Research Topics
| Michael L JohnsonSummaryAffiliation: University of Houston Country: USA Publications
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Detail Information
Publications
Antihypertensive drug use and the risk of dementia in patients with diabetes mellitusMichael L Johnson
Department of Clinical Sciences and Administration, Division of Pharmacy Administration and Public Health, University of Houston, College of Pharmacy, TX, USA
Alzheimers Dement 8:437-44. 2012..Diabetes and hypertension are independent risk factors for dementia, and hypertension may increase this risk in patients with diabetes. It is unclear whether antihypertensive drugs are associated with risk of dementia in these patients...- Good research practices for comparative effectiveness research: analytic methods to improve causal inference from nonrandomized studies of treatment effects using secondary data sources: the ISPOR Good Research Practices for Retrospective Database AnalysiMichael L Johnson
College of Pharmacy, Department of Clinical Sciences and Administration, University of Houston, Houston, TX 77030, USA
Value Health 12:1062-73. 2009..A Task Force was formed to offer a review of the more recent developments in statistical control of confounding... - The association of Medicare drug coverage with use of evidence-based medications in the Veterans Health AdministrationMichael L Johnson
College of Pharmacy, Department of Clinical Sciences and Administration, University of Houston, Houston, TX, USA
Ann Pharmacother 43:1565-75. 2009..Veterans with Medicare managed-care plans have access to pharmacy benefits outside the Veterans Health Administration (VA), but how this coverage affects use of medications for specific disease conditions within the VA is unclear... - Comparative effectiveness research: guidelines for good practices are just the beginningMichael L Johnson
University of Houston, College of Pharmacy, 1441 Moursund Street, Houston, TX 77030, USA
Expert Rev Pharmacoecon Outcomes Res 11:51-7. 2011.... 
Mortality after noncardiac surgery: prediction from administrative versus clinical dataHoward S Gordon
Houston Center for Quality of Care and Utilization Studies, the Michael E DeBakey Veterans Affairs Medical Center, Houston, Texas 77030, USA
Med Care 43:159-67. 2005..Hospital profiles are increasingly constructed using risk-adjusted clinical data abstracted from patient records...- Performance of endovascular aortic aneurysm repair in high-risk patients: results from the Veterans Affairs National Surgical Quality Improvement ProgramRuth L Bush
Michael E DeBakey Department of Surgery, Baylor College of Medicine, The University of Houston, College of Pharmacy, Houston, TX 77030, USA
J Vasc Surg 45:227-233; discussion 233-5. 2007..The purpose of our study was to evaluate outcomes after elective EVAR performed in high-risk veterans... - Risk of cerebrovascular adverse events in older adults using antipsychotic agents: a propensity-matched retrospective cohort studySandhya Mehta
Department of Clinical Sciences and Administration, College of Pharmacy, University of Houston, Texas Medical Center, Houston 77030 3407, USA
J Clin Psychiatry 71:689-98. 2010..To compare the risk of cerebrovascular adverse events with second-generation antipsychotic users versus those taking first-generation antipsychotics in community-dwelling older adults... - Risk factors for dementia in patients over 65 with diabetesNiraj M Parikh
College of Pharmacy, University of Houston, TX, USA
Int J Geriatr Psychiatry 26:749-57. 2011..This study identified factors in patients with diabetes associated with risk of developing dementia... - VHA pharmacy use in veterans with Medicare drug coverageRobert O Morgan
Division of Management, Policy, and Community Health, University of Texas School of Public Health, Houston, TX, USA
Am J Manag Care 15:e1-8. 2009..To determine how Medicare benefits affect veterans' use of Veterans Health Administration (VHA) pharmacy services... - Propensity score analysis in observational studies: outcomes after abdominal aortic aneurysm repairMichael L Johnson
