Research Topics
Species | S P CaudillSummaryAffiliation: Centers for Disease Control and Prevention Country: USA Publications
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Publications
Important issues related to using pooled samples for environmental chemical biomonitoringSamuel P Caudill
National Center for Environmental Health, Centers for Disease Control and Prevention, Public Health Service, U S Department of Health and Human Services, Atlanta, GA 30333, USA
Stat Med 30:515-21. 2011..The findings are illustrated by using pooled samples from the National Health and Nutrition Examination Survey 2001-2002 to assess exposures to perfluorooctanesulfonate and other polyfluoroalkyl compounds in the U.S. population...- Use of pooled samples from the national health and nutrition examination surveySamuel P Caudill
Division of Laboratory Sciences, National Center for Environmental Health, Centers for Disease Control and Prevention, Public Health Service, US Department of Health and Human Services, Atlanta, GA 30333, U S A
Stat Med 31:3269-77. 2012..At a cost of $1400 per analytical measurement, this represents a savings of approximately $2.78 million. Published 2012. This article is a US Government work and is in the public domain in the USA... 
Assessment of current National Cholesterol Education Program guidelines for total cholesterol triglyceride, HDL-cholesterol, and LDL-cholesterol measurementsS P Caudill
Environmental Health Laboratory Sciences Division, National Center for Environmental Health, National Centers for Disease Control and Prevention, Atlanta, GA 30341 3724, USA
Clin Chem 44:1650-8. 1998....- Multi-rule quality control for the age-related eye disease studySamuel P Caudill
Division of Laboratory Sciences, National Center for Environmental Health, Centers for Disease Control and Prevention, Public Health Service, U S Department of Health and Human Services, Atlanta, GA 30333, USA
Stat Med 27:4094-106. 2008..We also provide operating characteristics to demonstrate how the MRQCS responds to increases in systematic and/or random error... - Geometric mean estimation from pooled samplesSamuel P Caudill
Division of Laboratory Sciences, National Center for Environmental Health, Centers for Disease Control and Prevention, 4770 Buford Highway NE, Atlanta, GA 30341, United States
Chemosphere 69:371-80. 2007..We also present estimates for levels of PCB 153 and p,p'-DDE using data from pooled samples from the 2001 to 2002 National Health and Nutrition Examination Surveys... - Characterizing populations of individuals using pooled samplesSamuel P Caudill
Division of Laboratory Sciences, National Center for Environmental Health, Centers for Disease Control and Prevention, Atlanta, Georgia, USA
J Expo Sci Environ Epidemiol 20:29-37. 2010..Using pooled samples to characterize populations is not only more cost-efficient, but also in some cases it can lead to more precise and less biased parameter estimation than that occurs with individual samples... - Contaminants in L-tryptophan associated with eosinophilia myalgia syndromeR H Hill
Division of Environmental Health Laboratory Sciences, Centers for Disease Control and Prevention, Atlanta, Georgia 30333
Arch Environ Contam Toxicol 25:134-42. 1993..K., and that six of these contaminants were associated with EMS. The structures of three contaminants are known, but the identities of the other three contaminants are currently unknown.(ABSTRACT TRUNCATED AT 250 WORDS).. - Serum levels of several organochlorine pesticides in farmers correspond with dietary exposure and local use historyJ W Brock
National Center for Environmental Health NCEH, Centers for Disease Control, Atlanta, GA 30341, USA
Toxicol Ind Health 14:275-89. 1998..Previous reported use of chlordane on the North Carolina farms corresponded with measurable dietary levels of chlordance and higher serum trans-nonachlor levels than the levels in Iowa farm families... - Total TEQ reference range (PCDDs, PCDFs, cPCBs, mono-PCBs) for the US population 2001-2002Donald G Patterson
Organic Analytical Toxicology Branch, Division of Laboratory Sciences, National Center for Environmental Health, Centers for Disease Control and Prevention, 4770 Buford Highway, NE, Mail Stop F 17, Atlanta, GA 30341, United States
Chemosphere 73:S261-77. 2008..In the pools, as age increases the percent contribution of the PCDD TEQ levels increases while the percent contribution of the PCDF TEQ levels decreases for all race/ethnicity and sex strata... 
