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Dive into the research topics where Deanna R. Willis is active.

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Featured researches published by Deanna R. Willis.


European Journal of Operational Research | 2007

Matching daily healthcare provider capacity to demand in advanced access scheduling systems

Xiuli Qu; Ronald L. Rardin; Julie Ann Stuart Williams; Deanna R. Willis

Advanced access scheduling, introduced in the early 1990s, is reported to significantly improve the performance of outpatient clinics. The successful implementation of advanced access scheduling requires the match of daily healthcare provider capacity with patient demand. In this paper, for the first time a closed-form approach is presented to determine the optimal percentage of open-access appointments to match daily provider capacity to demand. This paper introduces the conditions for the optimal percentage of open-access appointments and the procedure to find the optimal percentage. Furthermore, the sensitivity of the optimal percentage of open-access appointments to provider capacity, no-show rates, and demand distribution is investigated. Our results demonstrate that the optimal percentage of open-access appointments mainly depends on the ratio of the average demand for open-access appointments to provider capacity and the ratio of the show-up rates for prescheduled and open-access appointments.


Aging & Mental Health | 2011

Implementing dementia care models in primary care settings: The Aging Brain Care Medical Home

Christopher M. Callahan; Malaz Boustani; Michael W. Weiner; Robin A. Beck; Lee R. Livin; Jeffrey J. Kellams; Deanna R. Willis; Hugh C. Hendrie

Objectives: The purpose of this article is to describe our experience in implementing a primary care-based dementia and depression care program focused on providing collaborative care for dementia and late-life depression. Methods: Capitalizing on the substantial interest in the US on the patient-centered medical home concept, the Aging Brain Care Medical Home targets older adults with dementia and/or late-life depression in the primary care setting. We describe a structured set of activities that laid the foundation for a new partnership with the primary care practice and the lessons learned in implementing this new care model. We also provide a description of the core components of this innovative memory care program. Results: Findings from three recent randomized clinical trials provided the rationale and basic components for implementing the new memory care program. We used the reflective adaptive process as a relationship building framework that recognizes primary care practices as complex adaptive systems. This framework allows for local adaptation of the protocols and procedures developed in the clinical trials. Tailored care for individual patients is facilitated through a care manager working in collaboration with a primary care physician and supported by specialists in a memory care clinic as well as by information technology resources. Conclusions: We have successfully overcome many system-level barriers in implementing a collaborative care program for dementia and depression in primary care. Spontaneous adoption of new models of care is unlikely without specific attention to the complexities and resource constraints of health care systems.


Health Informatics Journal | 2010

Using no-show modeling to improve clinic performance.

Joanne K. Daggy; Mark Lawley; Deanna R. Willis; Debra Thayer; Christopher Suelzer; Poching DeLaurentis; Ayten Turkcan; Santanu Chakraborty; Laura P. Sands

‘No-shows’ or missed appointments result in under-utilized clinic capacity. We develop a logistic regression model using electronic medical records to estimate patients’ no-show probabilities and illustrate the use of the estimates in creating clinic schedules that maximize clinic capacity utilization while maintaining small patient waiting times and clinic overtime costs. This study used information on scheduled outpatient appointments collected over a three-year period at a Veterans Affairs medical center. The call-in process for 400 clinic days was simulated and for each day two schedules were created: the traditional method that assigned one patient per appointment slot, and the proposed method that scheduled patients according to their no-show probability to balance patient waiting, overtime and revenue. Combining patient no-show models with advanced scheduling methods would allow more patients to be seen a day while improving clinic efficiency. Clinics should consider the benefits of implementing scheduling software that includes these methods relative to the cost of no-shows.