Houston Center for Quality of Care and Utilization Studies, and Michael E. DeBakey Veterans Affairs Medical Center, Baylor College of Medicine, Houston VAMC, 2002 Holcomb Blvd (112, Houston, TX 77030, USA
Am J Surg 192:336-43. 2006..Patients who underwent elective EVAR had substantially lower perioperative mortality and morbidity rates compared with patients having open repair, which was not explained solely by patient selection in an observational dataset... - Hospitalization risk associated with typical and atypical antipsychotic use in community-dwelling elderly patientsRajender R Aparasu
Department of Clinical Sciences and Administration, College of Pharmacy, University of Houston, Texas Medical Center, Houston, Texas 77030, USA
Am J Geriatr Pharmacother 6:198-204. 2008..However, few studies have examined the impact of typical and atypical antipsychotic use on all-cause hospitalization in the elderly population... - Therapeutic goal attainment in patients with hypertension and dyslipidemiaMichael L Johnson
Houston Center for Quality of Care and Utilization Studies, Michael E DeBakey Veterans Affairs Medical Center and Department of Medicine, Section of Health Services Research, Baylor College of Medicine, Houston, Texas 77030, USA
Med Care 44:39-46. 2006..We sought to ascertain treatment patterns and attainment of therapeutic goals in patients with isolated and concomitant hypertension and dyslipidemia, both with and without diabetes mellitus (DM) and symptomatic cardiovascular disease... - Risk of falls and fractures in older adults using atypical antipsychotic agents: a propensity score-adjusted, retrospective cohort studySatabdi Chatterjee
Department of Clinical Sciences and Administration, College of Pharmacy, University of Houston, Texas Medical Center, Houston, Texas, USA
Am J Geriatr Pharmacother 10:83-94. 2012..However, none of the studies assessed the comparative safety profiles of atypical agents with respect to falls and fractures... - Risk of falls and fractures in older adults using antipsychotic agents: a propensity-matched retrospective cohort studySandhya Mehta
Department of Clinical Sciences and Administration, College of Pharmacy, University of Houston, Texas Medical Center, Houston, Texas 77030 3407, USA
Drugs Aging 27:815-29. 2010..Very few studies have compared the risk of falls and fractures among older adults using typical and atypical agents and none of the studies have evaluated differential risk across antipsychotic classes... - Open versus endovascular abdominal aortic aneurysm repair in VA hospitalsRuth L Bush
Houston Center for Quality of Care and Utilization Studies, Michael E DeBakey Veterans Affairs Medical Center, and Michael E DeBakey Department of Surgery, Baylor College of Medicine, Houston, TX 77030, USA
J Am Coll Surg 202:577-87. 2006.... - Prevalence of comorbid hypertension and dyslipidemia and associated cardiovascular diseaseMichael L Johnson
Houston Center for Quality of Care and Utilization Studies, Michael E DeBakey VA Medical Center, Houston, Tex 77030, USA
Am J Manag Care 10:926-32. 2004.... - Effect of certain angiotensin-converting enzyme inhibitors on mortality in heart failure: a multiple-propensity analysisAbhishek S Chitnis
Department of Clinical Sciences and Administration, College of Pharmacy, University of Houston, 1441 Moursund St, Houston, TX, USA
Res Social Adm Pharm 8:145-56. 2012..There is a substantial evidence about efficacy of angiotensin-converting enzyme inhibitors (ACEIs) in heart failure (HF); however, there is no conclusive evidence on the relative effectiveness of individual ACEIs... - Mortality after cardiac bypass surgery: prediction from administrative versus clinical dataJane M Geraci
Houston Center for Quality of Care and Utilization Studies, Houston Veterans Affairs Medical Center, and the Section of Health Services Research, Department of Medicine, Baylor College of Medicine, Houston, Texas 77030, USA
Med Care 43:149-58. 2005.... 
