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List of works by Christine M. Pfeiffer

A Daily Dose of 5 mg Folic Acid for 90 Days Is Associated with Increased Serum Unmetabolized Folic Acid and Reduced Natural Killer Cell Cytotoxicity in Healthy Brazilian Adults

scientific article

A Dual-Label Stable-Isotopic Protocol Is Suitable for Determination of Folate Bioavailability in Humans: Evaluation of Urinary Excretion and Plasma Folate Kinetics of Intravenous and Oral Doses of [13C5] and [2H2]Folic Acid ⬇️

scientific article published on 01 December 1997

A Method-bridging Study for Serum 25-hydroxyvitamin D to Standardize Historical Radioimmunoassay Data to Liquid Chromatography-Tandem Mass Spectrometry

scientific article

A candidate reference measurement procedure for quantifying serum concentrations of 25-hydroxyvitamin D₃ and 25-hydroxyvitamin D₂ using isotope-dilution liquid chromatography-tandem mass spectrometry

scientific article

A high-throughput LC-MS/MS method suitable for population biomonitoring measures five serum folate vitamers and one oxidation product ⬇️

scientific article published on 06 March 2013

A multicenter analytical performance evaluation of a multiplexed immunoarray for the simultaneous measurement of biomarkers of micronutrient deficiency, inflammation and malarial antigenemia

scientific article published on 04 November 2021

A simplified protein precipitation and filtration procedure for determining serum vitamin B6 by high-performance liquid chromatography.

scientific article published on 14 February 2009

Absorption of folate from fortified cereal-grain products and of supplemental folate consumed with or without food determined by using a dual-label stable-isotope protocol ⬇️

scientific article published on December 1, 1997

Accounting for an Isobaric Interference Allows Correct Determination of Folate Vitamers in Serum by Isotope Dilution-Liquid Chromatography-Tandem MS ⬇️

scientific article published on November 21, 2012

Addition of Exogenous γ-Glutamyl Hydrolase Eliminates the Need for Lengthy Incubation of Whole-Blood Lysate for Quantitation of Folate Vitamers by High-Performance Liquid Chromatography-Tandem Mass Spectrometry

Affinity extraction combined with stable isotope dilution LC/MS for the determination of 5-methyltetrahydrofolate in human plasma

scientific article

Age-specific Serum Methylmalonic Acid Reference Ranges for More Accurate Interpretation of Vitamin B-12 Status in U.S. Adults (P24-030-19)

Age-specific reference ranges are needed to interpret serum methylmalonic acid concentrations in the US population

scientific article published on 01 July 2019

Among 10 Sociodemographic and Lifestyle Variables, Smoking Is Strongly Associated with Biomarkers of Acrylamide Exposure in a Representative Sample of the U.S. Population ⬇️

scientific article published on April 17, 2013

An HPLC Ultraviolet Method Using Low Sample Volume and Protein Precipitation for the Measurement of Retinol in Human Serum Suitable for Laboratories in Low- and Middle-Income Countries

scientific article published on 11 March 2019

An LC-MS/MS method for serum methylmalonic acid suitable for monitoring vitamin B12 status in population surveys

scientific article published on 26 September 2014

Analysis of aflatoxin B1-lysine adduct in serum using isotope-dilution liquid chromatography/tandem mass spectrometry

scientific article published in January 2005

Analysis of factors influencing the comparison of homocysteine values between the Third National Health and Nutrition Examination Survey (NHANES) and NHANES 1999+.

scientific article published in November 2000

Anemia and Vitamin B12 and Folate Status in Women of Reproductive Age in Southern India (P10-101-19)

Applying inappropriate cutoffs leads to misinterpretation of folate status in the US population

scientific article published on 28 September 2016

Assessing U.S. sodium intake through dietary data and urine biomarkers

scientific article

Assessing the influence of 5,10-methylenetetrahydrofolate reductase polymorphism on folate stability during long-term frozen storage, thawing, and repeated freeze/thawing of whole blood ⬇️

scientific article published on February 10, 2012

Assessing vitamin status in large population surveys by measuring biomarkers and dietary intake – two case studies: folate and vitamin D ⬇️

scientific article published on April 2, 2012

Assessment of iron deficiency in US preschool children and nonpregnant females of childbearing age: National Health and Nutrition Examination Survey 2003-2006.

scientific article published on 8 April 2009

Assessment of iron status in US pregnant women from the National Health and Nutrition Examination Survey (NHANES), 1999–2006 ⬇️

scientific article published on March 23, 2011

Association between Serum Unmetabolized Folic Acid Concentrations and Folic Acid from Fortified Foods.

