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Biomedical subjects

David G Marrero

Publications and source records attributed to David G Marrero.

At least 19 recordsLinked to original sources
PubMed2006

The association between quality of care and the intensity of diabetes disease management programs.

BACKGROUND: Although disease management programs are widely implemented, little is known about their effectiveness. OBJECTIVE: To determine whether disease management by physician groups is associated with diabetes care processes, control of intermediate outcomes, or the amount of medication used when intermediate outcomes are above target levels. DESIGN: Cross-sectional study. SETTING: Patients were randomly sampled from 63 physician groups nested in 7 health plans sponsored by Translating Research into Action for Diabetes (87%) and from 4 health plans with individual physician contracts (13%). PATIENTS: 8661 adults with diabetes who completed a survey (2000-2001) and had medical record data. MEASUREMENTS: Physician group and health plan directors described their organizations' use of physician reminders, performance feedback, and structured care management on a survey; their responses were used to determine measures of intensity of disease management. The current study measured 8 processes of care, including most recent hemoglobin A1c level, systolic blood pressure, serum low-density lipoprotein cholesterol level, and several measures of medication use. RESULTS: Increased use of any of 3 disease management strategies was significantly associated with higher adjusted rates of retinal screening, nephropathy screening, foot examinations, and measurement of hemoglobin A1c levels. Serum lipid level testing and influenza vaccine administration were associated with greater use of structured care management and performance feedback. Greater use of performance feedback correlated with an increased rate of foot examinations (difference, 5 percentage points [95% CI, 1 to 8 percentage points]), and greater use of physician reminders was associated with an increased rate of nephropathy screening (difference, 15 percentage points [CI, 6 to 23 percentage points]). No strategies were associated with intermediate outcome levels or level of medication management. LIMITATIONS: Physician groups were not randomly sampled from population-based listings, and disease management strategies were not randomly allocated across groups. CONCLUSIONS: Disease management strategies were associated with better processes of diabetes care but not with improved intermediate outcomes or level of medication management. A greater focus on direct measurement, feedback, and reporting of intermediate outcome levels or of level of medication management may enhance the effectiveness of these programs.

Aged↗
PubMed2006

The association between clinical care strategies and the attenuation of racial/ethnic disparities in diabetes care: the Translating Research Into Action for Diabetes (TRIAD) Study.

OBJECTIVE: We sought to determine whether greater implementation of clinical care strategies in managed care is associated with attenuation of known racial/ethnic disparities in diabetes care. RESEARCH DESIGN AND METHODS: Using cross-sectional data, we examined the quality of diabetes care as measured by frequencies of process delivery as well as medication management of intermediate outcomes, for 7426 black, Latinos, Asian/Pacific Islanders, and white participants enrolled in 10 managed care plans within 63 provider groups. We stratified models by intensity of 3 clinical care strategies at the provider group level: physician reminders, physician feedback, or use of a diabetes registry. RESULTS: Exposure to clinical care strategy implementation at the provider group level varied by race and ethnicity, with <10% of black participants enrolled in provider groups in the highest-intensity quintile for physician feedback and <10% of both black and Asian/Pacific Islander participants enrolled in groups in the highest-intensity quintile for diabetes registry use. Although disparities in care were confirmed, particularly for black relative to white subjects, we did not find a consistent pattern of disparity attenuation with increasing implementation intensity for either processes of care or medication management of intermediate outcomes. CONCLUSIONS: For the most part, high-intensity implementation of a diabetes registry, physician feedback, or physician reminders, 3 clinical care strategies similar to those used in many health care settings, are not associated with attenuation of known disparities of diabetes care in managed care.

Cross-Sectional Studies↗
PubMed2006

How do parents perceive their adolescent's diabetes: a qualitative study.

