Browse Health
Family Practitioner, Primary Care Doctor
34 years of experience
Accepting new patients
Video profile


Education ?

Medical School Score
University of Louisville (1978)

Awards & Distinctions ?

Castle Connolly's Top Doctors™ (2013)
NCQA Physician Practice Connections - Patient Centered Medical Home (2013 - 2016)
American Board of Family Medicine

Affiliations ?

Dr. Engle is affiliated with 5 hospitals.

Hospital Affiliations



  • Maryvale Hospital Medical Center
    5102 W Campbell Ave, Phoenix, AZ 85031
    Top 25%
  • Mayo Clinic Hospital
    5777 E Mayo Blvd, Phoenix, AZ 85054
    Top 25%
  • St Joseph's Hospital
    350 W Thomas Rd, Phoenix, AZ 85013
    Top 25%
  • Phoenix Children's Hospital
    1919 E Thomas Rd, Phoenix, AZ 85016
    Top 50%
  • Mayo Clinic - Arizona
    13400 E Shea Blvd, Scottsdale, AZ 85259
  • Publications & Research

    Dr. Engle has contributed to 25 publications.
    Title Strengthening Organizations to Implement Evidence-based Clinical Practices.
    Date January 2011
    Journal Health Care Management Review

    Despite recognition that implementation of evidence-based clinical practices (EBPs) usually depends on the structure and processes of the larger health care organizational context, the dynamics of implementation are not well understood. This project's aim was to deepen that understanding by implementing and evaluating an organizational model hypothesized to strengthen the ability of health care organizations to facilitate EBPs. CONCEPTUAL MODEL: The model posits that implementation of EBPs will be enhanced through the presence of three interacting components: active leadership commitment to quality, robust clinical process redesign incorporating EBPs into routine operations, and use of management structures and processes to support and align redesign.

    Title Welcome.
    Date June 2010
    Journal Bulletin of the New York Academy of Medicine
    Title Diagnosis and Treatment of Lyme Disease.
    Date June 2008
    Journal Mayo Clinic Proceedings. Mayo Clinic

    Lyme disease is the most common tick-borne disease in the United States. This review details the risk factors, clinical presentation, treatment, and prophylaxis for the disease. Information was obtained from a search of the PubMed and MEDLINE databases (keyword: Lyme disease) for articles published from August 31, 1997, through September 1, 2007. Approximately 20,000 cases of Lyme disease are reported annually. Residents of the coastal Northeast, northwest California, and the Great Lakes region are at highest risk. Children and those spending extended time outdoors in wooded areas are also at increased risk. The disease is transmitted to humans through the bite of the Ixodes tick (Ixodes scapularis and Ixodes pacificus). Typically, the tick must feed for at least 36 hours for transmission of the causative bacterium, Borrelia burgdorferi, to occur. Each of the 3 stages of the disease is associated with specific clinical features: early localized infection, with erythema migrans, fever, malaise, fatigue, headache, myalgias, and arthralgias; early disseminated infection (occurring days to weeks later), with neurologic, musculoskeletal, or cardiovascular symptoms and multiple erythema migrans lesions; and late disseminated infection, with intermittent swelling and pain of 1 or more joints (especially knees). Neurologic manifestations (neuropathy or encephalopathy) may occur. Diagnosis is usually made clinically. Treatment is accomplished with doxycycline or amoxicillin; cefuroxime axetil or erythromycin can be used as an alternative. Late or severe disease requires intravenous ceftriaxone or penicillin G. Single-dose doxycycline (200 mg orally) can be used as prophylaxis in selected patients. Preventive measures should be emphasized to patients to help reduce risk.

    Title Country of Origin and Racio-ethnicity: Are There Differences in Perceived Organizational Cultural Competency and Job Satisfaction Among Nursing Assistants in Long-term Care?
    Date February 2008
    Journal Health Care Management Review