Burden of COPD in a government health care system: a retrospective observational study using data from the US Veterans Affairs populationAmir Sharafkhaneh
Baylor College of Medicine, Houston, TX, USA
Int J Chron Obstruct Pulmon Dis 5:125-32. 2010..Health care utilization and costs among US veterans with chronic obstructive pulmonary disease (COPD) were compared with those in veterans without COPD...- Patterns of antihypertensive therapy among patients with diabetesMichael L Johnson
Houston Center for Quality of Care and Utilization Studies, Michael E DeBakey Veterans Affairs Medical Center, Department of Medicine, Baylor College of Medicine, Houston, TX, USA
J Gen Intern Med 20:842-6. 2005..Hypertension is extremely prevalent in patients with diabetes. Limited data exist on whether patterns of antihypertensive use in this population are consistent with evidence-based practice guidelines... - Prescribing patterns of diuretics in multi-drug antihypertensive regimensHardeep Singh
VA Medical Center 111PC, 2002 Holcombe Boulevard, Houston, TX 77030, USA
J Clin Hypertens (Greenwich) 7:81-7; quiz 88-9. 2005..Though overall diuretic use seems to be increasing as compared with previous studies, there is room for improvement in the use of thiazides in multi-drug hypertension regimens... - Antipsychotic utilization and expenditure trends among elderly personsElda Jano
Department of Clinical Sciences and Administration, College of Pharmacy, University of Houston, Texas Medical Center, 1441 Moursund St, Houston, TX 77030-3407, USA
Psychiatr Serv 58:1400. 2007 - Comparative Risk of Cerebrovascular Adverse Events in Community-Dwelling Older Adults using Risperidone, Olanzapine and Quetiapine : A Multiple Propensity Score-Adjusted Retrospective Cohort StudySatabdi Chatterjee
Department of Clinical Sciences and Administration, College of Pharmacy, Texas Medical Center, University of Houston, 1441 Moursund Street, Houston, TX, 77030, USA
Drugs Aging 29:807-17. 2012..However, limited evidence exists regarding comparative cerebrovascular profiles of individual atypical agents, particularly in community settings... - Adapting the Rx-Risk-V for mortality prediction in outpatient populationsMichael L Johnson
Houston Center for Quality of Care and Utilization Studies, Michael E DeBakey Veterans Affairs Medical Center, Houston, TX 77030, USA
Med Care 44:793-7. 2006..We sought to operationalize, test, and validate an outpatient pharmacy-based case-mix adjuster... - Does diabetes mellitus alter the onset and clinical course of vascular dementia?Santosh B Murthy
Department of Neurology, Baylor College of Medicine, Houston, TX, USA
Behav Neurol 23:145-51. 2010..Multiple risk factors are associated with VaD, but the individual contribution of each to disease onset and progression is unclear. We examined the relationship between diabetes mellitus type 2 (DM) and the clinical variables of VaD... - Statins are associated with a reduced risk of hepatocellular carcinoma in a large cohort of patients with diabetesHashem B El-Serag
Section of Gastroenterology at the Michael E DeBakey Veterans Affairs Medical Center and Baylor College of Medicine, Houston, Texas 77030, USA
Gastroenterology 136:1601-8. 2009..Given the increasing prevalence of statin use, and the increasing incidence of hepatocellular carcinoma (HCC), the potential association between statins and HCC is an important issue to examine... - Application of the nonlinear Blinder-Oaxaca decomposition to study racial/ethnic disparities in antiobesity medication use in the United StatesHemalkumar B Mehta
Department of Clinical Sciences and Administration, College of Pharmacy, University of Houston, 1441 Moursund St, Houston, TX 77030, USA
Res Social Adm Pharm 9:13-26. 2013..The present study demonstrates the use of this method for categorical variables by addressing antiobesity medication use disparity... - A model to predict mortality following Pseudomonas aeruginosa bacteremiaElizabeth B Hirsch
University of Houston College of Pharmacy, Houston, TX 77030, USA
Diagn Microbiol Infect Dis 72:97-102. 2012..21 and 1.92, respectively. Our model was reasonable in predicting 30-day mortality in patients with P. aeruginosa bacteremia. Our results may be useful for developing strategies to reduce mortality attributed to P. aeruginosa... - Process of care in Hispanic, black, and white VA beneficiariesHoward S Gordon
Houston Center for Quality of Care and Utilization Studies, Section of General Medicine, Veterans Affairs Medical Center, TX, USA
Med Care 40:824-33. 2002..To examine whether process of hospital care differs among Hispanic, black, and white VA beneficiaries... - Incidence and consequences of total body potassium depletion in chronic hemodialysis patientsGeorge M Dolson
Renal Section, Department of Medicine, Veterans Affairs Medical Center, 2002 Holcombe Blvd, Houston, TX 77030, USA
Front Biosci 8:a126-32. 2003..METHODOLOGY AND OUTCOME MEASURE: TBK by whole-body counting of 40K, dialysis potassium losses, and patient demographic characteristics were determined. Survival was evaluated retrospectively after seven years of follow-up...