Peter Ridefelt

Patient medians for NT-proBNP from six Swedish counties 2011-2021

Lundgren, Morgan; Ridefelt, Peter; Svensson, Maria K.; Cars, Thomas et al.

Part of Scandinavian Journal of Clinical and Laboratory Investigation, p. 368-378, 2025

• DOI for Patient medians for NT-proBNP from six Swedish counties 2011-2021
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Identification of cystatin C as a new marker of glomerular filtration rate, and of shrunken pore syndrome - a new kidney disorder defining selective glomerular hypofiltration syndromes - calls for expansion of the international KDIGO guidelines

Åkesson, Anna; Öberg, Carl; Malmgren, Linnea; Nilsson, Christopher et al.

Part of Scandinavian Journal of Clinical and Laboratory Investigation, p. 409-419, 2025

• DOI for Identification of cystatin C as a new marker of glomerular filtration rate, and of shrunken pore syndrome - a new kidney disorder defining selective glomerular hypofiltration syndromes - calls for expansion of the international KDIGO guidelines
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Inter-laboratory variation for urine albumin among laboratories in a Swedish external quality assessment scheme 2005–2023

Lundgren, Morgan; Ridefelt, Peter; Kristoffersson, Carolina; Samuelsson, Ingegerd et al.

Part of Clinical Biochemistry, 2024

• DOI for Inter-laboratory variation for urine albumin among laboratories in a Swedish external quality assessment scheme 2005–2023
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Pediatric reference intervals for serum folate and cobalamin based on a European population without exposure to folic acid fortification

Ridefelt, Peter; Saldeen, Johan; Vogel, Mandy; Ceglarek, Uta et al.

Part of Scandinavian Journal of Clinical and Laboratory Investigation, p. 104-108, 2024

• DOI for Pediatric reference intervals for serum folate and cobalamin based on a European population without exposure to folic acid fortification
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Interlaboratory variation for NT-proBNP among Swedish laboratories in an external quality program 2011-2021

Lundgren, Morgan; Ridefelt, Peter; Karlsson, Mathias; Norling, Anna et al.

Part of Clinical Chemistry and Laboratory Medicine, p. 1643-1651, 2023

• DOI for Interlaboratory variation for NT-proBNP among Swedish laboratories in an external quality program 2011-2021
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Patient medians for NT-proBNP from six Swedish counties 2011-2021

Lundgren, Morgan; Ridefelt, Peter; Svensson, Maria K.; Cars, Thomas et al.

Part of Scandinavian Journal of Clinical and Laboratory Investigation, p. 368-378, 2025

• DOI for Patient medians for NT-proBNP from six Swedish counties 2011-2021
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Inter-laboratory variation for urine albumin among laboratories in a Swedish external quality assessment scheme 2005–2023

Lundgren, Morgan; Ridefelt, Peter; Kristoffersson, Carolina; Samuelsson, Ingegerd et al.

Part of Clinical Biochemistry, 2024

• DOI for Inter-laboratory variation for urine albumin among laboratories in a Swedish external quality assessment scheme 2005–2023
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Pediatric reference intervals for serum folate and cobalamin based on a European population without exposure to folic acid fortification

Ridefelt, Peter; Saldeen, Johan; Vogel, Mandy; Ceglarek, Uta et al.

Part of Scandinavian Journal of Clinical and Laboratory Investigation, p. 104-108, 2024

• DOI for Pediatric reference intervals for serum folate and cobalamin based on a European population without exposure to folic acid fortification
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Interlaboratory variation for NT-proBNP among Swedish laboratories in an external quality program 2011-2021

Lundgren, Morgan; Ridefelt, Peter; Karlsson, Mathias; Norling, Anna et al.

Part of Clinical Chemistry and Laboratory Medicine, p. 1643-1651, 2023

• DOI for Interlaboratory variation for NT-proBNP among Swedish laboratories in an external quality program 2011-2021
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The complexity of kidney disease and diagnosing it - Cystatin C, selective glomerular hypofiltration syndromes and proteome regulation.

Malmgren, Linnea; Öberg, Carl; den Bakker, Emil; Leion, Felicia et al.

Part of Journal of Internal Medicine, p. 293-308, 2023

• DOI for The complexity of kidney disease and diagnosing it - Cystatin C, selective glomerular hypofiltration syndromes and proteome regulation.
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Association of Test Results for 33 Frequently Used Laboratory Tests with Body Mass Index (BMI)

Helmersson-Karlqvist, Johanna; Lind, Lars; Ridefelt, Peter; Ärnlöv, Johan et al.

