Chul Ahn

Summary

Affiliation: Texas Medical Center
Country: USA

Publications

  1. ncbi request reprint Application of an adjusted chi2 statistic to site-specific data in observational dental studies
    Chul Ahn
    Clinical Epidemiology, University of Texas Medical School, Houston, Texas 77030, USA
    J Clin Periodontol 29:79-82. 2002
  2. ncbi request reprint Effect of dropouts on sample size estimates for test on trends across repeated measurements
    Chul Ahn
    Department of Internal Medicine, University of Texas Medical School, Houston, Texas 77030, USA
    J Biopharm Stat 15:33-41. 2005
  3. pmc Informed consent for cancer screening with prostate-specific antigen: how well are men getting the message?
    Evelyn C Y Chan
    Division of General Internal Medicine, University of Texas Houston Medical School, 6431 Fannin Street, 1 122 MSB, Houston, TX 77030, USA
    Am J Public Health 93:779-85. 2003
  4. pmc Physician perspectives on the importance of facts men ought to know about prostate-specific antigen testing
    Evelyn C Y Chan
    Division of General Internal Medicine ECYC, FTO, CA, The University of Texas Houston Medical School, Houston, TX, USA
    J Gen Intern Med 18:350-6. 2003
  5. ncbi request reprint Interaction between soluble thrombomodulin and intercellular adhesion molecule-1 in predicting risk of coronary heart disease
    Kenneth K Wu
    Vascular Biology Research Center and Department of Internal Medicine, University of Texas Houston Health Science Center, Houston, Tex, USA
    Circulation 107:1729-32. 2003
  6. ncbi request reprint Association of novel polymorphisms with the expression of SPARC in normal fibroblasts and with susceptibility to scleroderma
    Xiaodong Zhou
    Division of Rheumatology and Clinical Immunogenetics, University of Texas Houston Medical School, 6431 Fannin, MSB 5 270, Houston, TX 77030, USA
    Arthritis Rheum 46:2990-9. 2002
  7. pmc Do men know that they have had a prostate-specific antigen test? Accuracy of self-reports of testing at 2 sites
    Evelyn C Y Chan
    Biomedical Ethics, Division of General Internal Medicine, University of Texas Houston Medical School, 6431 Fannin, 1 122 MSB, Houston, TX 77030, USA
    Am J Public Health 94:1336-8. 2004
  8. pmc Brief report: physicians and their personal prostate cancer-screening practices with prostate-specific antigen. A national survey
    Evelyn C Y Chan
    Division of General Internal Medicine, Department of Medicine, The University of Texas Houston Medical School, Houston, TX 77030, USA
    J Gen Intern Med 21:257-9. 2006
  9. pmc Assessment of coronary heart disease risk by combined analysis of coagulation factors
    Nena Aleksic
    Department of Internal Medicine at Medical School, Vascular Biology Research Center at Brown Foundation Institute of Molecular Medicine, University of Texas Health Science Center at Houston, TX 77030, USA
    Atherosclerosis 198:294-300. 2008
  10. doi request reprint Reduced-dose fibrinolytic acceleration of ST-segment elevation myocardial infarction treatment coupled with urgent percutaneous coronary intervention compared to primary percutaneous coronary intervention alone results of the AMICO (Alliance for Myocardia
    Ali E Denktas
    University of Texas Medical School and Memorial Hermann Heart and Vascular Institute, Houston, USA
    JACC Cardiovasc Interv 1:504-10. 2008

Collaborators

Detail Information

Publications38

  1. ncbi request reprint Application of an adjusted chi2 statistic to site-specific data in observational dental studies
    Chul Ahn
    Clinical Epidemiology, University of Texas Medical School, Houston, Texas 77030, USA
    J Clin Periodontol 29:79-82. 2002
    ..However, the required assumptions for this statistic have not yet been thoroughly addressed. These assumptions are guaranteed to hold in experimental comparisons, but may be violated in some observational studies...
  2. ncbi request reprint Effect of dropouts on sample size estimates for test on trends across repeated measurements
    Chul Ahn
    Department of Internal Medicine, University of Texas Medical School, Houston, Texas 77030, USA
    J Biopharm Stat 15:33-41. 2005
    ..Stat. Med. 22: 1305-1315] with that suggested by Patel and Rowe [Patel, H., Rowe, E. (1999). Sample size for comparing linear growth curves. J. Biopharm. Stat. 9:339-350] through a simulation study...