scientific article published on 12 September 2017

Biochemical indicators of B vitamin status in the US population after folic acid fortification: results from the National Health and Nutrition Examination Survey 1999-2000.

scientific article published in August 2005

Biomarkers of Nutrition for Development (BOND)-Iron Review

article

Biomarkers of Nutrition for Development-Folate Review

scientific article

Biomarkers of folate status in NHANES: a roundtable summary

scientific article

Biomarkers of vitamin B-12 status in NHANES: a roundtable summary

scientific article

Blood folate levels: the latest NHANES results.

scientific article published in May 2008

Blood levels of folate at birth and risk of childhood leukemia

scientific article published on 10 April 2013

Brief report: are autistic-behaviors in children related to prenatal vitamin use and maternal whole blood folate concentrations?

scientific article

Challenges and Lessons Learned in Generating and Interpreting NHANES Nutritional Biomarker Data

scientific article

Changes in Measurement Procedure from a Radioassay to a Microbiologic Assay Necessitate Adjustment of Serum and RBC Folate Concentrations in the U.S. Population from the NHANES 1988–2010 , ⬇️

scientific article published on March 21, 2012

Changes in the concentrations of biochemical indicators of diet and nutritional status of pregnant women across pregnancy trimesters in Trujillo, Peru, 2004–2005 ⬇️

scientific article published on June 11, 2013

Clinical analysis of vitamin B(6): determination of pyridoxal 5'-phosphate and 4-pyridoxic acid in human serum by reversed-phase high-performance liquid chromatography with chlorite postcolumn derivatization

scientific article published in October 2004

Clinical vitamin B6 analysis: an interlaboratory comparison of pyridoxal 5'-phosphate measurements in serum

scientific article published on 19 May 2005

Combined measurement of ferritin, soluble transferrin receptor, retinol binding protein, and C-reactive protein by an inexpensive, sensitive, and simple sandwich enzyme-linked immunosorbent assay technique

scientific article

Commutability of NIST SRM 1955 Homocysteine and Folate in Frozen Human Serum with selected total homocysteine immunoassays and enzymatic assays

scientific article published on 29 May 2008

Comparing the ESA HPLC total homocysteine assay with electrochemical detection to the CDC in-house HPLC assay with fluorescence detection

scientific article

Comparison of Serum and Red Blood Cell Folate Microbiologic Assays for National Population Surveys ⬇️

scientific article published on May 25, 2011

Comparison of isotope dilution mass spectrometry methods for the determination of total homocysteine in plasma and serum

scientific article published in September 2003

Comparison of plasma total homocysteine measurements in 14 laboratories: an international study

scientific article published in August 1999

Comparison of serum and plasma methylmalonic acid measurements in 13 laboratories: An international study

scientific article published in December 1999

Comparison of serum folate species analyzed by LC-MS/MS with total folate measured by microbiologic assay and Bio-Rad radioassay

scientific article published on February 2007

Consumption of Folic Acid–Fortified Bread Improves Folate Status in Women of Reproductive Age in Chile ⬇️

scientific article published on October 1, 2003

Contributions of enriched cereal-grain products, ready-to-eat cereals, and supplements to folic acid and vitamin B-12 usual intake and folate and vitamin B-12 status in US children: National Health and Nutrition Examination Survey (NHANES), 2003-200

scientific article published on 17 November 2010

Correspondence of folate dietary intake and biomarker data.

scientific article

Daily supplementation with 5 mg of folic acid in Brazilian patients with hereditary spherocytosis

article

Data advisory with regard to NHANES serum 25-hydroxyvitamin D data

scientific article published on 01 July 2009

Demographic, Physiologic, and Lifestyle Characteristics Observed with Serum Total Folate Differ Among Folate Forms: Cross-Sectional Data from Fasting Samples in the NHANES 2011-2016

scientific article published on 01 April 2020

Determination of Folate in Cereal-Grain Food Products Using Trienzyme Extraction and Combined Affinity and Reversed-Phase Liquid Chromatography

Determination of folate vitamers in human serum by stable-isotope-dilution tandem mass spectrometry and comparison with radioassay and microbiologic assay

scientific article published on 11 December 2003

Determination of urinary phytoestrogens by HPLC-MS/MS: a comparison of atmospheric pressure chemical ionization (APCI) and electrospray ionization (ESI).

scientific article

Determination of urine caffeine and its metabolites by use of high-performance liquid chromatography-tandem mass spectrometry: estimating dietary caffeine exposure and metabolic phenotyping in population studies.