BACKGROUND/AIMS: The developmental tasks of adolescence, combined with physical changes, can interfere with self-management behaviour. Yet little is known about how parents view these challenges as they attempt to help their children cope with diabetes. Our objective was to understand how living with an adolescent with diabetes influences parents' perceptions of their child's well-being, their relationship with their child, and how they perceive the influence of peers and school on their child's diabetes. METHODS: Twenty-eight parents of adolescents with Type 1 diabetes, aged 13-18 years, participated in focus groups. Transcripts were analysed using qualitative methods to determine dominant themes and incidence density. RESULTS: Themes included how diabetes negatively influences their adolescent's lifestyle, how diabetes makes it difficult for parents to understand developmental challenges experienced by their child, concerns regarding the potential to develop long-term complications, perceptions on how diabetes impacts on their relationship with their child and relationships with peers and how their children's school impacts on their diabetes self-management CONCLUSIONS: This qualitative focus group study provides insight into parental perceptions of adolescents living with Type 1 diabetes, specifically as it relates to lifestyle implications, relationships with parents, peers and physicians, and school experiences.

Adolescent↗
PubMed2006

An evaluation of cost sharing to finance a diet and physical activity intervention to prevent diabetes.

OBJECTIVE: The Diabetes Prevention Program (DPP) lifestyle intervention is a cost-effective strategy to prevent type 2 diabetes, but it is unclear how this intervention could be financed. We explored whether this intervention could be offered in a way that allows return on investment for private health insurers while remaining attractive for consumers, employers, and Medicare. RESEARCH DESIGN AND METHODS: We used the DPP and other published reports to build a Markov simulation model to estimate the lifetime progression of disease, costs, and quality of life for adults with impaired glucose tolerance. The model assumed a health-payer perspective and compared DPP lifestyle and placebo interventions. Primary outcomes included cumulative incidence of diabetes, direct medical costs, quality-adjusted life-years (QALYs), and cost per QALY gained. RESULTS: Compared with placebo, providing the lifestyle intervention at age 50 years could prevent 37% of new cases of diabetes before age 65, at a cost of $1,288 per QALY gained. A private payer could reimburse $655 (24%) of the $2,715 in total discounted intervention costs during the first 3 intervention years and still recover all of these costs in the form of medical costs avoided. If Medicare paid up to $2,136 in intervention costs over the 15-year period before participants reached age 65, it could recover those costs in the form of future medical costs avoided beginning at age 65. CONCLUSIONS: Cost-sharing strategies to offer the DPP lifestyle intervention for eligible people between ages 50 and 64 could provide financial return on investment for private payers and long-term benefits for Medicare.

Aged↗
PubMed2005

Preconception care in managed care: the translating research into action for diabetes study.

OBJECTIVES: This study was undertaken to examine the rates of preconception counseling in managed care for women with diabetes and associated patient and physician characteristics. STUDY DESIGN: Participants included women aged 18 to 45 years enrolled in a study of diabetes care in managed care. Women were asked if they recalled discussions regarding glucose control before conception (n = 236) and use of family planning until glucose control was achieved (n = 227). Hierarchical logistic regression models accounted for patient and physician characteristics. RESULTS: Fifty-two percent of women recalled being counseled about glucose control and 37% recalled family planning advice. In adjusted models, patient age (years) (odds ratio [OR] 0.91, 95% CI 0.86-0.96) and body mass index (BMI) (kg/m2) (OR 0.96, 95% CI 0.93-0.99) remained significant predictors of glucose control counseling. Similarly, patient age (years) (OR 0.94, 95% CI 0.89-0.99) and BMI (kg/m2) (0.96, 95% CI 0.93-0.99) remained significant predictors of family planning counseling. CONCLUSIONS: Preconception counseling rates for diabetic women are low and associated with younger age and lower BMI.

Adolescent↗
PubMed2005

Depression symptoms and antidepressant medicine use in Diabetes Prevention Program participants.