    BACKGROUND: Long-term care facilities nationwide are finding it difficult to train and retain sufficient numbers of nursing assistants, resulting in a dire staffing situation. Researchers, managers, and practitioners alike have been trying to determine the correlates of job satisfaction to address this increasingly untenable situation. One factor that has received little empirical attention in the long-term care literature is cultural competence. Cultural competence is defined as a set of skills, attitudes, behaviors, and policies that enable organizations and staff to work effectively in cross-cultural situations. PURPOSE: To examine organizational cultural competence as perceived by nursing assistants and determine if this was related to differences in job satisfaction across countries of origin and racio-ethnic groups. METHODS: Primary data collected from a cross-section of 135 nursing assistants at four New England nursing homes. Demographics, perceptions of organizational cultural competence, and ratings of job satisfaction were collected. A multivariate, generalized linear model was used to assess predictors of job satisfaction. A secondary analysis was then conducted to identify the most important components of organizational cultural competency. RESULTS: Perception of organizational cultural competence (p = .0005) and autonomy (p = .001) were the strongest predictors of job satisfaction among nursing assistants; as these increase, job satisfaction also increases. Neither country of origin nor racio-ethnicity was associated with job satisfaction, but racio-ethnicity was associated with perceived organizational cultural competence (p = .05). A comfortable work environment for employees of different races/cultures emerged as the strongest organizational cultural competency factor (p = .04). RECOMMENDATIONS: Developing and maintaining organizational cultural competency and employee autonomy are important managerial strategies for increasing job satisfaction and improving staff retention. Toward this end, creating a comfortable work environment for employees of different races/cultures is an integral part of the process. Managerial recommendations are discussed.

    Title An Exploration of Job Design in Long-term Care Facilities and Its Effect on Nursing Employee Satisfaction.
    Date December 2006
    Journal Health Care Management Review

    This study used quantitative and qualitative methods to examine the design of nursing jobs in long-term care facilities and the effect of job design on employee satisfaction.

    Title Attempts to Use Computers As Diagnostic Aids in Medical Decision Making: a Thirty-year Experience.
    Date May 1992
    Journal Perspectives in Biology and Medicine

    For more than 30 years our group of physicians, statisticians, and computer scientists has worked toward developing a computer program with the capability of a trained physician to make diagnostic decisions in the relatively broad medical subspecialty of hematology. We devised and tested many programs, none of which have been sufficiently useful to warrant carrying beyond the pilot-study stage. We analyzed the reasons for this failure. Our experience confirms the great difficulty, and even the impossibility, of incorporating the complexity of human thought into a system that can be handled by a computer. We concluded that we should stop trying to make a computer act like a diagnostician and concentrate instead on ways of making computer-generated relevant information available to physicians as they make decisions.

    Title The Evolution, Uses, and Present Problems of the Patient's Medical Record As Exemplified by the Records of the New York Hospital from 1793 to the Present.
    Date November 1991
    Journal Transactions of the American Clinical and Climatological Association
    Title Why Expert Systems for Medical Diagnosis Are Not Being Generally Used: a Valedictory Opinion.
    Date July 1987
    Journal Bulletin of the New York Academy of Medicine
    Title Risk Factors for Breast Cancer.
    Date March 1983
    Journal American Journal of Epidemiology

    Since 1976, data were collected to evaluate risk factors for breast cancer in a hospital-based case-control study of 1185 women with breast cancer and 3227 controls. The risk of breast cancer increased with increasing age at first birth; this effect was not accounted for by parity. An early age at first birth appeared to reduce the risk relative to no pregnancy, whereas a late age at first birth was associated with a higher risk than not having a full-term pregnancy. High parity was associated with a reduction in the risk that was independent of that of age at first birth: for parity greater than or equal to 5, compared with parity 1-2, the relative risk estimate was 0.7 (95% confidence interval, 0.5-1.0). Late age at menarche was associated with a lower risk among premenopausal women but not among postmenopausal women. The relative risk decreased with increasing obesity among premenopausal women. Among postmenopausal women, the risk was higher among those who were obese, but there was no evidence of a trend with increasing body mass index. Risk did not vary materially according to history of abortion when gravidity was controlled. Risk was lower among postmenopausal women than among premenopausal women of the same age and increased with increasing age at menopause; bilateral oophorectomy reduced the risk more than hysterectomy alone. A positive history of benign breast disease, a positive family history of breast cancer, Jewish religion, and 12 or more years of education were each independently associated with an increased risk of breast cancer.

    Title Epithelial Ovarian Cancer and Combination Oral Contraceptives.
    Date August 1982
    Journal Jama : the Journal of the American Medical Association

    The risk of epithelial ovarian cancer in relation to the use of combination oral contraceptives was evaluated in a case-control study of women younger than 60 years. Combination oral contraceptives were used by 35 (26%) of 136 cases and 187 (35%) of 539 controls. The relative risk estimate for combination oral contraceptive use was 0.6 (95% confidence interval, 0.4 to 0.9). The reduction in risk appeared to persist for as long as ten years after use had ceased and to be greater for longer durations of use, but these results were not statistically significant. The findings were not explained by parity or by other identified potential confounding factors. The results suggest that the use of combination oral contraceptives protects against epithelial ovarian cancer.