Part of CLINICAL AND EXPERIMENTAL INVESTIGATIONS, p. 2-4, 2020

• DOI for Association of Test Results for 33 Frequently Used Laboratory Tests with Body Mass Index (BMI)

Vitamin D status in children and adults in Sweden: dietary intake and 25-hydroxyvitamin D concentrations in children aged 10-12 years and adults aged 18-80 years

Nälsén, Cecilia; Becker, Wulf; Pearson, Monika; Ridefelt, Peter et al.

Part of Journal of Nutritional Science, 2020

• DOI for Vitamin D status in children and adults in Sweden: dietary intake and 25-hydroxyvitamin D concentrations in children aged 10-12 years and adults aged 18-80 years
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Hemolysis interference in 10 coagulation assays on an instrument with viscosity-based, chromogenic, and turbidimetric clot detection

Hedeland, Ylva; Gustafsson, Christina M; Touza, Zinah; Ridefelt, Peter

Part of International Journal of Laboratory Hematology, p. 341-349, 2020

• DOI for Hemolysis interference in 10 coagulation assays on an instrument with viscosity-based, chromogenic, and turbidimetric clot detection
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Age- and sex-specific reference values for non-HDL cholesterol and remnant cholesterol derived from the Nordic Reference Interval Project (NORIP)

Ridefelt, Peter; Hagström, Emil; Svensson, Maria K.; Åkerfeldt, Torbjörn et al.

Part of Scandinavian Journal of Clinical and Laboratory Investigation, p. 39-42, 2019

• DOI for Age- and sex-specific reference values for non-HDL cholesterol and remnant cholesterol derived from the Nordic Reference Interval Project (NORIP)
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Lower creatinine concentration values and lower inter-laboratory variation among Swedish hospital laboratories in 2014 compared to 1996: results from the Equalis external quality assessment program

Helmersson, Johanna; Ridefelt, Peter; Boija, Elisabet Eriksson; Nordin, Gunnar

Part of Clinical Chemistry and Laboratory Medicine, p. 838-844, 2019

• DOI for Lower creatinine concentration values and lower inter-laboratory variation among Swedish hospital laboratories in 2014 compared to 1996: results from the Equalis external quality assessment program

Digoxin and Mortality in Patients With Atrial Fibrillation

Lopes, Renato D.; Rordorf, Roberto; De Ferrari, Gaetano M.; Leonardi, Sergio et al.

Part of Journal of the American College of Cardiology, p. 1063-1074, 2018

• DOI for Digoxin and Mortality in Patients With Atrial Fibrillation

Pediatric reference intervals for general clinical chemistry components: merging of studies from Denmark and Sweden

Ridefelt, Peter; Hilsted, Linda; Juul, Anders; Hellberg, Dan et al.

Part of Scandinavian Journal of Clinical and Laboratory Investigation, p. 365-372, 2018

• DOI for Pediatric reference intervals for general clinical chemistry components: merging of studies from Denmark and Sweden
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Dietary intake and biomarker status of folate in Swedish adults

Öhrvik, Veronica; Warensjö, Eva; Nälsén, Cecilia; Becker, Wulf et al.

Part of European Journal of Nutrition, p. 451-462, 2018

• DOI for Dietary intake and biomarker status of folate in Swedish adults
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Pediatric reference intervals for liver markers derived from healthy community-based subjects will improve diagnostic interpretation in children and adolescents

Larsson, Anders; Ridefelt, Peter

Part of Journal of Laboratory and Precision Medicine, p. 2, 2018

• DOI for Pediatric reference intervals for liver markers derived from healthy community-based subjects will improve diagnostic interpretation in children and adolescents

Perfluoroalkyl acid levels in first-time mothers in relation to offspring weight gain and growth

Gyllenhammar, Irina; Diderholm, Barbro; Gustafsson, Jan; Berger, Urs et al.

Part of Environment International, p. 191-199, 2018

• DOI for Perfluoroalkyl acid levels in first-time mothers in relation to offspring weight gain and growth
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Serum levels of brominated flame retardants (BFRs: PBDE, HBCD) and influence of dietary factors in a population-based study on Swedish adults

Bjermo, Helena; Aune, Marie; Cantillana, Tatiana; Glynn, Anders et al.

Part of Chemosphere, p. 485-491, 2017

• DOI for Serum levels of brominated flame retardants (BFRs: PBDE, HBCD) and influence of dietary factors in a population-based study on Swedish adults
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Albumin adjustment of total calcium does not improve the estimation of calcium status

Ridefelt, Peter; Helmersson-Karlqvist, Johanna

Part of Scandinavian Journal of Clinical and Laboratory Investigation, p. 442-447, 2017

• DOI for Albumin adjustment of total calcium does not improve the estimation of calcium status

Cystatin C Predicts Incident Cardiovascular Disease in Twins

Arpegard, Johannes; Magnusson, Patrik K. E.; Chen, Xu; Ridefelt, Peter et al.

