Ram B Jain

Summary

Affiliation: Centers for Disease Control and Prevention
Country: USA

Publications

  1. doi A recursive version of Grubbs' test for detecting multiple outliers in environmental and chemical data
    Ram B Jain
    Centers for Disease Control and Prevention, 4770 Buford Highway, Chamblee, GA 30341, USA
    Clin Biochem 43:1030-3. 2010
  2. doi Evaluation of maximum likelihood procedures to estimate left censored observations
    Ram B Jain
    Centers for Disease Control and Prevention, 4770 Buford Highway, Chamblee, GA 30329, USA
    Anal Chem 80:1124-32. 2008
  3. doi A simple methodology to analyze inter-laboratory data: a simulation study
    Ram B Jain
    Division of Laboratory Statistics, National Center for Environmental Health, Centers for Disease Control and Prevention, Mail Stop F 47, Atlanta, GA 30341, United States
    Clin Chim Acta 410:79-84. 2009
  4. doi Regression models to predict corrected weight, height and obesity prevalence from self-reported data: data from BRFSS 1999-2007
    R B Jain
    National Center for Environmental Health, Centers for Disease Control and Prevention, Atlanta, GA 30341, USA
    Int J Obes (Lond) 34:1655-64. 2010
  5. doi Comparison of three weighting schemes in weighted regression analysis for use in a chemistry laboratory
    Ram B Jain
    Division of Laboratory Sciences, National Center for Environmental Health, Centers for Disease Control and Prevention, Chamblee, GA 30341, USA
    Clin Chim Acta 411:270-9. 2010
  6. ncbi Effect of body mass index and total blood volume on serum cotinine levels among cigarette smokers: NHANES 1999-2008
    Ram B Jain
    Division of Laboratory Sciences, National Center for Environmental Health, Centers for Disease Control and Prevention, United States
    Clin Chim Acta 411:1063-8. 2010
  7. doi Regression models to estimate total polychlorinated biphenyls in the general US population: 2001-2002 and 2003-2004
    Ram B Jain
    Centers for Disease Control and Prevention, Chamblee, GA 30329, United States
    Chemosphere 79:243-52. 2010
  8. doi Tobacco-specific nitrosamine 4-(methylnitrosamino)-1-(3-pyridyl)-1-butanol (NNAL) in smokers in the United States: NHANES 2007-2008
    Yang Xia
    Division of Laboratory Science, National Center for Environmental Health, Centers for Disease Control and Prevention, Atlanta, Georgia 30341, USA
    Biomarkers 16:112-9. 2011
  9. doi Urine concentrations of a tobacco-specific nitrosamine carcinogen in the U.S. population from secondhand smoke exposure
    John T Bernert
    Division of Laboratory Sciences, National Center for Environmental Health, Centers for Disease Control and Prevention, Atlanta, Georgia 30341, USA
    Cancer Epidemiol Biomarkers Prev 19:2969-77. 2010
  10. ncbi Levels of tobacco-specific nitrosamines and polycyclic aromatic hydrocarbons in mainstream smoke from different tobacco varieties
    Yan S Ding
    Emergency Response and Air Toxicants Branch, Division of Laboratory Science, National Center for Environmental Health, Centers for Disease Control and Prevention, 4770 Buford Highway Northeast, Mailstop F 47, Atlanta, GA 30341 3724, USA
    Cancer Epidemiol Biomarkers Prev 17:3366-71. 2008

