Tatsuki Koyama

Summary

Affiliation: Vanderbilt University
Country: USA

Publications

  1. ncbi request reprint A framework for two-stage adaptive procedures to simultaneously test non-inferiority and superiority
    Tatsuki Koyama
    Department of Biostatistics, Vanderbilt University School of Medicine, Nashville, TN 37232 6848, USA
    Stat Med 24:2439-56. 2005
  2. ncbi request reprint Decision-theoretic views on simultaneous testing of superiority and noninferiority
    Tatsuki Koyama
    Department of Biostatistics, Vanderbilt University School of Medicine, Nashville, Tennessee 37232 6848, USA
    J Biopharm Stat 15:943-55. 2005
  3. ncbi request reprint Flexible design of two-stage adaptive procedures for phase III clinical trials
    Tatsuki Koyama
    Department of Biostatistics, Vanderbilt University School of Medicine, Nashville, Tennessee 37232 6848, USA
    Contemp Clin Trials 28:500-13. 2007
  4. ncbi request reprint Proper inference from Simon's two-stage designs
    Tatsuki Koyama
    Department of Biostatistics, Vanderbilt University School of Medicine, 571 Preston Building, Nashville, TN 37232 6848, USA
    Stat Med 27:3145-54. 2008
  5. pmc Accuracy and reproducibility of a multiplex immunoassay platform: a validation study
    Julie A Bastarache
    Division of Allergy, Pulmonary and Critical Care Medicine, Department of Medicine, Vanderbilt University School of Medicine, United States
    J Immunol Methods 367:33-9. 2011
  6. pmc Acute lung injury in patients with traumatic injuries: utility of a panel of biomarkers for diagnosis and pathogenesis
    Richard D Fremont
    Division of Allergy, Department of Medicine, Vanderbilt University School of Medicine, Nashville, Tennessee 37232 2650, USA
    J Trauma 68:1121-7. 2010
  7. pmc Prognostic and pathogenetic value of combining clinical and biochemical indices in patients with acute lung injury
    Lorraine B Ware
    DivisionAllergy, Pulmonary, and Critical Care Medicine, Department of Medicine, Vanderbilt University School of Medicine, Nashville, TN 37232 2650, USA
    Chest 137:288-96. 2010
  8. pmc Endoscopic ultrasound to guide the combined medical and surgical management of pediatric perianal Crohn's disease
    Michael J Rosen
    Division of Pediatric Gastroenterology, Hepatology, and Nutrition, Vanderbilt University School of Medicine, Nashville, TN 37232 0696, USA
    Inflamm Bowel Dis 16:461-8. 2010
  9. pmc Ontogeny of FOXP3(+) regulatory T cells in the postnatal human small intestinal and large intestinal lamina propria
    Jörn Hendrik Weitkamp
    Department of Pediatrics, Division of Neonatology, Monroe Carell Jr Children s Hospital at Vanderbilt, 2215 B Garland Avenue, 1125 MRB IV Light Hall, Nashville, TN 37232 0656, USA
    Pediatr Dev Pathol 12:443-9. 2009
  10. pmc Use of fluoroscopy to study in vivo motility in mouse pups
    Kent Williams
    Department of Pediatrics, Baylor College of Medicine, Houston, TX, USA
    J Pediatr Gastroenterol Nutr 52:679-85. 2011

