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Items: 32

1.

A Bayesian Approach to Biological Variation Analysis.

Røraas T, Sandberg S, Aarsand AK, Støve B.

Clin Chem. 2019 Jul 1. pii: clinchem.2018.300145. doi: 10.1373/clinchem.2018.300145. [Epub ahead of print]

PMID:
31263036
2.

Systematic review of the biological variation data for diabetes related analytes.

González-Lao E, Corte Z, Simón M, Ricós C, Coskun A, Braga F, Aarsand AK, Carobene A, Bartlett WA, Boned B, Asland B, Díaz-Garzón J, Marqués-García F, Minchinela J, Perich C, Fernández-Calle P, Roraas T, Fernández-Fernández P, Jonker N, Sandberg S; European Federation of Clinical Chemistry and Laboratory Medicine Working Group on Biological Variation and Task Group for the Biological Variation Database.

Clin Chim Acta. 2019 Jan;488:61-67. doi: 10.1016/j.cca.2018.10.031. Epub 2018 Oct 31.

PMID:
30389455
3.

Biological variation estimates for prostate specific antigen from the European Biological Variation Study; consequences for diagnosis and monitoring of prostate cancer.

Carobene A, Guerra E, Locatelli M, Cucchiara V, Briganti A, Aarsand AK, Coşkun A, Díaz-Garzón J, Fernandez-Calle P, Røraas T, Sandberg S, Jonker N, Ceriotti F; European Federation of Clinical Chemistry; Laboratory Medicine Working Group on Biological Variation.

Clin Chim Acta. 2018 Nov;486:185-191. doi: 10.1016/j.cca.2018.07.043. Epub 2018 Jul 29.

PMID:
30063887
4.

The EuBIVAS: Within- and Between-Subject Biological Variation Data for Electrolytes, Lipids, Urea, Uric Acid, Total Protein, Total Bilirubin, Direct Bilirubin, and Glucose.

Aarsand AK, Díaz-Garzón J, Fernandez-Calle P, Guerra E, Locatelli M, Bartlett WA, Sandberg S, Røraas T, Ceriotti F, Sølvik UØ, Sverresdotter Sylte M, Coşkun A, Serteser M, Unsal I, Tosato F, Plebani M, Jonker N, Barla G, Carobene A; European Federation of Clinical Chemistry and Laboratory Medicine Working Group on Biological Variation.

Clin Chem. 2018 Sep;64(9):1380-1393. doi: 10.1373/clinchem.2018.288415. Epub 2018 Jun 25.

PMID:
29941472
5.

Within-subject biological variation of activated partial thromboplastin time, prothrombin time, fibrinogen, factor VIII and von Willebrand factor in pregnant women.

Kristoffersen AH, Petersen PH, Bjørge L, Røraas T, Sandberg S.

Clin Chem Lab Med. 2018 Jul 26;56(8):1297-1308. doi: 10.1515/cclm-2017-1220.

PMID:
29648994
6.

Harmonization initiatives in the generation, reporting and application of biological variation data.

Aarsand AK, Røraas T, Bartlett WA, Coşkun A, Carobene A, Fernandez-Calle P, Jonker N, Díaz-Garzón J, Braga F, Sandberg S; European Federation of Clinical Chemistry and Laboratory Medicine (EFLM) Working Group on Biological Variation.

Clin Chem Lab Med. 2018 Sep 25;56(10):1629-1636. doi: 10.1515/cclm-2018-0058. Review. No abstract available.

7.

The Biological Variation Data Critical Appraisal Checklist: A Standard for Evaluating Studies on Biological Variation.

Aarsand AK, Røraas T, Fernandez-Calle P, Ricos C, Díaz-Garzón J, Jonker N, Perich C, González-Lao E, Carobene A, Minchinela J, Coşkun A, Simón M, Álvarez V, Bartlett WA, Fernández-Fernández P, Boned B, Braga F, Corte Z, Aslan B, Sandberg S; European Federation of Clinical Chemistry and Laboratory Medicine Working Group on Biological Variation and Task and Finish Group for the Biological Variation Database.

Clin Chem. 2018 Mar;64(3):501-514. doi: 10.1373/clinchem.2017.281808. Epub 2017 Dec 8.

8.

The EuBIVAS Project: Within- and Between-Subject Biological Variation Data for Serum Creatinine Using Enzymatic and Alkaline Picrate Methods and Implications for Monitoring.