Part of Journal of the American Heart Association, 2016

• DOI for Cystatin C Predicts Incident Cardiovascular Disease in Twins

Reference values for 34 frequently used laboratory tests in 80-year-old men and women

Helmersson, Johanna; Ridefelt, Peter; Lind, Lars; Larsson, Anders

Part of Maturitas, p. 97-101, 2016

• DOI for Reference values for 34 frequently used laboratory tests in 80-year-old men and women

Population-Based Pediatric Reference Intervals in General Clinical Chemistry: A Swedish Survey

Ridefelt, Peter

Part of Journal of Medical Biochemistry, p. 64-65, 2015

• DOI for Population-Based Pediatric Reference Intervals in General Clinical Chemistry: A Swedish Survey

Relative validation of the dietary intake of fatty acids among adults in the Swedish National Dietary Survey using plasma phospholipid fatty acid composition.

Warensjö Lemming, Eva; Nälsén, Cecilia; Becker, Wulf; Ridefelt, Peter et al.

Part of Journal of Nutritional Science, 2015

• DOI for Relative validation of the dietary intake of fatty acids among adults in the Swedish National Dietary Survey using plasma phospholipid fatty acid composition.
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Reference intervals for parathyroid hormone for 70-year-old males and females: exclusion of individuals from the reference interval based on sex, calcium, diabetes, cardiovascular diseases or reduced kidney function has limited effects on the interval

Larsson, Anders; Ridefelt, Peter; Melhus, Håkan; Lind, Lars

Part of Annals of Clinical Biochemistry, p. 39-43, 2015

• DOI for Reference intervals for parathyroid hormone for 70-year-old males and females: exclusion of individuals from the reference interval based on sex, calcium, diabetes, cardiovascular diseases or reduced kidney function has limited effects on the interval

Pediatric reference intervals - The Swedish experience

Ridefelt, Peter

Part of Clinical Biochemistry, p. 740-741, 2014

• DOI for Pediatric reference intervals - The Swedish experience

Increased plasma glucose levels after change of recommendation from NaF to citrate blood collection tubes

Ridefelt, Peter; Åkerfeldt, Torbjörn; Helmersson-Karlqvist, Johanna

Part of Clinical Biochemistry, p. 625-628, 2014

• DOI for Increased plasma glucose levels after change of recommendation from NaF to citrate blood collection tubes

Alkaline phosphatase in healthy children: reference intervals and prevalence of elevated levels.

Ridefelt, Peter; Gustafsson, Jan; Aldrimer, Mattias; Hellberg, Dan

Part of Hormone Research in Paediatrics, p. 399-404, 2014

• DOI for Alkaline phosphatase in healthy children: reference intervals and prevalence of elevated levels.

Differential diagnostic yield of lumbar puncture in investigation of suspected subarachnoid haemorrhage: a retrospective study

Brunell, Anna; Ridefelt, Peter; Zelano, Johan

Part of Journal of Neurology, p. 1631-1636, 2013

• DOI for Differential diagnostic yield of lumbar puncture in investigation of suspected subarachnoid haemorrhage: a retrospective study

Referensintervall för barn för vanliga klinisk-kemiska analyser

Ridefelt, Peter; Aldrimer, Mattias; Rödöö, Peo; Gustafsson, Jan et al.

Part of Läkartidningen, p. 1927-1930, 2013

Biomonitoring study of deoxynivalenol exposure and association with typical cereal consumption in Swedish adults

Wallin, S.; Hardie, L. J.; Kotova, N.; Warensjö-Lemming, Eva et al.

Part of World Mycotoxin Journal, p. 439-448, 2013

• DOI for Biomonitoring study of deoxynivalenol exposure and association with typical cereal consumption in Swedish adults

Population-based pediatric reference intervals for HbA1c, bilirubin, albumin, CRP, myoglobin and serum enzymes

Rodoo, Peo; Ridefelt, Peter; Aldrimer, Mattias; Niklasson, Frank et al.

Part of Scandinavian Journal of Clinical and Laboratory Investigation, p. 361-367, 2013

• DOI for Population-based pediatric reference intervals for HbA1c, bilirubin, albumin, CRP, myoglobin and serum enzymes

Population-based pediatric reference intervals for hematology, iron and transferrin

Aldrimer, Mattias; Ridefelt, Peter; Rodoo, Peo; Niklasson, Frank et al.

Part of Scandinavian Journal of Clinical and Laboratory Investigation, p. 253-261, 2013

• DOI for Population-based pediatric reference intervals for hematology, iron and transferrin

Referensintervall för barn för vanliga klinisk-kemiska analyser: [Pediatric reference ranges for clinical chemistry analyzes]

Ridefelt, Peter; Aldrimer, Mattias; Rödöö, Peo; Gustafsson, Jan et al.