Collaborators

Detail Information

Publications17

  1. ncbi request reprint A framework for two-stage adaptive procedures to simultaneously test non-inferiority and superiority
    Tatsuki Koyama
    Department of Biostatistics, Vanderbilt University School of Medicine, Nashville, TN 37232 6848, USA
    Stat Med 24:2439-56. 2005
    ..Based on the results at the end of stage I, the primary objective for stage II is chosen, and sample sizes and critical values for stage II are determined...
  2. ncbi request reprint Decision-theoretic views on simultaneous testing of superiority and noninferiority
    Tatsuki Koyama
    Department of Biostatistics, Vanderbilt University School of Medicine, Nashville, Tennessee 37232 6848, USA
    J Biopharm Stat 15:943-55. 2005
    ..We find that the simultaneous testing procedure generally provides smaller loss than Ng's method, except when the prior distribution allocates a large probability to equivalence of the two treatments...
  3. ncbi request reprint Flexible design of two-stage adaptive procedures for phase III clinical trials
    Tatsuki Koyama
    Department of Biostatistics, Vanderbilt University School of Medicine, Nashville, Tennessee 37232 6848, USA
    Contemp Clin Trials 28:500-13. 2007
    ..Furthermore, we show how to compute the P value, confidence interval and a reasonable point estimate for any design that can be placed under the proposed framework...
  4. ncbi request reprint Proper inference from Simon's two-stage designs
    Tatsuki Koyama
    Department of Biostatistics, Vanderbilt University School of Medicine, 571 Preston Building, Nashville, TN 37232 6848, USA
    Stat Med 27:3145-54. 2008
    ..The conventional inference, however, may contradict the result of the corresponding hypothesis testing...
  5. pmc Accuracy and reproducibility of a multiplex immunoassay platform: a validation study
    Julie A Bastarache
    Division of Allergy, Pulmonary and Critical Care Medicine, Department of Medicine, Vanderbilt University School of Medicine, United States
    J Immunol Methods 367:33-9. 2011
    ..We sought to validate a specific multiplex cytokine immunoassay (Human 9-plex cytokine array on the Searchlight® platform by Thermoscientific) prior to use in a large clinical study...
  6. pmc Acute lung injury in patients with traumatic injuries: utility of a panel of biomarkers for diagnosis and pathogenesis
    Richard D Fremont
    Division of Allergy, Department of Medicine, Vanderbilt University School of Medicine, Nashville, Tennessee 37232 2650, USA
    J Trauma 68:1121-7. 2010
    ..The aims of this study were to develop a panel of plasma biomarkers to facilitate diagnosis of trauma-induced ALI and to enhance our understanding of the pathogenesis of human ALI...
  7. pmc Prognostic and pathogenetic value of combining clinical and biochemical indices in patients with acute lung injury
    Lorraine B Ware
    DivisionAllergy, Pulmonary, and Critical Care Medicine, Department of Medicine, Vanderbilt University School of Medicine, Nashville, TN 37232 2650, USA
    Chest 137:288-96. 2010
    ..We hypothesized that a combination of biologic and clinical markers would be superior to either biomarkers or clinical factors alone in predicting ALI/ARDS mortality and would provide insight into the pathogenesis of clinical ALI/ARDS...
  8. pmc Endoscopic ultrasound to guide the combined medical and surgical management of pediatric perianal Crohn's disease
    Michael J Rosen
    Division of Pediatric Gastroenterology, Hepatology, and Nutrition, Vanderbilt University School of Medicine, Nashville, TN 37232 0696, USA
    Inflamm Bowel Dis 16:461-8. 2010
    ....
  9. pmc Ontogeny of FOXP3(+) regulatory T cells in the postnatal human small intestinal and large intestinal lamina propria
    Jörn Hendrik Weitkamp
    Department of Pediatrics, Division of Neonatology, Monroe Carell Jr Children s Hospital at Vanderbilt, 2215 B Garland Avenue, 1125 MRB IV Light Hall, Nashville, TN 37232 0656, USA
    Pediatr Dev Pathol 12:443-9. 2009
    ..The frequency of FOXP3(+) cells and the ratios of FOXP3(+) to CD4(+) or CD8(+) cells do not change with increasing intrauterine development or postnatal age...
  10. pmc Use of fluoroscopy to study in vivo motility in mouse pups
    Kent Williams
    Department of Pediatrics, Baylor College of Medicine, Houston, TX, USA
    J Pediatr Gastroenterol Nutr 52:679-85. 2011
    ..This study sought to determine whether digital fluoroscopy could be used to evaluate gastrointestinal motility in mouse pups as well as adult mice...
  11. doi request reprint Racial and ethnic differences in pediatric obesity-prevention counseling: national prevalence of clinician practices
    Christopher M Branner
    Department of Pediatric Gastroenterology, Vanderbilt University, Nashville, TN, USA
    Obesity (Silver Spring) 16:690-4. 2008
    ..To assess the frequency of clinician-reported delivery of obesity-prevention counseling (OPC) at well-child visits; evaluating for racial/ethnic discrepancies...
  12. ncbi request reprint Calcaneal ultrasound bone densitometry is not a useful tool to screen patients with inflammatory bowel disease at high risk for metabolic bone disease
    David A Schwartz
    Inflammatory Bowel Disease Center, Vanderbilt University Medical Center, Nashville, Tennessee 37232, USA
    Inflamm Bowel Dis 11:749-54. 2005
    ..This would reduce the number of patients undergoing DXA testing unnecessarily. We tried to determine if calcaneal ultrasound bone densitometry is a useful tool in screening high-risk patients with IBD for metabolic bone disease...
  13. pmc Body mass index and blood pressure changes over the course of treatment of pediatric acute lymphoblastic leukemia
    Adam J Esbenshade
    Department of Pediatrics, Vanderbilt University School of Medicine and Monroe Carell Jr Children s Hospital at Vanderbilt, Nashville, Tennessee 37232, USA
    Pediatr Blood Cancer 56:372-8. 2011
    ..Obesity and hypertension are reported among survivors of pediatric acute lymphoblastic leukemia (ALL). However, little is known about the trajectory of body mass index (BMI) and blood pressure over the course of ALL therapy...
  14. doi request reprint Impact of conditioning regimen in allogeneic hematopoetic stem cell transplantation for children with acute myelogenous leukemia beyond first complete remission: a pediatric blood and marrow transplant consortium (PBMTC) study
    India Y Sisler
    Vanderbilt University Medical Center, Nashville, Tennessee, USA
    Biol Blood Marrow Transplant 15:1620-7. 2009
    ..Our study provides no evidence of an advantage to using TBI in children with AML beyond CR1. A prospective, randomized study is needed to confirm these results...
  15. pmc Raf protects against colitis by promoting mouse colon epithelial cell survival through NF-kappaB
    Karen L Edelblum
    Department of Cell and Developmental Biology, Vanderbilt University, Nashville, Tennessee, USA
    Gastroenterology 135:539-51. 2008
    ..This study addresses the role of Raf in epithelial cell survival in response to dextran sulfate sodium (DSS)-induced injury and inflammation...
  16. ncbi request reprint Open-label pilot study of combination therapy with rosiglitazone and bexarotene in the treatment of cutaneous T-cell lymphoma
    Jacob A Sepmeyer
    Vanderbilt University School of Medicine, Vanderbilt University Medical Center, Nashville, TN 37232 5227, USA
    J Am Acad Dermatol 56:584-7. 2007
    ..After 16 weeks of combination therapy, skin score decreased in two patients. Pruritus was alleviated in 3 of 4 patients, whereas quality of life was unchanged. Adverse events included hyperlipidemia, anemia, neutropenia, and lymphopenia...
  17. pmc Chemokine markers predict biochemical recurrence of prostate cancer following prostatectomy
    David L Blum
    Department of Urologic Surgery, Vanderbilt Ingram Cancer Center, Vanderbilt University, Nashville, Tennessee 37232, USA
    Clin Cancer Res 14:7790-7. 2008
    ..Inflammation has emerged as a mediator of prostate cancer metastatic progression. We hypothesized that chemokines can be biomarkers for distinguishing patients with high risk for biochemical recurrence of prostate cancer...