Detail Information

Publications25

  1. doi A recursive version of Grubbs' test for detecting multiple outliers in environmental and chemical data
    Ram B Jain
    Centers for Disease Control and Prevention, 4770 Buford Highway, Chamblee, GA 30341, USA
    Clin Biochem 43:1030-3. 2010
    ..To compare the performance of Grubbs' outlier detection procedure with recursive Extreme Studentized Deviate (ESD) outlier detection procedure...
  2. doi Evaluation of maximum likelihood procedures to estimate left censored observations
    Ram 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%...
  3. doi A simple methodology to analyze inter-laboratory data: a simulation study
    Ram B Jain
    Division of Laboratory Statistics, National Center for Environmental Health, Centers for Disease Control and Prevention, Mail Stop F 47, Atlanta, GA 30341, United States
    Clin Chim Acta 410:79-84. 2009
    ..In this work a 3-step methodology is proposed to analyze inter-laboratory experiments...
  4. doi Regression models to predict corrected weight, height and obesity prevalence from self-reported data: data from BRFSS 1999-2007
    R B Jain
    National Center for Environmental Health, Centers for Disease Control and Prevention, Atlanta, GA 30341, USA
    Int J Obes (Lond) 34:1655-64. 2010
    ....
  5. doi Comparison of three weighting schemes in weighted regression analysis for use in a chemistry laboratory
    Ram B Jain
    Division of Laboratory Sciences, National Center for Environmental Health, Centers for Disease Control and Prevention, Chamblee, GA 30341, USA
    Clin Chim Acta 411:270-9. 2010
    ..To minimize the effect of heteroscedasticity in chemical and other data, weighted regression analysis is the preferred regression technique. In this work a regression weight that maximizes accuracy and precision was sought...
  6. ncbi Effect of body mass index and total blood volume on serum cotinine levels among cigarette smokers: NHANES 1999-2008
    Ram B Jain
    Division of Laboratory Sciences, National Center for Environmental Health, Centers for Disease Control and Prevention, United States
    Clin Chim Acta 411:1063-8. 2010
    ..Body mass index (BMI) and total blood volume are not always considered as variables that affect serum cotinine concentrations...
  7. doi Regression models to estimate total polychlorinated biphenyls in the general US population: 2001-2002 and 2003-2004
    Ram B Jain
    Centers for Disease Control and Prevention, Chamblee, GA 30329, United States
    Chemosphere 79:243-52. 2010
    ..The R(2) for both NHANES 2003-2004 models was >81%. Thus, the estimate of SigmaPCB for the general US population can be improved by considering common demographic variables, such as race/ethnicity, and selected congeners...
  8. doi Tobacco-specific nitrosamine 4-(methylnitrosamino)-1-(3-pyridyl)-1-butanol (NNAL) in smokers in the United States: NHANES 2007-2008
    Yang Xia
    Division of Laboratory Science, National Center for Environmental Health, Centers for Disease Control and Prevention, Atlanta, Georgia 30341, USA
    Biomarkers 16:112-9. 2011
    ..001). In addition to addressing current NNK exposure levels, these results will form a baseline for future estimates of tobacco users' exposure to this carcinogen...
  9. doi Urine concentrations of a tobacco-specific nitrosamine carcinogen in the U.S. population from secondhand smoke exposure
    John T Bernert
    Division of Laboratory Sciences, National Center for Environmental Health, Centers for Disease Control and Prevention, Atlanta, Georgia 30341, USA
    Cancer Epidemiol Biomarkers Prev 19:2969-77. 2010
    ..We have measured total NNAL in the U.S. population of tobacco users and nonsmokers exposed to secondhand smoke...
  10. ncbi Levels of tobacco-specific nitrosamines and polycyclic aromatic hydrocarbons in mainstream smoke from different tobacco varieties
    Yan S Ding
    Emergency Response and Air Toxicants Branch, Division of Laboratory Science, National Center for Environmental Health, Centers for Disease Control and Prevention, 4770 Buford Highway Northeast, Mailstop F 47, Atlanta, GA 30341 3724, USA
    Cancer Epidemiol Biomarkers Prev 17:3366-71. 2008
    ..The influence of nitrate on mainstream smoke NNK and PAH levels were of different magnitude and direction. Our results tend to indicate an inverse relation exists between NNK and PAH deliveries when considering different tobacco blends...
  11. ncbi Effect of differing levels of tobacco-specific nitrosamines in cigarette smoke on the levels of biomarkers in smokers
    David L Ashley
    Division of Laboratory Sciences, National Center for Environmental Health, Centers for Disease Control and Prevention, Atlanta, Georgia 30341, USA
    Cancer Epidemiol Biomarkers Prev 19:1389-98. 2010
    ..Previous studies have shown significant global differences in the levels of TSNAs in cigarette smoke because of the variation in tobacco blending and curing practices around the world...
  12. doi Association of caffeine consumption and smoking status with the serum concentrations of polychlorinated biphenyls, dioxins, and furans in the general U.S. population: NHANES 2003-2004
    Ram B Jain
    Division of Laboratory Sciences, National Center for Environmental Health, Centers for Disease Control and Prevention, Atlanta, Georgia 30341, USA
    J Toxicol Environ Health A 74:1225-39. 2011
    ..Smoking and caffeine consumption need to be considered in the interpretation of human biomonitoring data because they appear to affect the serum concentrations of these chemicals...
  13. doi Increases in tobacco exposure biomarkers measured in non-smokers exposed to sidestream cigarette smoke under controlled conditions