OBJECTIVE: To assess depression markers (symptoms and antidepressant medicine use) in Diabetes Prevention Program (DPP) participants and to determine whether changes in depression markers during the course of the study were associated with treatment arm, weight change, physical activity level, or participant demographic characteristics. RESEARCH DESIGN AND METHODS: DPP participants (n = 3,187) in three treatment arms (intensive lifestyle, metformin, and placebo) completed the Beck Depression Inventory (BDI) and reported on use of antidepressant medicines at randomization and subsequently at each annual visit (average duration in study 3.2 years). RESULTS: On study entry, 10.3% of participants had BDI scores > or =11, which was used as a threshold for mild depression, 5.7% took antidepressant medicines, and 0.9% had both depression markers. During the DPP, the proportion of participants with elevated BDI scores declined (from 10.3% at baseline to 8.4% at year 3), while the proportion taking antidepressant medicines increased (from 5.7% at baseline to 8.7% at year 3), leaving the proportion with either marker unchanged. These time trends were not significantly associated with the DPP treatment arm. Depression markers throughout the study were associated with some participant demographic factors, adjusted for other factors. Men were less likely to have elevated depression scores and less likely to use antidepressant medicine at baseline (9.0% of men and 17.9% of women had at least one marker of depression) and throughout the study (P <0.0001). Those with more education were less likely to have elevated symptom scores (P = 0.0007) but more likely to be taking antidepressant medicine (P = 0.002). Non-Hispanic white participants were less likely than African Americans to have BDI scores > or =11 (P = 0.03), but white participants were more likely to be taking antidepressant medicine than any other racial/ethnic group (P <0.0001). CONCLUSIONS: DPP participation was not associated with changes in levels of depression. Countervailing trends in the proportion of DPP participants with elevated depression symptoms and the proportion taking antidepressant medicine resulted in no significant change in the proportion with either marker. The finding that those taking antidepressant medicine often do not have elevated depression symptoms indicates the value of assessing both markers when estimating overall depression rates.

Adult↗
PubMed2005

Is physician gender associated with the quality of diabetes care?

OBJECTIVE: This study examines the association between physician gender and diabetes quality of care. RESEARCH DESIGN AND METHODS: We examined the association between the gender of primary care physicians (n = 1,686) and the quality of diabetes care they provided to their patients participating in the Translating Research Into Action for Diabetes (TRIAD) study. Main outcome measures were diabetes processes of care including receipt of dilated retinal exams, urine microalbumin/protein testing, foot exams, lipid and HbA(1c) (A1C) testing, recommendation to take aspirin, and influenza vaccination over 1 year. Intermediate outcomes included blood pressure, A1C, LDL levels, and patient satisfaction. Hierarchical regression models accounted for clustering within provider groups and health plans and adjusted for patient age, gender, race, income, education, diabetes treatment and duration, and health status, along with physician age, years of practice, and specialty. RESULTS: Compared with male physicians (n = 1,213), female physicians (n = 473) were younger, had more recently completed training, and were more often internists. Patients of female physicians (n = 4,585) were more often women and younger than patients of male physicians (n = 1,783). In adjusted analyses, patients of female physicians were slightly more likely to receive lipid measurements (predicted probability 1.09 [95% CI 1.02-1.15]) and A1C measurements (1.02 [1.00-1.05]) and were slightly more likely to have an LDL <130 mg/dl (1.05 [1.00-1.10]). CONCLUSIONS: Patients of female physicians received similar quality of care compared with patients of male physicians.

Adult↗
PubMed2004

Diabetes care quality in the Veterans Affairs Health Care System and commercial managed care: the TRIAD study.

BACKGROUND: No studies have compared care in the Department of Veterans Affairs (VA) with that delivered in commercial managed care organizations, nor have studies focused in depth on care comparisons for chronic, outpatient conditions. OBJECTIVE: To compare the quality of diabetes care between patients in the VA system and those enrolled in commercial managed care organizations by using equivalent sampling and measurement methods. DESIGN: Cross-sectional patient survey with retrospective review of medical records. SETTING: 5 VA medical centers and 8 commercial managed care organizations in 5 matched geographic regions. PARTICIPANTS: 8205 diabetic patients: 1285 in the VA system and 6920 in commercial managed care. MEASUREMENTS: We compared scores on identically specified quality measures for 7 diabetes care processes and 3 diabetes intermediate outcomes and on 4 dimensions of satisfaction. Scores were expressed as the percentage of patients receiving indicated care and were adjusted for patients' demographic and health characteristics. RESULTS: Patients in the VA system had better scores than patients in commercial managed care on all process measures (for example, 93% vs. 83% for annual hemoglobin A1c; P = 0.006; 91% vs. 75% for annual eye examination; P < 0.001). Blood pressure control was poor in both groups (52% to 53% of persons had blood pressure < 140/90 mm Hg), but patients in the VA system had better control of low-density lipoprotein cholesterol and hemoglobin A1c (for example, 86% vs. 72% for low-density lipoprotein cholesterol level < 3.37 mmol/L [<130 mg/dL]; P = 0.002). Satisfaction was similar in the 2 groups. LIMITATIONS: Our results may not be generalizable to all regions or health plans, and some of the differences in performance could reflect differences in documentation. CONCLUSIONS: Diabetes processes of care and 2 of 3 intermediate outcomes were better for patients in the VA system than for patients in commercial managed care. However, both VA and commercial managed care had room for improvement, especially for blood pressure control.