  3. pmc Informed consent for cancer screening with prostate-specific antigen: how well are men getting the message?
    Evelyn C Y Chan
    Division of General Internal Medicine, University of Texas Houston Medical School, 6431 Fannin Street, 1 122 MSB, Houston, TX 77030, USA
    Am J Public Health 93:779-85. 2003
    ..Because PSA screening for prostate cancer is controversial, professional organizations recommend informed consent for screening...
  4. pmc Physician perspectives on the importance of facts men ought to know about prostate-specific antigen testing
    Evelyn C Y Chan
    Division of General Internal Medicine ECYC, FTO, CA, The University of Texas Houston Medical School, Houston, TX, USA
    J Gen Intern Med 18:350-6. 2003
    ..To determine physicians' rating of the importance of key facts men ought to know about prostate-specific antigen (PSA) screening and whether there are differences by specialty...
  5. ncbi request reprint Interaction between soluble thrombomodulin and intercellular adhesion molecule-1 in predicting risk of coronary heart disease
    Kenneth K Wu
    Vascular Biology Research Center and Department of Internal Medicine, University of Texas Houston Health Science Center, Houston, Tex, USA
    Circulation 107:1729-32. 2003
    ..A high sICAM level increases the risk of CHD, whereas a high level of sTM has a lower risk of CHD. It was unclear whether there was an interaction between sTM and sICAM...
  6. ncbi request reprint Association of novel polymorphisms with the expression of SPARC in normal fibroblasts and with susceptibility to scleroderma
    Xiaodong Zhou
    Division of Rheumatology and Clinical Immunogenetics, University of Texas Houston Medical School, 6431 Fannin, MSB 5 270, Houston, TX 77030, USA
    Arthritis Rheum 46:2990-9. 2002
    ..SPARC (secreted protein, acidic and rich in cysteine) regulates the deposition or assembly of ECM components. The aim of this study was to investigate the role of SPARC in SSc susceptibility by functional and genetic association studies...
  7. pmc Do men know that they have had a prostate-specific antigen test? Accuracy of self-reports of testing at 2 sites
    Evelyn C Y Chan
    Biomedical Ethics, Division of General Internal Medicine, University of Texas Houston Medical School, 6431 Fannin, 1 122 MSB, Houston, TX 77030, USA
    Am J Public Health 94:1336-8. 2004
    ..Concordance, sensitivity, and false-negative values were 65%, 67%, and 33%, respectively, at 1 clinic site and 88%, 64%, and 36% at the other. The accuracy of self-reports of PSA testing should be interpreted with caution...
  8. pmc Brief report: physicians and their personal prostate cancer-screening practices with prostate-specific antigen. A national survey
    Evelyn C Y Chan
    Division of General Internal Medicine, Department of Medicine, The University of Texas Houston Medical School, Houston, TX 77030, USA
    J Gen Intern Med 21:257-9. 2006
    ..There is inconclusive evidence that prostate cancer screening with prostate-specific antigen (PSA) reduces mortality. Although PSA testing is widespread, it is unknown how many physicians have taken the PSA test themselves...
  9. pmc Assessment of coronary heart disease risk by combined analysis of coagulation factors
    Nena Aleksic
    Department of Internal Medicine at Medical School, Vascular Biology Research Center at Brown Foundation Institute of Molecular Medicine, University of Texas Health Science Center at Houston, TX 77030, USA
    Atherosclerosis 198:294-300. 2008
    ..Prospective studies have reported a positive association of coagulation factors with risk of coronary heart disease (CHD). It is unclear whether these coagulation factors interact...
  10. doi request reprint Reduced-dose fibrinolytic acceleration of ST-segment elevation myocardial infarction treatment coupled with urgent percutaneous coronary intervention compared to primary percutaneous coronary intervention alone results of the AMICO (Alliance for Myocardia
    Ali E Denktas
    University of Texas Medical School and Memorial Hermann Heart and Vascular Institute, Houston, USA
    JACC Cardiovasc Interv 1:504-10. 2008
    ....