    John T Bernert
    Division of Laboratory Science, National Center for Environmental Health, Centers for Disease Control and Prevention, Atlanta, Georgia 30341, USA
    Biomarkers 14:82-93. 2009
    ....
  14. ncbi Limitations of maximum likelihood estimation procedures when a majority of the observations are below the limit of detection
    Ram B Jain
    Centers for Disease Control and Prevention, Mail Stop F 47, 4770 Buford Highway, Atlanta, Georgia 30341, USA
    Anal Chem 80:4767-72. 2008
    ..A maximum likelihood procedure without imputation should be preferred when N < 100 and P >or= 70%. However, it should be the expected that biases for both mean and SD in these circumstances may be unacceptably high...
  15. doi Iodine status of the U.S. population, National Health and Nutrition Examination Survey 2003-2004
    Kathleen L Caldwell
    Division of Laboratory Sciences, National Center for Environmental Health, Centers for Disease Control and Prevention, Atlanta, Georgia 30341, USA
    Thyroid 18:1207-14. 2008
    ..It is the third assessment of the U.S. population since NHANES III (1988-1994), when the median UI level was observed to decrease from NHANES I (1971-1974)...
  16. doi Effects of delayed sample processing and freezing on serum concentrations of selected nutritional indicators
    Bakary S Drammeh
    National Center for Environmental Health, Centers for Disease Control and Prevention, Atlanta, GA 30341, USA
    Clin Chem 54:1883-91. 2008
    ..We used samples from US volunteers to investigate the effects of delayed whole blood (WB) processing and delayed freezing of serum on selected nutritional indicators...
  17. ncbi Urinary tobacco-specific nitrosamines and 4-aminobiphenyl hemoglobin adducts measured in smokers of either regular or light cigarettes
    John T Bernert
    Division of Laboratory Science, National Center for Environmental Health, Centers for Disease Control and Prevention, Atlanta, GA 30341, USA
    Nicotine Tob Res 7:729-38. 2005
    ..Thus the concentrations of the carcinogen biomarkers NNAL and 4-ABP in the smokers who regularly smoked light cigarettes were essentially the same as those in the smokers who chose regular cigarettes...
  18. pmc Serum concentrations of selected persistent organic pollutants in a sample of pregnant females and changes in their concentrations during gestation
    Richard Y Wang
    National Center for Environmental Health, Centers for Disease Control and Prevention, Atlanta, Georgia 30341, USA
    Environ Health Perspect 117:1244-9. 2009
    ....
  19. ncbi Influence of 5,10-methylenetetrahydrofolate reductase polymorphism on whole-blood folate concentrations measured by LC-MS/MS, microbiologic assay, and bio-rad radioassay
    Zia Fazili
    Division of Laboratory Sciences, National Center for Environmental Health, Centers for Disease Control and Prevention, 4770 Buford Highway NE, Atlanta, GA 30345, USA
    Clin Chem 54:197-201. 2008
    ....
  20. ncbi Determination of carcinogenic tobacco-specific nitrosamines in mainstream smoke from U.S.-brand and non-U.S.-brand cigarettes from 14 countries
    Weijia Wu
    Division of Laboratory Sciences, National Center for Environmental Health, Centers for Disease Control and Prevention, Atlanta, GA 30341, USA
    Nicotine Tob Res 7:443-51. 2005
    ....
  21. ncbi Trends in blood folate and vitamin B-12 concentrations in the United States, 1988 2004
    Christine M Pfeiffer
    National Center for Environmental Health, Centers for Disease Control and Prevention, Atlanta, GA 30341, USA
    Am J Clin Nutr 86:718-27. 2007
    ..Monitoring the folate status of US population groups over time has been a public health priority for the past 2 decades, and the focus has been enhanced since the implementation of a folic acid fortification program in the mid-1990s...
  22. ncbi Determination of 14 polycyclic aromatic hydrocarbons in mainstream smoke from U.S. brand and non-U.S. brand cigarettes
    Yan S Ding
    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, Mailstop F 47, Atlanta, Georgia 30341, USA
    Environ Sci Technol 40:1133-8. 2006
    ..The findings suggest that tobacco blend and nitrate levels may influence PAH deliveries, but other factors may confound this relation...
  23. doi Perchlorate, nitrate, and iodide intake through tap water
    Benjamin C Blount
    Division of Laboratory Sciences, National Center for Environmental Health, Centers for Disease Control and Prevention, 4770 Buford Highway, Atlanta, Georgia 30341, United States
    Environ Sci Technol 44:9564-70. 2010
    ..adults. This perchlorate exposure dose from tap water is relatively small compared to the total perchlorate exposure dose previously characterized for the U.S. adults (median 64 ng/kg-day) and the U.S. EPA reference dose (700 ng/kg-day)...
  24. ncbi Clinical vitamin B6 analysis: an interlaboratory comparison of pyridoxal 5'-phosphate measurements in serum
    Michael E Rybak
    Inorganic Toxicology and Nutrition Branch, Division of Laboratory Sciences, National Center for Environmental Health, Centers for Disease Control and Prevention, Atlanta, GA 30341, USA
    Clin Chem 51:1223-31. 2005
    ..Because a true reference method and certified reference materials are lacking, little is known about the relative analytical performance of clinical vitamin B(6) assays...
  25. doi The CDC VITAL-EQA program, external quality assurance for serum retinol, 2003-2006
    Bridgette M H Haynes
    Battelle, Atlanta, GA 30341, United States U S Centers for Disease Control and Prevention, Atlanta, GA 30341, United States
    Clin Chim Acta 390:90-6. 2008
    ....