Aged↗
PubMed2004

Managed care organization and the quality of diabetes care: the Translating Research Into Action for Diabetes (TRIAD) study.

OBJECTIVE: To examine the association between the organizational model and diabetes processes of care. RESEARCH DESIGN AND METHODS: We used data from the Translating Research into Action for Diabetes (TRIAD), a multicenter study of diabetes care in managed care, including 8354 patients with diabetes. We identified five model types: for-profit group/network, for-profit independent practice association (IPA), nonprofit group/network, nonprofit IPA, and nonprofit group/staff. Process measures included retinal, renal, foot, lipid, and HbA(1c) testing; aspirin recommendations; influenza vaccination; and a sum of these seven processes of care over 1 year. Hierarchical regression models were constructed for each process measure and accounted for clustering at the health plan and provider group levels and adjusted for participant age, sex, race, ethnicity, diabetes treatment and duration, education, income, health status, and survey language. RESULTS: Participant membership in the model types ranged from 9% in nonprofit IPA models to 38% in nonprofit group/staff models. Over 75% of participants received most of the processes of care, regardless of model type. However, among for-profit plans, group/network models provided on average more processes of care than IPA models (5.5 vs. 4.7, P < 0.0001), and group/network models generally increased the probability of receiving a process by >or=10 percentage points. Among nonprofit plans, no effect of model type was found. CONCLUSIONS: Among for-profit plans, group/network models provided better diabetes processes of care than IPA models. Although reasons are speculative, this may be due to the clinical infrastructure available in group models that is not available in IPA models.

Diabetes Mellitus↗
PubMed2004

Referral management and the care of patients with diabetes: the Translating Research Into Action for Diabetes (TRIAD) study.

OBJECTIVE: To examine the effect of referral management on diabetes care. STUDY DESIGN: Cross-sectional analysis. PATIENTS AND METHODS: Translating Research Into Action for Diabetes (TRIAD) is a multicenter study of managed care enrollees with diabetes. Prospective referral management was defined as "gatekeeping" and mandatory preauthorization from a utilization management office, and retrospective referral management as referral profiling and appropriateness reviews. Outcomes included dilated eye exam; self-reported visit to specialists; and perception of difficulty in getting referrals. Hierarchical models adjusted for clustering and patient age, gender, race, ethnicity, type and duration of diabetes treatment, education, income, health status, and comorbidity. RESULTS: Referral management was commonly used by health plans (55%) and provider groups (52%). In adjusted analyses, we found no association between any referral management strategies and any of the outcome measures. CONCLUSIONS: Referral management does not appear to have an impact on referrals or perception of referrals related to diabetes care.

Aged↗
PubMed2004

Diabetes prevention. A GAMEPLAN for success.

Diabetes prevalence is growing at epidemic proportions, and the greatest increase in number of cases is anticipated to be among older adults. The Diabetes Prevention Program (DPP) showed that diabetes can be prevented or delayed among people with pre-diabetes (impaired glucose tolerance, impaired fasting glucose, or both). The National Diabetes Education Program has developed tools adapted from the DPP that primary care providers can use to counsel middle-age and older patients on diabetes prevention.

Aged↗
PubMed2003

Out-of-pocket costs and diabetes preventive services: the Translating Research Into Action for Diabetes (TRIAD) study.

