D Provenzale

University of Alabama at Birmingham, Birmingham, Alabama, United States

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Publications (30)215.99 Total impact

  • M A Eloubeidi, D Provenzale
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    ABSTRACT: The subgroup of patients with gastroesophageal reflux disease (GERD) that should undergo endoscopy to rule out Barrett's esophagus (BE) has not been well defined. To examine demographic and clinical variables predictive of BE before endoscopy. A validated GERD questionnaire was administered to 107 patients with biopsy-proven BE and to 104 patients with GERD but no BE shown by endoscopy. Frequent symptoms were defined as symptoms that occurred at least once or more each week. Severity of symptoms was rated on a scale from 1 to 4 (mild to very severe). Univariate analysis and multivariable logistic regression were performed to determine whether demographic characteristics and the duration, severity, and frequency of GERD symptoms were associated with the identification of BE. Eighty-five percent of the GERD patients and 82% of the BE patients completed the questionnaire. There was no difference between the groups in terms of race, gender, or proton pump inhibitor use. The BE patients were older (median age, 64 vs. 57 years, p = 0.04). In multivariable logistic regression, an age of more than 40 years ( p = 0.008), the presence of heartburn or acid regurgitation ( p = 0.03), and heartburn more than once a week ( p = 0.007) were all independent predictors of the presence of BE. Interestingly, patients with BE were less likely to report severe GERD symptoms ( p = 0.0008) and nocturnal symptoms ( p = 0.03). Duration of symptoms, race, alcohol, and smoking history were not associated with BE. Upper endoscopy should be performed in GERD patients more than 40 years of age who report heartburn once or more per week. The severity of symptoms and the presence of nocturnal symptoms are not reliable indicators of the presence of BE.
    Journal of Clinical Gastroenterology 11/2001; 33(4):306-9. · 3.20 Impact Factor
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    ABSTRACT: The ileal pouch anal anastomosis is a safe and effective procedure but is also associated with pouchitis, small bowel obstruction, and incontinence. We prospectively evaluated the health-related quality of life using generic and disease-specific measures in a cohort of patients with ulcerative colitis undergoing ileal pouch anal anastomosis. Health-related quality of life measures included the Time Trade-off, Rating Form of IBD Patient Concerns, and the Short-Form 36. Assessments occurred preoperatively and 1, 6, and 12 months postoperatively. Time Trade-off scores had significantly improved at the 1-month postoperative assessment and approached perfect health at the 12-month postoperative assessment. The Rating Form of IBD Patient Concerns revealed a significant reduction in patient concerns at 1 month, and this difference persisted at 6 and 12 months. Seven of the eight subscales of the Short-Form 36 revealed improved health-related quality of life postoperatively. Health-related quality of life improved after ileal pouch anal anastomosis when assessed with both generic and disease-specific measures. Improvements were observed as early as 1 month postoperatively. These results may guide patients and physicians as they consider and prepare for the impact of ileal pouch anal anastomosis.
    The American Journal of Gastroenterology 06/2001; 96(5):1480-5. · 7.55 Impact Factor
  • M A Eloubeidi, S B Wade, D Provenzale
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    ABSTRACT: Many abstracts submitted to annual scientific meetings never come to full publication in peer-reviewed journals. The objective of this study was to determine factors associated with the fate of endoscopic research abstracts submitted to the annual scientific meeting of the American Society for Gastrointestinal Endoscopy (ASGE). All abstracts (n = 461) submitted to the annual meeting of the ASGE in May of 1994 were retrospectively reviewed. The following databases were searched for evidence of publication of abstracts in full-manuscript form: Medline, HealthSTAR, Current Contents, CINHAL, and Cancerlit. All abstracts were reviewed between May 4, 1998 and June 30, 1998. Univariate and multivariate analysis were performed to determine the association between abstract characteristics and acceptance for presentation at the meeting and for publication. Fifty-five percent (247/451) of submitted abstracts were accepted for presentation. In univariate analysis, pediatric studies, prospective studies, randomized studies, and studies from university-affiliated medical centers (UAMC), were more likely to be accepted for presentation (p < 0.05). In multivariate analysis, the variables: pediatric studies (p = 0.01), prospective studies (p = 0.005), randomized studies (p = 0.06), and studies from UAMC (p = 0.01) predicted acceptance of abstracts for presentation at the meeting. The overall publication rate was 25.1%. The publication rates 1, 2, 3, and 4 years after the meeting were 6.7%, 16.2%, 22.8%, and 25.1%, respectively. Multivariate Cox proportional hazards analysis showed that accepted abstracts (p = 0.0003) studies reporting positive results (p = 0.0015), and studies from outside the United States (p = 0.036) were more likely to be published in manuscript form. The overall publication rate of abstracts reporting endoscopic research is 25%, lower than that in any published report from other medical societies. Abstracts from the United States were less likely to be published in full-manuscript form. Although there was no positive outcome bias for acceptance of abstracts for presentation at the meeting, there was bias toward publication of statistically significant results. Further investigations are warranted to determine the variation in the publication of research results according to country of origin and to determine factors that hinder publication of GI endoscopic research in manuscript form.
    Gastrointestinal Endoscopy 04/2001; 53(3):275-82. · 5.21 Impact Factor
  • D Provenzale, J Onken