scientific article

Development and Certification of a Standard Reference Material for Vitamin D Metabolites in Human Serum ⬇️

scientific article published on December 28, 2011

Development and evaluation of an isotope dilution LC/MS method for the determination of total homocysteine in human plasma

scientific article published in February 2003

Development of a Standard Reference Material for metabolomics research

scientific article published on 3 December 2013

Development of a new standard reference material: SRM 1955 (homocysteine and folate in human serum)

scientific article published on 29 April 2006

Dietary supplement use and smoking are important correlates of biomarkers of water-soluble vitamin status after adjusting for sociodemographic and lifestyle variables in a representative sample of U.S. adults.

scientific article published on 10 April 2013

Does obesity modify the association of supplemental folic acid with folate status among nonpregnant women of childbearing age in the United States?

scientific article published on 29 May 2012

Effects of delayed sample processing and freezing on serum concentrations of selected nutritional indicators

scientific article published on 29 August 2008

Effects of preanalytical factors on hemoglobin measurement: A comparison of two HemoCue® point-of-care analyzers

scientific article published on 12 April 2017

Enzymatic deconjugation of erythrocyte polyglutamyl folates during preparation for folate assay: investigation with reversed-phase liquid chromatography

scientific article published on 01 November 1996

Erythrocyte folate extraction and quantitative determination by liquid chromatography-tandem mass spectrometry: comparison of results with microbiologic assay

scientific article

Estimated 24-Hour Urinary Sodium and Potassium Excretion in US Adults

scientific article published on 7 March 2018

Estimating the population distribution of usual 24-hour sodium excretion from timed urine void specimens using a statistical approach accounting for correlated measurement errors

scientific article published on April 2015

Estimation of trends in serum and RBC folate in the U.S. population from pre- to postfortification using assay-adjusted data from the NHANES 1988-2010

scientific article

Evaluation of an automated soluble transferrin receptor (sTfR) assay on the Roche Hitachi analyzer and its comparison to two ELISA assays

scientific article published on 24 April 2007

Evaluation of the Drew Scientific ds30 homocysteine assay in comparison with the Centers for Disease Control and prevention reference HPLC method.

scientific article published in May 2001

Folate and Vitamin B12 Deficiency Among Non-pregnant Women of Childbearing-Age in Guatemala 2009-2010: Prevalence and Identification of Vulnerable Populations

scientific article

Folate and Vitamin B12 Status in Women of Reproductive Age in Rural Areas in Haryana, Northern India (P10-117-19)

Folate is absorbed across the colon of adults: evidence from cecal infusion of (13)C-labeled [6S]-5-formyltetrahydrofolic acid.

scientific article published on 13 May 2009

Folate is absorbed across the human colon: evidence by using enteric-coated caplets containing 13C-labeled [6S]-5-formyltetrahydrofolate

scientific article published on 3 September 2014

Folate status and concentrations of serum folate forms in the US population: National Health and Nutrition Examination Survey 2011-2

scientific article published on 28 April 2015

Folate status in the US population 20 y after the introduction of folic acid fortification

scientific article published on 01 November 2019

Folic acid fortification

Folic acid source, usual intake, and folate and vitamin B-12 status in US adults: National Health and Nutrition Examination Survey (NHANES) 2003-2006.

scientific article published on 14 October 2009

Framework for laboratory harmonization of folate measurements in low- and middle-income countries and regions

scientific article published on 29 January 2018

Global folate status in women of reproductive age: a systematic review with emphasis on methodological issues

scholarly article by Lisa M Rogers et al published 21 September 2018 in Annals of the New York Academy of Sciences

Harmonizing the Calibrator and Microorganism Used in the Folate Microbiological Assay Increases the Comparability of Serum and Whole-Blood Folate Results in a CDC Round-Robin Study

scientific article published on 01 May 2018

Hematological and iron-related analytes--reference data for persons aged 1 year and over: United States, 1988-94.

scientific article

Higher urinary lignan concentrations in women but not men are positively associated with shorter time to pregnancy

scientific article

Homocysteine and vitamin B12 concentrations and mortality rates in type 2 diabetes

article

Homocysteine as a risk factor for nephropathy and retinopathy in Type 2 diabetes.