Carobene A, Marino I, Coşkun A, Serteser M, Unsal I, Guerra E, Bartlett WA, Sandberg S, Aarsand AK, Sylte MS, Røraas T, Sølvik UØ, Fernandez-Calle P, Díaz-Garzón J, Tosato F, Plebani M, Jonker N, Barla G, Ceriotti F; European Biological Variation Study of the EFLM Working Group on Biological Variation.

Clin Chem. 2017 Sep;63(9):1527-1536. doi: 10.1373/clinchem.2017.275115. Epub 2017 Jul 18.

9.

Biological Variation Estimates Obtained from 91 Healthy Study Participants for 9 Enzymes in Serum.

Carobene A, Røraas T, Sølvik UØ, Sylte MS, Sandberg S, Guerra E, Marino I, Jonker N, Barla G, Bartlett WA, Fernandez-Calle P, Díaz-Garzón J, Tosato F, Plebani M, Coşkun A, Serteser M, Unsal I, Ceriotti F; European Biological Variation Study of the EFLM Working Group on Biological Variation.

Clin Chem. 2017 Jun;63(6):1141-1150. doi: 10.1373/clinchem.2016.269811. Epub 2017 Apr 20.

10.

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 T, Støve B, Petersen PH, Sandberg S.

Clin Chim Acta. 2017 May;468:166-173. doi: 10.1016/j.cca.2017.02.021. Epub 2017 Feb 28.

PMID:
28257883
11.

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 AH, Petersen PH, Røraas T, Sandberg S.

Clin Chem. 2017 Apr;63(4):898-907. doi: 10.1373/clinchem.2016.265900. Epub 2017 Feb 14.

12.

The variation in high sensitive cardiac troponin concentration during haemodialysis treatment is not similar to the biological variation observed in stable end stage renal disease patients.

Skadberg Ø, Sandberg S, Røraas T, Petersen PH, Sellevoll H, Svarstad E, Sæle K, Aakre KM.

Scand J Clin Lab Invest. 2016 Dec;76(8):645-652. Epub 2016 Oct 5.

PMID:
27705007
13.

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 A, Strollo M, Jonker N, Barla G, Bartlett WA, Sandberg S, Sylte MS, Røraas T, Sølvik UØ, Fernandez-Calle P, Díaz-Garzón J, Tosato F, Plebani M, Coşkun A, Serteser M, Unsal I, Ceriotti F; Biological Variation Working Group, European Federation of Clinical Chemistry and Laboratory Medicine.

Clin Chem Lab Med. 2016 Oct 1;54(10):1599-608. doi: 10.1515/cclm-2016-0035.

14.

Biological Variation: The Effect of Different Distributions on Estimated Within-Person Variation and Reference Change Values.

Røraas T, Støve B, Petersen PH, Sandberg S.

Clin Chem. 2016 May;62(5):725-36. doi: 10.1373/clinchem.2015.252296. Epub 2016 Mar 21.

15.

Feasibility of using self-reported patient data in a national diabetes register.

Løvaas KF, Cooper JG, Sandberg S, Røraas T, Thue G.

BMC Health Serv Res. 2015 Dec 15;15:553. doi: 10.1186/s12913-015-1226-0.

16.

A checklist for critical appraisal of studies of biological variation.

Bartlett WA, Braga F, Carobene A, Coşkun A, Prusa R, Fernandez-Calle P, Røraas T, Jonker N, Sandberg S; Biological Variation Working Group, European Federation of Clinical Chemistry and Laboratory Medicine (EFLM).

Clin Chem Lab Med. 2015 May;53(6):879-85. doi: 10.1515/cclm-2014-1127.

17.

Biological variation – reliable data is essential.

Aarsand AK, Røraas T, Sandberg S.

Clin Chem Lab Med. 2015 Feb;53(2):153-4. doi: 10.1515/cclm-2014-1141. No abstract available.

18.

Benchmarking by HbA1c in a national diabetes quality register--does measurement bias matter?

Carlsen S, Thue G, Cooper JG, Røraas T, Gøransson LG, Løvaas K, Sandberg S.

Clin Chem Lab Med. 2015 Aug;53(9):1433-9. doi: 10.1515/cclm-2014-0872.

PMID:
25503669
19.

Biological variation of hemoglobin A1c: consequences for diagnosing diabetes mellitus.

Lenters-Westra E, Røraas T, Schindhelm RK, Slingerland RJ, Sandberg S.

Clin Chem. 2014 Dec;60(12):1570-2. doi: 10.1373/clinchem.2014.227983. Epub 2014 Sep 23. No abstract available.

20.

Point-of-care urine albumin in general practice offices: effect of participation in an external quality assurance scheme.

Bukve T, Røraas T, Riksheim BO, Christensen NG, Sandberg S.