    Title Breast Cancer and Alcoholic-beverage Consumption.
    Date April 1982
    Journal Lancet

    The relation between breast cancer and alcoholic-beverage consumption was evaluated in a case-control study of 1152 women with breast cancer and two groups of control women-519 with endometrial or ovarian cancer, and 2702 with non-malignant disorders. The relative-risk estimate of breast cancer, with allowance for all potential distorting factors, for women who had ever drunk alcoholic beverages relative to those who had never drunk was 1.4 (95% confidence interval, 1.0-2.0) when the comparison group was the group with endometrial or ovarian cancer and 1.9 (1.5-2.4) when the controls who had non-malignant disorders were the comparison group. The association was evident for beer, wine, and spirits. The association was not explained by any of the major known risk factors for breast cancer, but we had no information on dietary factors. The findings support the hypothesis that alcohol consumption, or related dietary factors, increases the risk of breast cancer.

    Title Decreased Risk of Endometrial Cancer Among Oral-contraceptive Users.
    Date December 1980
    Journal The New England Journal of Medicine
    Title Evidence for Structural Homology Between Human Red Cell Phosphoglycerate Mutase and 2,3-bisphosphoglycerate Synthase.
    Date February 1978
    Journal The Journal of Biological Chemistry

    Previous reports have suggested the possibility of extensive structural homology between human erythrocyte bisphosphoglycerate synthase (glycerate-1,3-P2 leads to glycerate-2,3-P2) and phosphoglycerate mutase (glycerate-3-P in equilibrium glycerate-2-P). This study lends credence to that conjecture through comparative physicochemical investigations involving peptide mapping, circular dichroism, and immunological techniques. The data indicate that despite differences in function, both enzymes apparently manifest a high degree of similarity in primary, secondary, and tertiary structure. Mapping data also indicate that each protein is comprised of two apparently identical subunits.

    Title Presentation of the Academy Plaque to Paul Reznikoff, M.d.
    Date January 1977
    Journal Bulletin of the New York Academy of Medicine
    Title Histone Interactions in Solution and Susceptibility to Denaturation.
    Date October 1976
    Journal Biochemistry

    Histone interactions in solution may depend upon treatments used for purification. Optical rotatory dispersion and sedimentation-velocity measurements have been made in a reference solvent, before and after exposure to various treatments, to investigate histone susceptibility to irreversible denaturation. Some acid conditions and urea and guanidine solutions may denature. Interaction studies performed on nondenatured histones indicate that the dimer, (H4)(H3), and tetramer, (H4)2(H3)2, dissociate to monomers at low ionic strength. Sedimentation-velocity experiments suggest a model for the (H4)2(H3)2 tetramer, with a compact semispherical center and four protruding amino-terminal regions. Fractions H2a and H2b interact to form the mixed dimer in equilibrium with monomers. Fraction H2a self-associates readily to dimers, tetramers, and octamers, while fraction H1 associates only weakly to form dimers.

    Title Prolonged Moderate Hypothermia and Experimental Endotoxin Shock.
    Date August 1976
    Journal The Journal of Surgical Research
    Title Heme: a Computer Aid to Diagnosis of Hematologic Disease.
    Date August 1976
    Journal Bulletin of the New York Academy of Medicine
    Title Heme: a Computer Program for Diagnosis-oriented Analysis of Hematologic Disease.
    Date December 1975
    Journal Transactions of the American Clinical and Climatological Association
    Title The Granulocytic Response in Nonspecific Ulcerative Colitis.
    Date March 1969
    Journal The American Journal of Digestive Diseases
    Title Influence of Testosterone on the Development of Bone Marrow at Sites of Transplanted Bladder Mucosa.
    Date March 1967
    Journal Investigative Urology
    Title Correlation of Immunologic and Structural Heterogeneity of Bence Jones Proteins.
    Date February 1967
    Journal Journal of Immunology (baltimore, Md. : 1950)
    Title Detection of Complement Components on Unlysed Erythrocytes from Acid Hemolysis and Thrombin Test Reactions in Paroxysmal Nocturnal Hemoglobinuria.
    Date August 1966
    Journal The Journal of Clinical Investigation
    Title Two Bence Jones Proteins of Different Immunologic Types in the Same Patient with Multiple Myeloma.
    Date April 1966
    Journal Blood
    Title Amino Acid Generation Following Platelet-antibody Interaction.
    Date March 1966
    Journal Vox Sanguinis
    Title Subtypes of Bence-jones Proteins.
    Date January 1966
    Journal Journal of Immunology (baltimore, Md. : 1950)

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