scientific article

Influence of 5,10-methylenetetrahydrofolate reductase polymorphism on whole-blood folate concentrations measured by LC-MS/MS, microbiologic assay, and bio-rad radioassay ⬇️

scientific article published in January 2008

International Standard for serum vitamin B(12) and serum folate: international collaborative study to evaluate a batch of lyophilised serum for B(12) and folate content

scientific article published in January 2007

Interpretation of vitamin B-12 and folate concentrations in population-based surveys does not require adjustment for inflammation: Biomarkers Reflecting Inflammation and Nutritional Determinants of Anemia (BRINDA) project

scientific article published on 01 April 2020

Iron-status indicators

scientific article published on 01 March 2008

Isotope Dilution–LC-MS/MS Reference Method Assessment of Serum Folate Assay Accuracy and Proficiency Testing Consensus Mean ⬇️

scientific article published on May 5, 2011

Isotope dilution ultra performance liquid chromatography-tandem mass spectrometry method for simultaneous measurement of 25-hydroxyvitamin D2, 25-hydroxyvitamin D3 and 3-epi-25-hydroxyvitamin D3 in human serum ⬇️

scientific article published on May 13, 2011

Knowledge gaps in understanding the metabolic and clinical effects of excess folates/folic acid: a summary, and perspectives, from an NIH workshop

scientific article published on 06 October 2020

Laboratory capacity-building initiative to assess folate status in women of reproductive age from Haryana, India: the collaborative experience of local and international partners

scholarly article published 8 December 2017

Laboratory methodologies for indicators of iron status: strengths, limitations, and analytical challenges

scientific article

Measurement of 25-hydroxyvitamin D3 (25OHD3) and 25-hydroxyvitamin D2 (25OHD2) in human serum using liquid chromatography-tandem mass spectrometry and its comparison to a radioimmunoassay method

scientific article

Measurement of folates in serum and conventionally prepared whole blood lysates: application of an automated 96-well plate isotope-dilution tandem mass spectrometry method

scientific article published on 30 September 2004

Method comparison for total plasma homocysteine between the Abbott IMx analyzer and an HPLC assay with internal standardization

scientific article published on 01 January 1999

Modeling a methylmalonic acid-derived change point for serum vitamin B-12 for adults in NHANES

scientific article published on 26 June 2013

Monitoring of vitamin B-12 nutritional status in the United States by using plasma methylmalonic acid and serum vitamin B-12 ⬇️

scientific article published on June 15, 2011

NHANES monitoring of serum 25-hydroxyvitamin D: a roundtable summary

scientific article

National Estimates of Serum Total 25-Hydroxyvitamin D and Metabolite Concentrations Measured by Liquid Chromatography-Tandem Mass Spectrometry in the US Population during 2007-2010.

scientific article published on 6 April 2016

Neither folic acid supplementation nor pregnancy affects the distribution of folate forms in the red blood cells of women

scientific article published on 2 July 2014

Periconceptional surveillance for prevention of anaemia and birth defects in Southern India: protocol for a biomarker survey in women of reproductive age

scientific article published on 29 October 2020

Phytoestrogen biomonitoring: an extractionless LC-MS/MS method for measuring urinary isoflavones and lignans by use of atmospheric pressure photoionization (APPI).

scientific article

Population RBC folate concentrations can be accurately estimated from measured whole blood folate, measured hemoglobin, and predicted serum folate-cross-sectional data from the NHANES 1988-2010

scientific article published on 01 March 2020

Preparation of stable isotopically labeled folates for in vivo investigation of folate absorption and metabolism

scientific article published on 01 January 1997

Quality specifications and their daily application to evaluate the accuracy of reference measurements for serum concentrations of 25-hydroxyvitamin D and 25-hydroxyvitamin D

scientific article published on 04 October 2018

Race-Ethnicity Is Related to Biomarkers of Iron and Iodine Status after Adjusting for Sociodemographic and Lifestyle Variables in NHANES 2003–2006 ⬇️

scientific article published on April 17, 2013

Race-ethnicity is a strong correlate of circulating fat-soluble nutrient concentrations in a representative sample of the U.S. population

scientific article published on 17 April 2013

Rapid and accurate HPLC assay for plasma total homocysteine and cysteine in a clinical laboratory setting

scientific article published on 01 February 1999

Regression Modeling Plan for 29 Biochemical Indicators of Diet and Nutrition Measured in NHANES 2003–2006 ⬇️

scientific article published on April 17, 2013

Reply to S Ferraro and M Panteghini

scientific article published on 01 September 2019

Selected Physiologic Variables Are Weakly to Moderately Associated with 29 Biomarkers of Diet and Nutrition, NHANES 2003–2006 ⬇️

scientific article published on April 17, 2013

Serum 25-hydroxyvitamin D status of the US population: 1988-1994 compared with 2000-2004.