BMC Health Services Research | 2012

No-shows to primary care appointments: subsequent acute care utilization among diabetic patients

Lynn Nuti; Mark Lawley; Ayten Turkcan; Zhiyi Tian; Lingsong Zhang; Karen Chang; Deanna R. Willis; Laura P. Sands

BackgroundPatients who no-show to primary care appointments interrupt clinicians’ efforts to provide continuity of care. Prior literature reveals no-shows among diabetic patients are common. The purpose of this study is to assess whether no-shows to primary care appointments are associated with increased risk of future emergency department (ED) visits or hospital admissions among diabetics.MethodsA prospective cohort study was conducted using data from 8,787 adult diabetic patients attending outpatient clinics associated with a medical center in Indiana. The outcomes examined were hospital admissions or ED visits in the 6 months (182 days) following the patient’s last scheduled primary care appointment. The Andersen-Gill extension of the Cox proportional hazard model was used to assess risk separately for hospital admissions and ED visits. Adjustment was made for variables associated with no-show status and acute care utilization such as gender, age, race, insurance and co-morbid status. The interaction between utilization of the acute care service in the six months prior to the appointment and no-show was computed for each model.ResultsThe six-month rate of hospital admissions following the last scheduled primary care appointment was 0.22 (s.d. = 0.83) for no-shows and 0.14 (s.d. = 0.63) for those who attended (p < 0.0001). No-show was associated with greater risk for hospitalization only among diabetics with a hospital admission in the prior six months. Among diabetic patients with a prior hospital admission, those who no-showed were at 60% greater risk for subsequent hospital admission (HR = 1.60, CI = 1.17–2.18) than those who attended their appointment. The six-month rate of ED visits following the last scheduled primary care appointment was 0.56 (s.d. = 1.48) for no-shows and 0.38 (s.d. = 1.05) for those who attended (p < 0.0001); after adjustment for covariates, no-show status was not significantly related to subsequent ED utilization.ConclusionsNo-show to a primary care appointment is associated with increased risk for hospital admission among diabetics recently hospitalized.


Health Care Management Review | 2008

Structural and process factors affecting the implementation of antimicrobial resistance prevention and control strategies in U.S. hospitals

Ann F. Chou; Elizabeth M. Yano; Kimberly McCoy; Deanna R. Willis; Bradley N. Doebbeling

Background: To address increases in the incidence of infection with antimicrobial-resistant pathogens, the National Foundation for Infectious Diseases and Centers for Disease Control and Prevention proposed two sets of strategies to (a) optimize antibiotic use and (b) prevent the spread of antimicrobial resistance and control transmission. However, little is known about the implementation of these strategies. Purpose: Our objective is to explore organizational structural and process factors that facilitate the implementation of National Foundation for Infectious Diseases/Centers for Disease Control and Prevention strategies in U.S. hospitals. Methods: We surveyed 448 infection control professionals from a national sample of hospitals. Clinically anchored in the Donabedian model that defines quality in terms of structural and process factors, with the structural domain further informed by a contingency approach, we modeled the degree to which National Foundation for Infectious Diseases and Centers for Disease Control and Prevention strategies were implemented as a function of formalization and standardization of protocols, centralization of decision-making hierarchy, information technology capabilities, culture, communication mechanisms, and interdepartmental coordination, controlling for hospital characteristics. Findings: Formalization, standardization, centralization, institutional culture, provider-management communication, and information technology use were associated with optimal antibiotic use and enhanced implementation of strategies that prevent and control antimicrobial resistance spread (all p < .001). However, interdepartmental coordination for patient care was inversely related with antibiotic use in contrast to antimicrobial resistance spread prevention and control (p < .0001). Implications: Formalization and standardization may eliminate staff role conflict, whereas centralized authority may minimize ambiguity. Culture and communication likely promote internal trust, whereas information technology use helps integrate and support these organizational processes. These findings suggest concrete strategies for evaluating current capabilities to implement effective practices and foster and sustain a culture of patient safety.