  11. ncbi request reprint The variable number of tandem repeat polymorphism of platelet glycoprotein Ibalpha and risk of coronary heart disease
    Vahid Afshar-Kharghan
    Thrombosis Research Section, Department of Medicine, BCM 286, N1319, Baylor College of Medicine, One Baylor Plaza, Houston, TX 77030, USA
    Blood 103:963-5. 2004
    ..In African Americans, the CC genotype (homozygous with 2 repeats) is associated with a lower risk of CHD events than all other genotypes...
  12. pmc Characterization of the inflammatory cells in ascending thoracic aortic aneurysms in patients with Marfan syndrome, familial thoracic aortic aneurysms, and sporadic aneurysms
    Rumin He
    Department of Internal Medicine, The University of Texas Medical School at Houston, Houston, Texas 77030, USA
    J Thorac Cardiovasc Surg 136:922-9, 929.e1. 2008
    ..This study sought to characterize the inflammatory infiltrate in ascending thoracic aortic aneurysm in patients with Marfan syndrome, familial thoracic aortic aneurysm, or nonfamilial thoracic aortic aneurysm...
  13. pmc Screening for colorectal cancer in a safety-net health care system: access to care is critical and has implications for screening policy
    Samir Gupta
    Department of Internal Medicine, Division of Digestive and Liver Diseases, The University of Texas Southwestern Medical Center, Dallas, TX 75390 8887, USA
    Cancer Epidemiol Biomarkers Prev 18:2373-9. 2009
    ..Data on the number of individuals eligible for screening, and rates of screening, are necessary to assess national colorectal cancer screening efforts. Such data are sparse for safety-net health systems...
  14. ncbi request reprint Mutations in smooth muscle alpha-actin (ACTA2) lead to thoracic aortic aneurysms and dissections
    Dong Chuan Guo
    Department of Internal Medicine, University of Texas Health Science Center at Houston, Houston, Texas 77030, USA
    Nat Genet 39:1488-93. 2007
    ..These data, along with the previously reported MYH11 mutations causing familial TAAD, indicate the importance of SMC contraction in maintaining the structural integrity of the ascending aorta...
  15. pmc Novel sequence feature variant type analysis of the HLA genetic association in systemic sclerosis
    David R Karp
    Department of Internal Medicine, UT Southwestern Medical Center, Dallas, TX 75390 8884, USA
    Hum Mol Genet 19:707-19. 2010
    ....
  16. ncbi request reprint Incidence of new coronary events in older persons with prior myocardial infarction and systemic hypertension treated with beta blockers, angiotensin-converting enzyme inhibitors, diuretics, calcium antagonists, and alpha blockers
    Wilbert S Aronow
    Department of Medicine, Westchester Medical Center New York Medical College, Valhalla, New York, USA
    Am J Cardiol 89:1207-9. 2002
  17. ncbi request reprint Pulmonary involvement in systemic sclerosis: associations with genetic, serologic, sociodemographic, and behavioral factors
    Terry A McNearney
    Division of Rheumatology, University of Texas Medical Branch at Galveston, Galveston, Texas 77555 1165, USA
    Arthritis Rheum 57:318-26. 2007
    ..To determine the relative contributions of genetic, clinical, serologic, sociodemographic, and behavioral/psychological variables to early pulmonary involvement in the Genetics versus Environment in Scleroderma Outcome Study cohort...
  18. ncbi request reprint Reduction of coronary events with aspirin in older patients with prior myocardial infarction treated with and without statins
    Wilbert S Aronow
    Department of Medicine, Westchester Medical Center, New York Medical College, Valhalla, NY 10595, USA
    Heart Dis 4:159-61. 2002
    ..01 for each 1-mg/dL increase), initial serum high-density lipoprotein cholesterol level (risk ratio, 0.96 for each 1-mg/dL increase), use of statins (risk ratio, 0.46), and use of aspirin (risk ratio, 0.48)...
  19. ncbi request reprint Incidence of new stroke or new myocardial infarction or death in patients with severe carotid arterial disease treated with and without statins
    Gautham Ravipati
    Department of Medicine, Cardiology Division, New York Medical College, Valhalla, New York, USA
    Am J Cardiol 98:1170-1. 2006
    ..18, p <0.0001), and previous MI (risk ratio 2.15, p <0.0001). In conclusion, statins decrease the incidence of new stroke or MI or death in patients with severe carotid arterial disease who do not undergo revascularization...