Urinary levels of seven phthalate metabolites in the U.S. population from the National Health and Nutrition Examination Survey (NHANES) 1999-2000Manori J Silva
Division of Laboratory Sciences, National Center for Environmental Health, Centers for Disease Control and Prevention, 4770 Buford Highway NE, Atlanta, GA 30341, USA
Environ Health Perspect 112:331-8. 2004....- Levels of 1-hydroxypyrene and other monohydroxy polycyclic aromatic hydrocarbons in children: a study based on U.S. reference range valuesWenlin Huang
National Center for Environmental Health, Centers for Disease Control and Prevention, 4770 Buford Hwy NE, Mailstop F-47, Atlanta, GA 30341, USA
Toxicol Lett 163:10-9. 2006..These results may indicate that young children are at a greater risk for PAH exposure, or that they absorb, distribute, metabolize, or eliminate PAH differently than adults... - Tryptophan contaminants associated with eosinophilia-myalgia syndrome. The Eosinophilia-Myalgia Studies of Oregon, New York and New MexicoR M Philen
Division of Environmental Hazards and Health Effects, National Center for Environmental Health, Centers for Disease Control and Prevention, Atlanta, GA 30341 3724
Am J Epidemiol 138:154-9. 1993.... - Prevalence of C282Y and H63D mutations in the hemochromatosis (HFE) gene in the United StatesK K Steinberg
Molecular Biology Branch, National Center for Environmental Health, Mailstop F 24, Chamblee, GA 30341, USA
JAMA 285:2216-22. 2001..Population-based estimates of the prevalence of disease-associated mutations, such as hemochromatosis (HFE) gene mutations, are needed to determine the usefulness of genetic screening... - Percentile estimation using variable censored dataSamuel P Caudill
Division of Laboratory Sciences, National Center for Environmental Health, Centers for Disease Control and Prevention, 4770 Buford Highway NE, Atlanta, GA 30341, USA
Chemosphere 68:169-80. 2007..Because the congener measurements used in this study were subject to variable LODs, we also present simulation results to demonstrate the effect of variable LODs on the multiple-imputation process... - Serum concentrations of 11 polyfluoroalkyl compounds in the u.s. population: data from the national health and nutrition examination survey (NHANES)Antonia M Calafat
Division of Laboratory Sciences, National Center for Environmental Health, Centers for Disease Control and Prevention, Atlanta, Georgia 30341, USA
Environ Sci Technol 41:2237-42. 2007.... - Reference range levels of polycyclic aromatic hydrocarbons in the US population by measurement of urinary monohydroxy metabolitesJames Grainger
Division of Environment Health Laboratory Sciences, National Center for Environmental Health, Centers for Disease Control and Prevention, Atlanta, GA 30341, USA
Environ Res 100:394-423. 2006..Our study results enabled us to establish a reference range for the targeted PAHs in the general US population... - Evaluation of maximum likelihood procedures to estimate left censored observationsRam B Jain
Centers for Disease Control and Prevention, 4770 Buford Highway, Chamblee, GA 30329, USA
Anal Chem 80:1124-32. 2008..These findings support earlier observations, and they suggest that MLE with multiple imputations is the preferred method to estimate mean and SD when the frequency of left censored observations in the population is < or =40%... - Perfluorochemicals in pooled serum samples from United States residents in 2001 and 2002Antonia M Calafat
Division of Laboratory Sciences, National Center for Environmental Health, Centers for Disease Control and Prevention, Atlanta, Georgia, USA
Environ Sci Technol 40:2128-34. 2006..These findings indicate different patterns of human exposure to PFCs among the population groups examined and stress the importance of conducting research to identify the environmental sources and pathways of human exposure to PFCs... - Concentration and profile of 22 urinary polycyclic aromatic hydrocarbon metabolites in the US populationZheng Li
Centers for Disease Control and Prevention, National Center for Environmental Health, 4770 Buford Highway, F53 Atlanta, GA 30341, USA
Environ Res 107:320-31. 2008..The correlation coefficients between 1-PYR and other metabolites ranging from 0.17 to 0.63 support the use of 1-PYR as a useful surrogate representing PAH exposure... - Levels of urinary total and speciated arsenic in the US population: National Health and Nutrition Examination Survey 2003-2004Kathleen L Caldwell