scientific article published on December 2008

Serum Folate Forms Are Stable during Repeated Analysis in the Presence of Ascorbic Acid and during Frozen Sample Storage

scientific article published on 12 October 2018

Serum Iron and Iron-binding Capacity: A Round-Robin Interlaboratory Comparison Study ⬇️

scientific article published on 01 October 2003

Serum Sodium and Potassium Distribution and Characteristics in the US Population, National Health and Nutrition Examination Survey 2009-2016

scientific article published on 23 November 2020

Serum concentrations of an aflatoxin-albumin adduct in the National Health and Nutrition Examination Survey (NHANES) 1999–2000 ⬇️

scientific article published on April 20, 2013

Serum cotinine and whole blood folate concentrations in pregnancy

scientific article

Serum soluble transferrin receptor concentrations in US preschool children and non-pregnant women of childbearing age from the National Health and Nutrition Examination Survey 2003-2010.

scientific article

Serum unmetabolized folic acid in a nationally representative sample of adults ≥60 years in the United States, 2001–2002 ⬇️

scientific article published on April 2, 2012

Sociodemographic and Lifestyle Variables Are Compound- and Class-Specific Correlates of Urine Phytoestrogen Concentrations in the U.S. Population ⬇️

scientific article published on April 17, 2013

Solid-phase extraction-electrospray ionization mass spectrometry for the quantification of folate in human plasma or serum

scientific article

The CDC VITAL-EQA program, external quality assurance for serum retinol, 2003-2006.

scientific article published on 15 January 2008

The CDC's Second National Report on Biochemical Indicators of Diet and Nutrition in the U.S. Population is a valuable tool for researchers and policy makers.

scientific article published on 17 April 2013

The Quansys multiplex immunoassay for serum ferritin, C-reactive protein, and α-1-acid glycoprotein showed good comparability with reference-type assays but not for soluble transferrin receptor and retinol-binding protein

scientific article published on 29 April 2019

The Validity of Predictive Equations to Estimate 24-Hour Sodium Excretion: The MESA and CARDIA Urinary Sodium Study

scientific article

The association between circulating total folate and folate vitamers with overall survival after postmenopausal breast cancer diagnosis

scientific article

The direction of the difference between Canadian and American erythrocyte folate concentrations is dependent on the assay method employed: a comparison of the Canadian Health Measures Survey and National Health and Nutrition Examination Survey

scientific article published on 8 October 2014

The loss of 5-methyltetrahydrofolate in human serum under suboptimal preanalytical conditions can only partially be recovered by an oxidation product

scientific article published on 17 September 2014

The night vision threshold test is a better predictor of low serum vitamin A concentration than self-reported night blindness in pregnant urban Nepalese women

scientific article

The prevalence of low serum vitamin B-12 status in the absence of anemia or macrocytosis did not increase among older U.S. adults after mandatory folic acid fortification

scientific article published on 04 December 2013

The vitamin D status of the US population from 1988 to 2010 using standardized serum concentrations of 25-hydroxyvitamin D shows recent modest increases

scientific article published on 6 July 2016

Trends in blood folate and vitamin B-12 concentrations in the United States, 1988 2004.

scientific article published in September 2007

Trends in circulating concentrations of total homocysteine among US adolescents and adults: findings from the 1991-1994 and 1999-2004 National Health and Nutrition Examination Surveys

scientific article published on 28 March 2008

Two International Round-Robin Studies Showed Good Comparability of 5-Methyltetrahydrofolate but Poor Comparability of Folic Acid Measured in Serum by Different High-Performance Liquid Chromatography-Tandem Mass Spectrometry Methods

scientific article published on 2 August 2017

Unmetabolized folic acid is detected in nearly all serum samples from US children, adolescents, and adults

scientific article

Unmetabolized serum folic acid and its relation to folic acid intake from diet and supplements in a nationally representative sample of adults aged > or =60 y in the United States

scientific article

Urinary Excretion of Sodium, Potassium, and Chloride, but Not Iodine, Varies by Timing of Collection in a 24-Hour Calibration Study1–3 ⬇️

scientific article published on June 12, 2013

Urine excretion of caffeine and select caffeine metabolites is common in the U.S. population and associated with caffeine intake

scientific article published on 4 February 2015

Urine sodium excretion increased slightly among U.S. adults between 1988 and 2010.

scientific article published on 12 March 2014

Validity of predictive equations for 24-h urinary sodium excretion in adults aged 18-39 y.

scientific article published on 18 September 2013

Vitamin D status in the United States, 2011-2014

scientific article published on 01 July 2019

Vitamin D status: United States, 2001-2006

scientific article published on March 1, 2011

Zinc and iron deficiency and their interrelations in low-income African American and Hispanic children in Atlanta

scientific article

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