OBJECTIVE: Despite the increased shifting of health care costs to consumers, little is known about the impact of financial barriers on health care utilization. This study investigated the effect of out-of-pocket expenditures on the utilization of recommended diabetes preventive services. RESEARCH DESIGN AND METHODS: This was a survey-based observational study (2000-2001) in 10 managed care health plans and 68 provider groups across the U.S. serving approximately 180,000 patients with diabetes. From 11,922 diabetic survey respondents, we studied the occurrence of self-reported annual dilated eye exams and diabetes health education and among insulin users, daily self-monitoring of blood glucose (SMBG). Conditional probabilities were estimated for outcomes at each level of self-reported out-of-pocket expenditure by using hierarchical logistic regression models with random intercepts. RESULTS: Conditional probabilities of utilization (95% CI) varied by expenditure for dilated eye exam [no cost 78% (75-82), copay 79% (75-82), and full price 70% (64-75); P < 0.0001]; diabetes health education [no cost 29% (23-36), copay 29% (23-36), and full price 19% (14-25); P < 0.0001]; and daily SMBG [no cost 75% (68-81), copay 68% (60-75), and full price 59% (49-68); P < 0.0001]. Extensive adjustment for patient factors had no discernible effect on the estimates or their significance, and cost-utilization relationships were similar across income levels and other patient characteristics. CONCLUSIONS: Benefit packages structured to derive greater fiscal contribution from the health plan membership result in suboptimal use of diabetes preventive services and may thus lead to poorer clinical outcomes, greater future costs, and lower health plan quality ratings.

Adolescent↗
PubMed2002

Effectiveness of pharmacist care for patients with reactive airways disease: a randomized controlled trial.

CONTEXT: It is not known whether patient outcomes are enhanced by effective pharmacist-patient interactions. OBJECTIVE: To assess the effectiveness of a pharmaceutical care program for patients with asthma or chronic obstructive pulmonary disease (COPD). DESIGN, SETTING, AND PARTICIPANTS: Randomized controlled trial conducted at 36 community drugstores in Indianapolis, Ind. We enrolled 1113 participants with active COPD or asthma from July 1998 to December 1999. Outcomes were assessed in 947 (85.1%) participants at 6 months and 898 (80.7%) at 12 months. INTERVENTIONS: The pharmaceutical care program (n = 447) provided pharmacists with recent patient-specific clinical data (peak expiratory flow rates [PEFRs], emergency department [ED] visits, hospitalizations, and medication compliance), training, customized patient educational materials, and resources to facilitate program implementation. The PEFR monitoring control group (n = 363) received a peak flow meter, instructions about its use, and monthly calls to elicit PEFRs. However, PEFR data were not provided to the pharmacist. Patients in the usual care group (n = 303) received neither peak flow meters nor instructions in their use; during monthly telephone interviews, PEFR rates were not elicited. Pharmacists in both control groups had a training session but received no components of the pharmaceutical care intervention. MAIN OUTCOME MEASURES: Peak expiratory flow rates, breathing-related ED or hospital visits, health-related quality of life (HRQOL), medication compliance, and patient satisfaction. RESULTS: At 12 months, patients receiving pharmaceutical care had significantly higher peak flow rates than the usual care group (P =.02) but not than PEFR monitoring controls (P =.28). There were no significant between-group differences in medication compliance or HRQOL. Asthma patients receiving pharmaceutical care had significantly more breathing-related ED or hospital visits than the usual care group (odds ratio, 2.16; 95% confidence interval, 1.76-2.63; P<.001). Patients receiving pharmaceutical care were more satisfied with their pharmacist than the usual care group (P =.03) and the PEFR monitoring group (P =.001) and were more satisfied with their health care than the usual care group at 6 months only (P =.01). Despite ample opportunities to implement the program, pharmacists accessed patient-specific data only about half of the time and documented actions about half of the time that records were accessed. CONCLUSIONS: This pharmaceutical care program increased patients' PEFRs compared with usual care but provided little benefit compared with peak flow monitoring alone. Pharmaceutical care increased patient satisfaction but also increased the amount of breathing-related medical care sought.

Adult↗
PubMed2002

The Diabetes Prevention Program: recruitment methods and results.