Division of Laboratory Sciences, National Center for Environmental Health, Centers for Disease Control and Prevention, Atlanta, Georgia 30341, USA
J Expo Sci Environ Epidemiol 19:59-68. 2009..To provide levels of total and speciated urinary arsenic in a representative sample of the US population... - Perchlorate, nitrate, thiocyanate, and iodide levels in chicken feed, water, and eggs from three farmsBenjamin C Blount
Division of Laboratory Sciences, Centers for Disease Control and Prevention, Atlanta, Georgia 30341, USA
J Agric Food Chem 56:10709-15. 2008..225). From these findings it was concluded that, although chickens secrete perchlorate in eggs, eggs do not appear to be a significant source of perchlorate exposure for adults in the United States... - Standardization of high-sensitivity immunoassays for measurement of C-reactive protein; II: Two approaches for assessing commutability of a reference materialMary M Kimberly
Division of Laboratory Sciences, National Center for Environmental Health, Centers for Disease Control and Prevention, Atlanta, GA 30341 3724, USA
Clin Chem 55:342-50. 2009..We also investigated whether calibration by use of PRM was effective in harmonizing results... - Total blood mercury concentrations in the U.S. population: 1999-2006Kathleen L Caldwell
Division of Laboratory Sciences, National Center for Environmental Health, CDC, 4770 Buford Highway, NE, Mailstop F 18, Atlanta, GA 30341, USA
Int J Hyg Environ Health 212:588-98. 2009..081 vs. 0.850microg/L, p<0.0001) and in Mexican American women (1.081 vs. 0.70microg/L, p<0.0001)... - Exposure of the U.S. population to acrylamide in the National Health and Nutrition Examination Survey 2003-2004Hubert W Vesper
Division of Laboratory Sciences, National Center for Environmental Health, Centers for Disease Control and Prevention, Atlanta, Georgia, USA
Environ Health Perspect 118:278-83. 2010..Data on the extent of exposure to acrylamide and its primary metabolite, glycidamide, are needed to aid in the assessment of potential health effects... - Semi-volatiles in mainstream smoke delivery from select charcoal-filtered cigarette brand variantsBryan A Hearn
Emergency Response and Air Toxicants Branch, Division of Laboratory Sciences, National Center for Environmental Health, Centers for Disease Control and Prevention, 4770 Buford Highway, NE MS F 47, Atlanta, GA 30341, USA
Tob Control 19:223-30. 2010.... - Variability among five over-the-counter blood glucose monitorsMary M Kimberly
Division of Laboratory Sciences, National Center for Environmental Health, Centers for Disease Control and Prevention, Mailstop F25, 4770 Buford Hwy NE, Atlanta, GA 30341 3724, USA
Clin Chim Acta 364:292-7. 2006..To assess the need for standardization, we evaluated the variability among 5 of the most common monitors: MediSense Precision Xtra, Ascencia Dex, Prestige Smart System, OneTouch Ultra, and Accu-Chek Advantage... - Concentrations of environmental chemicals associated with neurodevelopmental effects in U.S. populationLarry L Needham
Organic Analytical Toxicology Branch, Mailstop F17, National Center for Environmental Health, Centers for Disease Control and Prevention, Atlanta, GA 30341 3724, USA
Neurotoxicology 26:531-45. 2005..S. population. These data will continue to be collected in 2-year cycles and thus allow changes in human levels to be followed... - Standardization of immunoassays for measurement of high-sensitivity C-reactive protein. Phase I: evaluation of secondary reference materialsMary M Kimberly
Division of Laboratory Sciences, National Center for Environmental Health, Centers for Disease Control and Prevention, Atlanta, GA 30341 3724, USA
Clin Chem 49:611-6. 2003..As variability among existing high-sensitivity CRP (hsCRP) assays can lead to misclassification of patients and hamper implementation of population-based medical decision points, standardization of hsCRP assays is needed... - Urinary levels of trichloroacetic acid, a disinfection by-product in chlorinated drinking water, in a human reference populationAntonia M Calafat
Division of Laboratory Sciences, National Center for Environmental Health, Centers for Disease Control and Prevention, Atlanta, Georgia 30341, USA
Environ Health Perspect 111:151-4. 2003.... - Urinary and serum concentrations of seven phytoestrogens in a human reference population subsetLiza Valentin-Blasini
National Center for Environmental Health, Centers for Disease Control and Prevention, Atlanta, GA 30341, USA