Journal of Health Care for the Poor and Underserved | 2010

Screening, Referral, and Participation in a Weight Management Program Implemented in Five CHCs

Daniel O. Clark; Lisa Chrysler; Anthony J. Perkins; NiCole R. Keith; Deanna R. Willis; Greg Abernathy; Faye Smith

Community health centers have the potential to lessen obesity. We conducted a retrospective evaluation of a quality improvement program that included electronic body mass index (BMI) screening with provider referral to an in-clinic lifestyle behavior change counselor with weekly nutrition and exercise classes. There were 26,661 adult patients seen across five community health centers operating the weight management program. There were 23,593 (88%) adult patients screened, and 12,487 (53%) of these patients were overweight or obese (BMI ≥25). Forty percent received a provider referral, 15.6% had program contact, and 2.1% had more than 10 program contacts. A mean weight loss of seven pounds was observed among those patients with more than 10 program contacts. No significant weight change was observed in patients with less contact. Achieving public health impact from guideline recommended approaches to CHC-based weight management will require considerable improvement in patient and provider participation.


Journal of Health Care for the Poor and Underserved | 2008

Design and Reach of a Primary Care Weight Management Program

Daniel O. Clark; NiCole R. Keith; Lisa Chrysler; Anthony J. Perkins; Deanna R. Willis

Purpose. To report the reach of Take Charge Lite (TCL), a lifestyle weight management program. Methods. Eight months of data were used to determine prescription reach (number of patients receiving a TCL prescription divided by total eligible), visit reach (number of patients with a TCL visit divided by total receiving a prescription), and total reach (number of patients with a TCL visit divided by total eligible). Results. TCL prescription reach was 42.3% (1,071 prescriptions/2,528 eligible). There were 411 TCL first visits for an average visit reach of 38% (411/1,071). Total reach for the full period was 16% (411/2,528). Total reach was highest among female, middle-aged, and Black patients. Conclusion. There is potential for public health impact from such efforts but issues of reach require further planning and evaluation.


Family Medicine | 2018

Satisfaction, Motivation, and Retention in Academic Faculty Incentive Compensation Systems: A CERA Survey

Deanna R. Willis; Jane R. Williams; Kevin B. Gebke; George R. Bergus

BACKGROUND AND OBJECTIVES The use of incentive compensation in academic family medicine has been a topic of interest for many years, yet little is known about the impact of these systems on individual faculty members. Better understanding is needed about the relationship of incentive compensation systems (ICSs) to ICS satisfaction, motivation, and retention among academic family medicine faculty. METHODS The Council of Academic Family Medicine (CAFM) Educational Research Alliance (CERA) conducted a nationwide survey of its members in 2013. This study reports the results of the incentive compensation question subset of the larger omnibus survey. RESULTS The overall response rate was 53%. The majority (70% [360/511]) of academic faculty reported that they are eligible for some type of incentive compensation. The faculty reported moderate satisfaction, with only 38% being satisfied or highly satisfied with their ICS. Overall mean motivation and intent to remain in their current position were similar. The percentage of total income available as an incentive explained less than 10% of the variance of those outcomes. Faculty perceptions of appropriateness of the measures, understanding of the measurement and reward systems, and perception of due process are all related to satisfaction with the ICS, motivation, and retention. CONCLUSIONS ICSs are common in academic family medicine, yet most faculty do not find them to motivate their choice of activities or promote staying in their current position. Design and implementation are both important in promoting faculty satisfaction with the ICS, motivation, and retention.


Health Care Management Science | 2007

Effects of clinical characteristics on successful open access scheduling

Renata Kopach; Po Ching Delaurentis; Mark Lawley; Kumar Muthuraman; Leyla Ozsen; Ron Rardin; Hong Wan; Paul Intrevado; Xiuli Qu; Deanna R. Willis


Health Care Management Science | 2009

Improving patient flow at an outpatient clinic: study of sources of variability and improvement factors

Suresh Chand; Herbert Moskowitz; John B. Norris; Steve Shade; Deanna R. Willis

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Celette Sugg Skinner

Washington University in St. Louis

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Connie Krier

Indiana University Bloomington

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