Clin Chem Lab Med. 2015 Jan;53(1):45-51. doi: 10.1515/cclm-2014-0483.

PMID:
25153401
21.

The influence of coagulation factors on the in-treatment biological variation of international normalized ratio for patients on warfarin.

Sølvik UØ, Røraas T, Petersen PH, Stavelin A, Monsen G, Sandberg S.

Scand J Clin Lab Invest. 2014 Sep;74(6):470-6. doi: 10.3109/00365513.2014.902098. Epub 2014 Apr 13.

PMID:
24724577
22.

Weekly and 90-minute biological variations in cardiac troponin T and cardiac troponin I in hemodialysis patients and healthy controls.

Aakre KM, Røraas T, Petersen PH, Svarstad E, Sellevoll H, Skadberg Ø, Sæle K, Sandberg S.

Clin Chem. 2014 Jun;60(6):838-47. doi: 10.1373/clinchem.2013.216978. Epub 2014 Mar 11.

23.

A systematic review of data on biological variation for alanine aminotransferase, aspartate aminotransferase and γ-glutamyl transferase.

Carobene A, Braga F, Roraas T, Sandberg S, Bartlett WA.

Clin Chem Lab Med. 2013 Oct;51(10):1997-2007. doi: 10.1515/cclm-2013-0096. Review.

PMID:
24072574
24.

Week-to-week biological variation in the N-terminal prohormone of brain natriuretic peptide in hemodialysis patients and healthy individuals.

Aakre KM, Røraas T, Petersen PH, Svarstad E, Sæle K, Sandberg S.

Clin Chem. 2013 Dec;59(12):1813-4. doi: 10.1373/clinchem.2013.209353. Epub 2013 Sep 16. No abstract available.

25.

Diagnosing diabetes mellitus: performance of hemoglobin A1c point-of-care instruments in general practice offices.

Sølvik UØ, Røraas T, Christensen NG, Sandberg S.

Clin Chem. 2013 Dec;59(12):1790-801. doi: 10.1373/clinchem.2013.210781. Epub 2013 Aug 19.

26.

Effect of coagulation factors on discrepancies in International Normalized Ratio results between instruments.

Sølvik UØ, Røraas TH, Petersen PH, Stavelin AV, Monsen G, Sandberg S.

Clin Chem Lab Med. 2012 Mar 30;50(9):1611-20. doi: 10.1515/cclm-2011-0820.

PMID:
22962222
27.

Calcium, magnesium, albumin, and total protein measurement in serum as assessed with 20 fresh-frozen single-donation sera.

Van Houcke SK, Rustad P, Stepman HC, Kristensen GB, Stöckl D, Røraas TH, Sandberg S, Thienpont LM.

Clin Chem. 2012 Nov;58(11):1597-9. doi: 10.1373/clinchem.2012.189670. Epub 2012 Sep 5. No abstract available.

28.

Regional differences in sales of glucometer strips and antidiabetics.

Kjome RL, Røraas T, Granås AG, Sandberg S.

Tidsskr Nor Laegeforen. 2012 Jun 26;132(12-13):1453-7. doi: 10.4045/tidsskr.11.1196. English, Norwegian.

29.

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 T, Petersen PH, Sandberg S.

Clin Chem. 2012 Sep;58(9):1306-13. doi: 10.1373/clinchem.2012.187781. Epub 2012 Jul 3. Erratum in: Clin Chem. 2012 Dec;58(12):1724.

30.

Statistical power for commutability testing in the presence of random, sample-related effects by use of the EP14 protocol.

Røraas TH, Van Houcke SK, Stöckl D, Thienpont LM.

Clin Chim Acta. 2012 Oct 9;413(19-20):1710-1. doi: 10.1016/j.cca.2012.05.002. Epub 2012 May 10. No abstract available.

PMID:
22579766
31.

The prevalence of self-monitoring of blood glucose and costs of glucometer strips in a nationwide cohort.

Kjome RL, Granas AG, Nerhus K, Roraas TH, Sandberg S.

Diabetes Technol Ther. 2010 Sep;12(9):701-5. doi: 10.1089/dia.2010.0056.

PMID:
20687865
32.

Sickness absence with musculoskeletal or mental diagnoses, transition into disability pension and all-cause mortality: a 9-year prospective cohort study.

Gjesdal S, Haug K, Ringdal P, Maeland JG, Hagberg J, Røraas T, Vollset SE, Alexanderson K.

Scand J Public Health. 2009 Jun;37(4):387-94. doi: 10.1177/1403494809103994. Epub 2009 Mar 26.

PMID:
19324926

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