J Expo Anal Environ Epidemiol 13:276-82. 2003..Determination of phytoestrogen concentrations in large study populations will give a better insight into the actual dietary exposure to these biologically active compounds in the US population... - Serum iron and iron-binding capacity: a round-robin interlaboratory comparison studyHeidi Michels Blanck
Division of Nutrition and Physical Activity, National Center for Chronic Disease Prevention and Health Promotion, National Center for Chronic Disease Prevention and Health Promotion, CDC, Atlanta, GA 30341, USA
Clin Chem 49:1672-5. 2003 - Concentrations of dialkyl phosphate metabolites of organophosphorus pesticides in the U.S. populationDana B Barr
National Center for Environmental Health, Centers for Disease Control and Prevention, Atlanta, Georgia 30341, USA
Environ Health Perspect 112:186-200. 2004..These data will be important in evaluating the impact of organophosphorus pesticide exposure in the U.S. population and the effectiveness of regulatory actions... - Comparison of 1-hydroxypyrene exposure in the US population with that in occupational exposure studiesWenlin Huang
National Center for Environmental Health, Centers for Disease Control and Prevention, 4770 Buford Highway NE, Mailstop F 47, Atlanta, GA 30341, USA
Int Arch Occup Environ Health 77:491-8. 2004..This difference was statistically significant. In this paper, we compare the reference range of urinary 1-OHpyrene levels with levels reported from various occupations by other researchers... - Within-person, among-finger variability of capillary blood glucose measurementsMary M Kimberly
Clinical Chemistry Branch, Division of Laboratory Sciences, National Center for Environmental Health, Centers for Disease Control and Prevention, Atlanta, GA 30341, USA
Clin Chem 50:2389-91. 2004 - Biochemical indicators of B vitamin status in the US population after folic acid fortification: results from the National Health and Nutrition Examination Survey 1999-2000Christine M Pfeiffer
National Center for Environmental Health, Centers for Disease Control and Prevention, Atlanta, GA 30341, USA
Am J Clin Nutr 82:442-50. 2005..Mandatory folic acid fortification of cereal-grain products was introduced in the United States in 1998 to decrease the risk that women will have children with neural tube defects... - Evaluating current policy for detecting mosaicism in amniotic fluid cultures: implications for current cell counting practicesSamuel P Caudill
Centers for Disease Control and Prevention, Clinical Chemistry Branch, Atlanta, GA 30341 3724, USA
Stat Med 24:615-22. 2005.... - Urinary creatinine concentrations in the U.S. population: implications for urinary biologic monitoring measurementsDana B Barr
National Center for Environmental Health, Centers for Disease Control and Prevention, Atlanta, Georgia 30341, USA
Environ Health Perspect 113:192-200. 2005..This approach allows the urinary analyte concentration to be appropriately adjusted for urinary creatinine and the statistical significance of other variables in the model to be independent of effects of creatinine concentration... - Urinary concentrations of bisphenol A and 4-nonylphenol in a human reference populationAntonia M Calafat
Division of Laboratory Sciences, National Center for Environmental Health, Centers for Disease Control and Prevention, Atlanta, Georgia 30341, USA
Environ Health Perspect 113:391-5. 2005..S. population) and relatively small size, this study provides the first reference range of human internal dose levels of BPA and NP in a demographically diverse human population... - Levels in the U.S. population of those persistent organic pollutants (2003-2004) included in the Stockholm Convention or in other long range transboundary air pollution agreementsDonald G Patterson
National Center for Environmental Health, Centers for Disease Control and Prevention, 4770 Buford Highway, NE, Mailstop F 17, Atlanta, Georgia 30341, USA
Environ Sci Technol 43:1211-8. 2009..7% of persons aged 12 years and older (90th percentile: 8.3 ng/g lipid, 95% CI: <LOD-13.0 ng/g lipid). Dieldrin was detected in 87.2% of persons aged 12 years and older (95th percentile: 18.9 ng/g lipid, 95% CI: 15.8-24.5 ng/g lipid)... - Polyfluoroalkyl compounds in pooled sera from children participating in the National Health and Nutrition Examination Survey 2001-2002Kayoko Kato
Division of Laboratory Sciences, National Center for Environmental Health, Centers for Disease Control and Prevention, Atlanta, Georgia, USA