  20. ncbi request reprint Association of abnormal serum lipids in elderly persons with atherosclerotic vascular disease and dementia, atherosclerotic vascular disease without dementia, dementia without atherosclerotic vascular disease, and no dementia or atherosclerotic vascular d
    Vana Suryadevara
    Divisions of Geriatrics, Westchester Medical Center New York Medical College, Valhalla, NY, USA
    J Gerontol A Biol Sci Med Sci 58:M859-61. 2003
    ..Observational data have shown that the use of statins was associated with a lower prevalence of vascular dementia and of Alzheimer's disease...
  21. ncbi request reprint Elderly diabetics with peripheral arterial disease and no coronary artery disease have a higher incidence of new coronary events than elderly nondiabetics with peripheral arterial disease and prior myocardial infarction treated with statins and with no li
    Wilbert S Aronow
    Cardiology and Geriatrics Divisions, Department of Medicine, Westchester Medical Center New York Medical College, Valhalla 10804, USA
    J Gerontol A Biol Sci Med Sci 58:573-5. 2003
    ....
  22. ncbi request reprint Incidence of new coronary events in older persons with prior myocardial infarction and serum low-density lipoprotein cholesterol > or = 125 mg/dl treated with statins versus no lipid-lowering drug
    Wilbert S Aronow
    Department of Medicine, Westchester Medical Center New York Medical College, Valhalla, New York, USA
    Am J Cardiol 89:67-9. 2002
  23. ncbi request reprint Factor XIIIA Val34Leu polymorphism does not predict risk of coronary heart disease: The Atherosclerosis Risk in Communities (ARIC) Study
    Nena Aleksic
    Vascular Biology Research Center and Hematology Division, University of Texas Houston Medical School 77030, USA
    Arterioscler Thromb Vasc Biol 22:348-52. 2002
    ..This prospective study did not provide evidence of a reduced CHD risk for the FXIIIA 34Leu allele...
  24. ncbi request reprint Prevalence and association of ventricular tachycardia and complex ventricular arrhythmias with new coronary events in older men and women with and without cardiovascular disease
    Wilbert S Aronow
    Cardiology Division, Department of Medicine, Westchester Medical Center New York Medical College, Valhalla, New York 10804, USA
    J Gerontol A Biol Sci Med Sci 57:M178-80. 2002
    ..We report the prevalence of ventricular tachycardia (VT) and of complex ventricular arrhythmias (VA) and their association with new coronary events in older men and women...
  25. ncbi request reprint Incidence of new atherothrombotic brain infarction in older persons with prior myocardial infarction and serum low-density lipoprotein cholesterol >or=125 mg/dl treated with statins versus no lipid-lowering drug
    Wilbert S Aronow
    Cardiology Division, Westchester Medical Center New York Medical College, Valhalla, USA
    J Gerontol A Biol Sci Med Sci 57:M333-5. 2002
    ....
  26. ncbi request reprint Incidence of new stroke or new myocardial infarction or death at 39-month follow-up in patients with diabetes mellitus, hypertension or both with and without microalbuminuria
    Gautham Ravipati
    Department of Medicine, Cardiology Division, New York Medical College, Valhalla, NY 10595, USA
    Cardiology 109:62-5. 2008
    ..29). Microalbuminuria was not a significant independent predictor of new stroke or new MI or death, but LV mass index, diabetes mellitus, prior stroke, and prior MI were significant independent predictors...
  27. ncbi request reprint Risk factors for new atherothrombotic brain infarction in older Hispanic men and women
    Wilbert S Aronow
    Hebrew Hospital Home, Bronx, New York, USA
    J Gerontol A Biol Sci Med Sci 57:M61-3. 2002
    ..We report the prevalence and incidence of atherothrombotic brain infarction (ABI) in older Hispanic men and women in a long-term health care facility...
  28. doi request reprint Association of lung volumes with nocturnal oxygen saturation in obese persons: a possible role for therapeutic continuous positive airway pressure
    Stuart G Lehrman
    Department of Medicine, New York Medical College, Valhalla, NY 10595, USA
    Am J Ther 15:221-4. 2008
    ..005) Therapeutic nocturnal continuous positive airway pressure may have a role by improving ventilation-perfusion matching and thereby improving nocturnal oxygen saturation in these patients...
