, Joana, Coşkun, Abdurrahman, Simón, Margarita, Álvarez, Virtudes, Bartlett, William A, Fernández-Fernández, Pilar, Boned, Beatriz, Braga, Federica, Corte, Zoraida, Aslan, Berna, Sandberg, Sverre
Published in Clinical chemistry (Baltimore, Md.) (01.03.2018)
Published in Clinical chemistry (Baltimore, Md.) (01.03.2018)
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Journal Article
Harmonization initiatives in the generation, reporting and application of biological variation data
Aarsand, Aasne K., Røraas, Thomas, Bartlett, William A., Coşkun, Abdurrahman, Carobene, Anna, Fernandez-Calle, Pilar, Jonker, Niels, Díaz-Garzón, Jorge, Braga, Federica, Sandberg, Sverre
Published in Clinical chemistry and laboratory medicine (25.09.2018)
Published in Clinical chemistry and laboratory medicine (25.09.2018)
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Journal Article
Sample collections from healthy volunteers for biological variation estimates’ update: a new project undertaken by the Working Group on Biological Variation established by the European Federation of Clinical Chemistry and Laboratory Medicine
Carobene, Anna, Strollo, Marta, Jonker, Niels, Barla, Gerhard, Bartlett, William A., Sandberg, Sverre, Sylte, Marit Sverresdotter, Røraas, Thomas, Sølvik, Una Ørvim, Fernandez-Calle, Pilar, Díaz-Garzón, Jorge, Tosato, Francesca, Plebani, Mario, Coşkun, Abdurrahman, Serteser, Mustafa, Unsal, Ibrahim, Ceriotti, Ferruccio, on behalf of the Biological Variation Working Group, European Federation of Clinical Chemistry and Laboratory Medicine
Published in Clinical chemistry and laboratory medicine (01.10.2016)
Published in Clinical chemistry and laboratory medicine (01.10.2016)
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Journal Article
The EuBIVAS: Within- and Between-Subject Biological Variation Data for Electrolytes, Lipids, Urea, Uric Acid, Total Protein, Total Bilirubin, Direct Bilirubin, and Glucose
Aarsand, Aasne K, Díaz-Garzón, Jorge, Fernandez-Calle, Pilar, Guerra, Elena, Locatelli, Massimo, Bartlett, William A, Sandberg, Sverre, Røraas, Thomas, Ceriotti, Ferruccio, Sølvik, Una Ørvim, Sverresdotter Sylte, Marit, Coşkun, Abdurrahman, Serteser, Mustafa, Unsal, Ibrahim, Tosato, Francesca, Plebani, Mario, Jonker, Niels, Barla, Gerhard, Carobene, Anna
Published in Clinical chemistry (Baltimore, Md.) (01.09.2018)
Published in Clinical chemistry (Baltimore, Md.) (01.09.2018)
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Journal Article
Weekly and 90-minute biological variations in cardiac troponin T and cardiac troponin I in hemodialysis patients and healthy controls
Aakre, Kristin M, Røraas, Thomas, Petersen, Per Hyltoft, Svarstad, Einar, Sellevoll, Hilde, Skadberg, Øyvind, Sæle, Kristin, Sandberg, Sverre
Published in Clinical chemistry (Baltimore, Md.) (01.06.2014)
Published in Clinical chemistry (Baltimore, Md.) (01.06.2014)
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Journal Article
The European Biological Variation Study (EuBIVAS): Biological Variation Data for Coagulation Markers Estimated by a Bayesian Model
Aarsand, Aasne K, Kristoffersen, Ann Helen, Sandberg, Sverre, Støve, Bård, Coşkun, Abdurrahman, Fernandez-Calle, Pilar, Díaz-Garzón, Jorge, Guerra, Elena, Ceriotti, Ferruccio, Jonker, Niels, Røraas, Thomas, Carobene, Anna
Published in Clinical chemistry (Baltimore, Md.) (01.09.2021)
Published in Clinical chemistry (Baltimore, Md.) (01.09.2021)
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Journal Article
The EuBIVAS Project: Within- and Between-Subject Biological Variation Data for Serum Creatinine Using Enzymatic and Alkaline Picrate Methods and Implications for Monitoring
Carobene, Anna, Marino, Irene, Coşkun, Abdurrahman, Serteser, Mustafa, Unsal, Ibrahim, Guerra, Elena, Bartlett, William A, Sandberg, Sverre, Aarsand, Aasne Karine, Sylte, Marit Sverresdotter, Røraas, Thomas, Sølvik, Una Ørvim, Fernandez-Calle, Pilar, Díaz-Garzón, Jorge, Tosato, Francesca, Plebani, Mario, Jonker, Niels, Barla, Gerhard, Ceriotti, Ferruccio
Published in Clinical chemistry (Baltimore, Md.) (01.09.2017)
Published in Clinical chemistry (Baltimore, Md.) (01.09.2017)
