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National Cancer Institute U.S. National Institutes of Health www.cancer.gov
About DCEG

Jun-mo Nam, M.S.

Math Statistician

Location: Executive Plaza South, Room 8028
Phone: 301-496-3232
Fax: 301-402-0081
E-mail: JN26R@nih.gov

  

Biography

Mr. Nam received a M.S. in mathematical statistics from the University of Washington in 1966. He served as a research associate at School of Medicine, University of Washington. In 1969, he joined the NCI as a mathematical statistician. He is a recipient of U.S. Public Health Service Special Achievement Award, 1979, and a Sustained Superior Performance award, 1999.

Research Interests

Statistical Methods;
1) Interval estimation of a difference between two marginal probabilities in matched samples. 2) Statistical methods for assessing a reliability of ratings using kappa agreement in multiple studies. 3) Simultaneous testing both the sensitivity and the specificity in a diagnostic study. 4) Establishing equivalence of two treatments in survival with censoring and sample size determination.

Collaborations;
HLA allele distributions by major races in U.S. based on molecular typing. Maternal hormone levels and cryptochism in sons. Individual worker's exposure level related to an area exposure measurement.

Keywords

Equivalence test, HLA allele frequency, kappa agreement, matched samples, sensitivity test, sample size determination.

Selected Publications

  • Nam J, Blackwelder WC. "Analysis of the ratio of marginal probabilities in a matched- pairs setting." Stat Med 2002;21:689-700.
  • Nam J. "Testing the intraclass version of kappa coefficient of agreement with binary scale and sample size determination." Biometrical Journal 2002;44:558-570.
  • Sauntharerejah Y, Nakamura R, Nam J, Robyn J, Loberiza F, Maciejewski JP, Simonis T, Molldrem J, Young NS, Barrett AJ. "HLA DR15(DR2) is over-represented in myelodysplastic Syndrome and aplastic anemia, and predicts a response to immunosuppression in myelodysplastic syndrome." Blood 2002; 100:1570-1574.
  • Nam J. "Inference on intraclass version of kappa agreement." Proc. US Korea Conference- 2002, Statistics. The Korean Federation of Science and Technology Societies, Seoul: WCSE/UKC 2003; 1172:1-5.
  • Nam J. "Homogeneity score test for the intraclass version of the Kappa statistics and sample size determination in multiple or stratified studies." Biometrics 2003; 59:1027-1035.
  • Nam J, Kim J, Lee S. "Equivalence of two treatments and sample size determination under an exponential survival model with censoring. " Computational Statistics and Data Analysis 2005; 49:217-226.
  • Nam J, Rice C, Gail M. "Comparison of asbestos exposure assessments by next-of-kin, by an occupational hygienist, and by a job-exposure matrix from the National Occupational Hazard Survey." Am J of Indust Med 2005; 47:443-450.
  • McGlynn KA, Graubard B, Nam J, Stancyzk FZ, Longnecker MP, Klebanoff MA. "Maternal hormone levels and risk of cryptorchism among populations at high and low risk of testicular germ cell tumors." Cancer Epi, Bio & Prev 2005; 14:1732-1737.
  • Nam J. "Assessment of homogeneity tests for Kappa statistics under equal prevalence across studies in reliability." Stat in Med 2006; 25:1521-1531.
  • Nam J. "Non-inferiority of new procedure to standard procedure in stratified matched-pair designs." Bimetrical J 2006; 966-977.
  • Nam J. "Comparison of validity of assessment methods using indices of adjusted agreement." Stat in Med 2007; 26:620-632.
  • Nam J. "Comments on confidence interval for a ratio of binomial proportions based on paired data." Stat in Med 2008; 27:3209-3210.