  29. ncbi request reprint FDA perspective on clinical trial design for cardiovascular devices
    Eric Chen
    Ann Thorac Surg 82:773-5. 2006
  30. ncbi request reprint Sample size estimation for GEE method for comparing slopes in repeated measurements data
    Sin Ho Jung
    Department of Biostatistics and Bioinformatics, Duke University Medical Center, Box 3627, Durham, NC 27710, USA
    Stat Med 22:1305-15. 2003
    ..Since the sample size formula is based on asymptotic theory, we investigate the performance of the estimated sample size in practical settings through simulations...
  31. ncbi request reprint Frequency of new coronary events in older persons with peripheral arterial disease and serum low-density lipoprotein cholesterol > or = 125 mg/dl treated with statins versus no lipid-lowering drug
    Wilbert S Aronow
    Cardiology Division, Department of Medicine, Westchester Medical Center New York Medical College, Valhalla, New York, USA
    Am J Cardiol 90:789-91. 2002
  32. ncbi request reprint Association of plasma homocysteine in elderly persons with atherosclerotic vascular disease and dementia, atherosclerotic vascular disease without dementia, dementia without atherosclerotic vascular disease, and no dementia or atherosclerotic vascular dis
    Samantha G Storey
    Division of Geriatrics, Department of Medicine, Westchester Medical Center New York Medical College, Valhalla 10595, USA
    J Gerontol A Biol Sci Med Sci 58:M1135-6. 2003
    ..Increased plasma homocysteine has been associated with atherosclerotic vascular disease in elderly persons. The Framingham Study found that plasma homocysteine was a risk factor for dementia and Alzheimer's disease...
  33. ncbi request reprint Elderly nursing home patients with congestive heart failure after myocardial infarction living in new york city have a higher prevalence of mortality in cold weather and warm weather months
    Wilbert S Aronow
    Cardiology and Geriatrics Divisions, Department of Medicine, Westchester Medical Center New York Medical College, Valhalla, NY, USA
    J Gerontol A Biol Sci Med Sci 59:146-7. 2004
    ..Some studies have found an increase in cardiac events in the winter months. Other studies, from cities in the southern half of the United States, have shown an increase in cardiac events during the summer months...
  34. ncbi request reprint Frequency of congestive heart failure in older persons with prior myocardial infarction and serum low-density lipoprotein cholesterol > or = 125 mg/dl treated with statins versus no lipid-lowering drug
    Wilbert S Aronow
    Cardiology Division, Department of Medicine, Westchester Medical Center New York Medical College, Valhalla, New York, USA
    Am J Cardiol 90:147-9. 2002
  35. ncbi request reprint A retrospective study of growth hormone use in adolescents with cystic fibrosis
    Dana S Hardin
    Department of Pediatrics, University of Texas South western Medical School, Dallas, TX 75390 9063, USA
    Clin Endocrinol (Oxf) 62:560-6. 2005
    ..Studies of growth hormone (GH) effectiveness in prepubertal children with cystic fibrosis (CF) have been published previously. We present a retrospective study of GH treatment in adolescents with CF...
  36. ncbi request reprint Increased fasting plasma insulin concentrations are associated with the severity of angiographic coronary artery disease
    Rishi Sukhija
    Department of Medicine, Cardiology Division, Westchester Medical Center New York Medical College, Valhalla, NY 10595, USA
    Angiology 56:249-51. 2005
    ..Stepwise ordinal logistic regression analysis identified increased fasting plasma insulin concentrations in these obese subjects as a significant independent risk factor for the severity of angiographic CAD (p < 0.0001)...
  37. ncbi request reprint Chi-square test for R x C contingency tables with clustered data
    Sin Ho Jung
    Department of Biostatistics and Bioinformatics, Duke University, Durham, North Carolina, USA
    J Biopharm Stat 13:241-51. 2003
    ..Simulation studies are conducted to show the finite-sample performance of the new methods. The proposed methods are applied to real-life data...
  38. ncbi request reprint Prevalence and incidence of cardiovascular disease in 1160 older men and 2464 older women in a long-term health care facility
    Wilbert S Aronow
    Hebrew Hospital Home, Bronx, New York, USA
    J Gerontol A Biol Sci Med Sci 57:M45-6. 2002
    ..We report the prevalence and incidence of cardiovascular disease in older men and women in a long-term health care facility...