Environ Sci Technol 43:2641-7. 2009..Nevertheless,these findings suggestthat human exposure to PFCs among the population groups of children examined may differ and stress the importance of identifying the environmental sources and routes of exposure to PFCs... - Performance characteristics of a new less sensitive HIV-1 enzyme immunoassay for use in estimating HIV seroincidenceDenise Kothe
Division of Laboratory Sciences, National Center for Environmental Health, Atlanta, Georgia 30341, USA
J Acquir Immune Defic Syndr 33:625-34. 2003..The paper also reports Vironostika-LS quality control guidelines and the results from 3 rounds of proficiency testing... - Levels of methyleugenol in a subset of adults in the general U.S. population as determined by high resolution mass spectrometryD B Barr
Division of Laboratory Sciences, National Center for Environmental Health, Centers for Disease Control and Prevention, Atlanta, GA 30341, USA
Environ Health Perspect 108:323-8. 2000..S. adults to ME. Detailed pharmacokinetic studies are required to determine the relationship between ME intake and human serum ME concentrations... - Urinary albumin excretion in children: factors related to elevated excretion in the United States populationP W Mueller
Centers for Disease Control and Prevention CDC, National Center for Environmental Health, Division of Environmental Health Laboratory Sciences, Atlanta, Georgia 30341 3724, USA
Ren Fail 21:293-302. 1999..The increased prevalence of high albumin excretion is probably associated with normal development in children, but an increased susceptibility to chronic diseases in the future among the children with high excretion cannot be ruled out... - Phthalate monoesters levels in the urine of young childrenJ W Brock
Division of Laboratory Sciences, National Center for Environmental Health (NCEH, Centers for Disease Control and Prevention (CDC, Atlanta, GA 30341, USA
Bull Environ Contam Toxicol 68:309-14. 2002 - Multiple hypothesis tests in multiple investigationsS P Caudill
Division of Environmental Health Laboratory Sciences, Centers for Disease Control and Prevention, Atlanta, Georgia 30333, USA
Stat Med 14:585-9. 1995..The method is illustrated by using high performance liquid chromatography to identify potential aetiologic contaminants in L-tryptophan samples... - Trends in the exposure of nonsmokers in the U.S. population to secondhand smoke: 1988-2002James L Pirkle
Division of Laboratory Science, National Center for Environmental Health, Centers for Disease Control and Prevention, Atlanta, Georgia 30341, USA
Environ Health Perspect 114:853-8. 2006..Our findings suggest that recent public health efforts to reduce such exposures have had an important effect, although children and non-Hispanic black nonsmokers show relatively higher levels of serum cotinine... - An in-depth examination of the excretion of albumin and other sensitive markers of renal damage in mild hypertensionP W Mueller
Division of Environmental Health Laboratory Sciences, Centers for Disease Control and Prevention, Atlanta, GA 30341-3724, USA
Am J Hypertens 8:1072-82. 1995..02). Retinol-binding protein values, however, were within the normal range, indicating that the elevated albumin values were the result of changes in selectivity of the glomerulus... - Pharmacokinetics of 2,3,7,8-tetrachlorodibenzo-p-dioxin in Seveso adults and veterans of operation Ranch HandJoel E Michalek
Air Force Research Laboratory, Brooks Air Force Base, San Antonio, Texas 78235 5250, USA
J Expo Anal Environ Epidemiol 12:44-53. 2002..27 years followed by a slower rate after 3 years is consistent with the expected pattern in a two-compartment open model, with a distribution phase of rapid elimination followed by a slower elimination phase... - Methodological aspects of a national population-based study of persistent organochlorine compounds in serumMichael N Bates
Institute of Environmental Science and Research Ltd, P O Box 50 348, Porirua, New Zealand
Chemosphere 58:943-51. 2005..Second, pooling of samples to reduce analytic expenses. It is hoped that the methods used in this study will form the basis for other studies investigating organochlorine concentrations in national populations... - Standardization of insulin immunoassays: report of the American Diabetes Association WorkgroupSantica Marcovina
Northwest Lipid Metabolism and Diabetes Research Laboratory, University of Washington, Seattle, WA, USA
Clin Chem 53:711-6. 2007..Currently, lack of standardization of insulin assays hinders efforts to achieve consistent measures for treatment guidelines...