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Journal Article
Biological variation estimates for prostate specific antigen from the European Biological Variation Study; consequences for diagnosis and monitoring of prostate cancer
Carobene, Anna, Guerra, Elena, Locatelli, Massimo, Cucchiara, Vito, Briganti, Alberto, Aarsand, Aasne K., Coşkun, Abdurrahman, Díaz-Garzón, Jorge, Fernandez-Calle, Pilar, Røraas, Thomas, Sandberg, Sverre, Jonker, Niels, Ceriotti, Ferruccio
Published in Clinica chimica acta (01.11.2018)
Published in Clinica chimica acta (01.11.2018)
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Journal Article
Within-subject biological variation of activated partial thromboplastin time, prothrombin time, fibrinogen, factor VIII and von Willebrand factor in pregnant women
Kristoffersen, Ann Helen, Petersen, Per Hyltoft, Bjørge, Line, Røraas, Thomas, Sandberg, Sverre
Published in Clinical chemistry and laboratory medicine (26.07.2018)
Published in Clinical chemistry and laboratory medicine (26.07.2018)
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Journal Article
Estimates of Within-Subject Biological Variation of Protein C, Antithrombin, Protein S Free, Protein S Activity, and Activated Protein C Resistance in Pregnant Women
Kristoffersen, Ann H, Petersen, Per H, Røraas, Thomas, Sandberg, Sverre
Published in Clinical chemistry (Baltimore, Md.) (01.04.2017)
Published in Clinical chemistry (Baltimore, Md.) (01.04.2017)
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Journal Article
Biological Variation Estimates Obtained from 91 Healthy Study Participants for 9 Enzymes in Serum
Carobene, Anna, Røraas, Thomas, Sølvik, Una Ørvim, Sylte, Marit Sverresdotter, Sandberg, Sverre, Guerra, Elena, Marino, Irene, Jonker, Niels, Barla, Gerhard, Bartlett, William A, Fernandez-Calle, Pilar, Díaz-Garzón, Jorge, Tosato, Francesca, Plebani, Mario, Coşkun, Abdurrahman, Serteser, Mustafa, Unsal, Ibrahim, Ceriotti, Ferruccio
Published in Clinical chemistry (Baltimore, Md.) (01.06.2017)
Published in Clinical chemistry (Baltimore, Md.) (01.06.2017)
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Journal Article
Biological variation – reliable data is essential
Aarsand, Aasne K., Røraas, Thomas, Sandberg, Sverre
Published in Clinical chemistry and laboratory medicine (01.02.2015)
Published in Clinical chemistry and laboratory medicine (01.02.2015)
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Journal Article
Biological variation: Evaluation of methods for constructing confidence intervals for estimates of within-person biological variation for different distributions of the within-person effect
Røraas, Thomas, Støve, Bård, Petersen, Per Hyltoft, Sandberg, Sverre
Published in Clinica chimica acta (01.05.2017)
Published in Clinica chimica acta (01.05.2017)
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Journal Article
Point-of-care urine albumin in general practice offices: effect of participation in an external quality assurance scheme
Bukve, Tone, Røraas, Thomas, Riksheim, Berit Oddny, Christensen, Nina Gade, Sandberg, Sverre
Published in Clinical chemistry and laboratory medicine (01.01.2015)
Published in Clinical chemistry and laboratory medicine (01.01.2015)
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Journal Article
Calcium, magnesium, albumin, and total protein measurement in serum as assessed with 20 fresh-frozen single-donation sera
Van Houcke, Sofie K, Rustad, Pål, Stepman, Hedwig C M, Kristensen, Gunn B B, Stöckl, Dietmar, Røraas, Thomas H, Sandberg, Sverre, Thienpont, Linda M
Published in Clinical chemistry (Baltimore, Md.) (01.11.2012)
Published in Clinical chemistry (Baltimore, Md.) (01.11.2012)
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Journal Article
Feasibility of using self-reported patient data in a national diabetes register
Løvaas, Karianne Fjeld, Cooper, John G, Sandberg, Sverre, Røraas, Thomas, Thue, Geir
Published in BMC health services research (15.12.2015)
Published in BMC health services research (15.12.2015)
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Journal Article