Part of Läkartidningen, p. 1927-1930, 2013

Kreatininvärden bör kompletteras med GFR-beräkningar: [Creatinine values ​​should be complemented with GFR estimates]

Ridefelt, Peter; Aldrimer, Mattias; Gustafsson, Jan; Hellberg, Dan

Part of Läkartidningen, 2013

Diurnal variability of total calcium during normal sleep and after an acute shift of sleep

Ridefelt, Peter; Axelsson, John; Larsson, Anders

Part of Clinical Chemistry and Laboratory Medicine, p. 147-151, 2012

• DOI for Diurnal variability of total calcium during normal sleep and after an acute shift of sleep

Population-based pediatric reference intervals for general clinical chemistry analytes on the Abbott Architect ci8200 instrument

Ridefelt, Peter; Aldrimer, Mattias; Rodoo, Per-Olof; Niklasson, Frank et al.

Part of Clinical Chemistry and Laboratory Medicine, p. 845-851, 2012

• DOI for Population-based pediatric reference intervals for general clinical chemistry analytes on the Abbott Architect ci8200 instrument

Reference intervals on the Abbot Architect for serum thyroid hormones, lipids and prolactin in healthy children in a population-based study

Aldrimer, Mattias; Ridefelt, Peter; Rodoo, Peo; Niklasson, Frank et al.

Part of Scandinavian Journal of Clinical and Laboratory Investigation, p. 326-332, 2012

• DOI for Reference intervals on the Abbot Architect for serum thyroid hormones, lipids and prolactin in healthy children in a population-based study

Influences of sleep and the circadian rhythm on iron-status indices

Ridefelt, Peter; Larsson, Anders; Rehman, Javaid-ur; Axelsson, John

Part of Clinical Biochemistry, p. 1323-1328, 2010

• DOI for Influences of sleep and the circadian rhythm on iron-status indices

Circadian variability of bilirubin in healthy men during normal sleep and after an acute shift of sleep

Larsson, Anders; Hassan, Moustapha; Ridefelt, Peter; Axelsson, John

Part of Chronobiology International, p. 1613-1621, 2009

• DOI for Circadian variability of bilirubin in healthy men during normal sleep and after an acute shift of sleep

Fecal markers of inflammation used as surrogate markers for treatment outcome in relapsing inflammatory bowel disease

Wagner, Michael; Peterson, Christer G. B.; Ridefelt, Peter; Sangfelt, Per et al.

Part of World Journal of Gastroenterology, p. 5584-5589, 2008

• DOI for Fecal markers of inflammation used as surrogate markers for treatment outcome in relapsing inflammatory bowel disease

Lactose intolerance: lactose tolerance test versus genotyping

Ridefelt, Peter; Håkansson, Lena D

Part of Scand J Gastroenterol, p. 822-6, 2005

Antithrombin administration during experimental cardiopulmonary resuscitation

Johansson, Jakob; Ridefelt, Peter; Basu, Samar; Rubertsson, Sten

Part of Resuscitation, p. 71-78, 2004

• DOI for Antithrombin administration during experimental cardiopulmonary resuscitation

Different secretory actions of pancreastatin in bovine and human parathyroid cells.

Ridefelt, P; Hellman, Per; Stridsberg, M; Åkerström, Göran et al.

Part of Biosci Rep, p. 221-9, 1994

Identification of cystatin C as a new marker of glomerular filtration rate, and of shrunken pore syndrome - a new kidney disorder defining selective glomerular hypofiltration syndromes - calls for expansion of the international KDIGO guidelines

Åkesson, Anna; Öberg, Carl; Malmgren, Linnea; Nilsson, Christopher et al.

Part of Scandinavian Journal of Clinical and Laboratory Investigation, p. 409-419, 2025

• DOI for Identification of cystatin C as a new marker of glomerular filtration rate, and of shrunken pore syndrome - a new kidney disorder defining selective glomerular hypofiltration syndromes - calls for expansion of the international KDIGO guidelines
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Estimating reliable paediatric reference intervals in clinical chemistry and haematology

Ridefelt, Peter; Hellberg, Dan; Aldrimer, Mattias; Gustafsson, Jan

Part of Acta Paediatrica, p. 10-15, 2014

• DOI for Estimating reliable paediatric reference intervals in clinical chemistry and haematology

NT-proBNP and its correlation to left ventricular ejection fraction and heart failure – the DEMONSTRATE database

Lundgren, Morgan; Ridefelt, Peter; Svensson, Maria K.; Hagström, Emil et al.