The Diabetes Prevention Program (DPP) is a multicenter randomized controlled trial designed to test whether diet and exercise or medication can prevent or delay the onset of type 2 diabetes in persons with impaired glucose tolerance, who are at increased risk of the disease. This paper describes DPP recruitment methods, strategies, performance, and costs. The DPP developed an organizational structure for comprehensive management and continuous monitoring of recruitment efforts. The DPP utilized a variety of recruitment strategies, alone or in combination, and a stepped informed consent procedure leading to randomization. Studywide and clinic-specific recruitment data were monitored, analyzed, and used to modify recruitment approaches. DPP recruitment was completed slightly ahead of schedule, meeting goals for the proportion of women enrolled and nearly meeting goals for the proportion of racial/ethnic minorities. Clinics varied widely in the recruitment strategies they used, and these strategies also varied by participant age, gender, and race/ethnicity. Staff time devoted to recruitment averaged 86.8 hours per week per clinic, with the majority of effort by staff specifically assigned to recruitment. The number of staff hours required to recruit a participant varied by recruitment strategy. Recruitment cost (excluding staff cost) was about 1075 US dollars per randomized participant. The DPP experience offers lessons for those planning similar efforts: (1) a method for ongoing assessment and revision of recruitment strategies is valuable; (2) a range of recruitment strategies may be useful; (3) the most effective methods for recruiting potential subjects may vary according to the gender, age, and race/ethnicity of those individuals; (4) recruitment strategies vary in the amount of staff time required to randomize a participant; and (5) a stepped screening may make it easier to identify and recruit volunteers who understand the requirements of the study.

Adult↗
PubMed2002

Issues in conducting randomized controlled trials of health services research interventions in nonacademic practice settings: the case of retail pharmacies.

OBJECTIVE: To describe unexpected challenges and strategies to overcome them when conducting randomized controlled trials (RCT) of health services research interventions in retail pharmacies. STUDY SETTING: Thirty-six retail drug stores in Indianapolis. STUDY DESIGN: We conducted an RCT to evaluate the effectiveness of an intervention to increase pharmacists' involvement in caring for customers. We describe: (1) our RCT as originally designed, (2) unexpected challenges we faced; and (3) how we resolved those challenges. DATA COLLECTION/EXTRACTION METHODS: Randomized controlled trial. PRINCIPAL FINDINGS: Major modifications in research design were necessitated by factors such as corporate restructuring, heightened sensitivity to patient confidentiality, and difficulties altering employees' behavior. We overcame these barriers by conducting research that is consistent with corporate goals, involving appropriate corporate administrators and technical personnel early in the process, and being flexible. CONCLUSIONS: Health services researchers should conduct RCTs in a variety of non-academic practice settings to increase generalizability and better reflect the true impact of interventions. Pragmatic problems, although significant, can be successfully overcome.

Adolescent↗
PubMed2002

Impact of a program to improve adherence to diabetes guidelines by primary care physicians.

OBJECTIVES: Previous studies have shown that primary care physician (PCP) adherence to diabetes guidelines is suboptimal. We sought to determine the state of diabetes care given by independently practicing PCPs in a rural county in Indiana and whether a multifaceted intervention targeting PCPs, patients, and the health care system would improve adherence to diabetes guidelines. RESEARCH DESIGN AND METHODS: Baseline audits to assess adherence to diabetes guidelines were done on charts of the seven PCPs in the county. Audits were repeated after development of local consensus guidelines and feedback of baseline performance and after implementation of various interventions (practice aids, physician detailing, patient education sessions, and implementation of computerized individual meal planning). RESULTS: Before any intervention, rates of adherence to guidelines were low (15% for foot exams, 20% for HbA(1c) measurement, 23% for eye exam referrals, 33% for urine protein screening, 44% for lipid profiles, 73% for home glucose monitoring, and 78% for blood pressure measurements). One year after development of local consensus guidelines and feedback of baseline performance, significant improvements were seen in blood pressure measurements (71 vs. 83%; P = 0.002), foot exams (19 vs. 42%; P < 0.001), HbA(1c) measurements (26 vs. 37%; P = 0.012), and PCP eye exams (38 vs. 46%; P = 0.043); a trend toward improvement was seen in referral to eye specialists (25 vs. 33%; P = 0.059). After a second year of multiple interventions, only blood pressure measurements (70 vs. 92%; P < 0.001) and foot exams (22 vs. 47%; P < 0.001) remained significantly improved; all other areas returned to rates indistinguishable from baseline. CONCLUSIONS: In busy primary care practices lacking organizational support and computerized tracking systems, sustained improvements in diabetes care are difficult to attain using traditional physician-targeted approaches.

Blood Pressure↗