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    ABSTRACT: This review article on the surveillance of patients with ulcerative colitis provides an overview of the criteria for evaluating screening and surveillance programs and applies the criteria to the available evidence to determine the effectiveness of the surveillance of patients with ulcerative colitis. We examine the clinical outcomes associated with surveillance, the additional clinical time required to confirm the diagnosis of dysplasia and cancer, compliance with surveillance and follow-up, and the effectiveness of the individual components of a surveillance program, including colonoscopy and pathologist's interpretation. The disability associated with colectomy is considered, as are the cost and acceptability of surveillance programs. Patients with long-standing ulcerative colitis are at risk for developing colorectal cancer. Recommended surveillance colonoscopy should be supported. New endoscopic and histopathologic techniques to improve the identification of high-risk patients may enhance the effectiveness and cost-effectiveness of surveillance practices.
    Journal of Clinical Gastroenterology 03/2001; 32(2):99-105. · 3.20 Impact Factor
  • Source
    J B O'Connor, D Provenzale, S Brazer
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    ABSTRACT: Gastroesophageal reflux disease is a common problem. Most patients with erosive GERD require long-term treatment, without which relapse is common. The cost of ongoing medical care for GERD is substantial, and patients with symptomatic GERD have impaired quality of life. Treatment strategies for GERD should aim to improve patient outcome at a reasonable cost. Cost-effectiveness methodology facilitates the integration of costs and patient outcomes, enabling the clinician to choose the most cost-effective therapy in a variety of clinical circumstances. The published studies reviewed in this paper show that proton pump inhibitors are the most cost-effective initial and maintenance medical therapy for GERD under most circumstances. However, variations in drug acquisition costs, such as may occur in managed care practice settings, may lead to H2-receptor antagonists being preferred under some circumstances. In the long-term management of GERD, laparoscopic surgery is effective, but its high initial cost makes it less cost-effective than proton pump inhibitors in the early treatment years. Also, recent data suggest that the long-term morbidity is higher than previously suspected. Finally, appropriate application of cost-effectiveness analyses to clinical practice requires critical appraisal of model design and the perspective adopted. The purpose of this article is to describe the interpretation and application of the results of cost-effectiveness analyses in clinical practice, and to examine the published literature on the cost-effectiveness of treatment options for GERD.
    The American Journal of Gastroenterology 01/2001; 95(12):3356-64. · 7.55 Impact Factor
  • W S Yancy, D Provenzale, E C Westman
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    ABSTRACT: The 5 individuals described in these case reports experienced resolution of GERD symptoms after self-initiation of a low-carbohydrate diet. Their observations suggest that carbohydrate restriction may have contributed to their symptom relief. However, this conclusion is confounded by concurrent reduction of caffeine intake in 3 of the individuals and reduction of acidic and high-osmolal food intake in all of them. Observations from some of these individuals suggest that carbohydrates may be a precipitating factor for GERD symptoms and that other classic exacerbating foods such as coffee and fat may be less pertinent when a low-carbohydrate diet is followed. However, these conclusions are preliminary. These findings primarily suggest that prospective research should be performed on the effect of low-carbohydrate diets on GERD symptoms. Trials that control for all of the confounders mentioned above and that contain objective endpoints are needed to further investigate these issues.
    Alternative therapies in health and medicine 01/2001; 7(6):120, 116-9. · 1.77 Impact Factor
  • M A Eloubeidi, D Provenzale
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    ABSTRACT: The aims of this study were: 1) to compare the health-related quality of life (HRQL) of patients with Barrett's esophagus (BE) to that of patients with GERD who did not have BE; 2) to compare HRQL of gastroesophageal reflux disease (GERD) patients to that of normative data for the US general population; and 3) to examine the impact of GERD symptom frequency and severity on HRQL. The SF-36 and a validated GERD questionnaire were administered to 107 patients with biopsy-proven BE and to 104 patients with GERD but no BE by endoscopy. Frequent symptoms were defined as symptoms that occurred at least once weekly. Severity of symptoms was rated on a scale from 1 to 4 (mild to very severe). In all, 85% of the GERD patients and 82% of BE patients completed the questionnaires. There was no difference in the scores of the eight subscales of the SF-36 between BE patients and those with GERD but without BE (p > 0.05). However, both groups scored below average on all subscales of the SF-36 compared to published US norms for an age- and gender-matched group. Using multivariable linear regression, the social functioning subscale of the SF-36 correlated with the presence of heartburn or acid regurgitation, severity of acid regurgitation, frequency of heartburn, frequency of acid regurgitation, and number of comorbidities. Similarly, the physical functioning subscale correlated with age, frequency of heartburn, and number of comorbidities. The bodily pain subscale correlated with the frequency of heartburn and number of comorbidities. The bodily pain subscale correlated with the frequency of heartburn and the severity of dysphagia, whereas the role emotional subscale correlated with the frequency of heartburn and the presence of dysphagia. Although there were no differences in HRQL between BE and GERD patients, both groups scored below average on the subscales of the SF-36 compared to normal controls. GERD symptom frequency and severity were associated with bodily pain and with impaired social, emotional, and physical functioning, suggesting a profound impact on daily living.
    The American Journal of Gastroenterology 08/2000; 95(8):1881-7. · 7.55 Impact Factor
  • F A Sloan, C J Conover, D Provenzale
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    ABSTRACT: The purpose of this study was to evaluate the impact of hospital credentialing standards on surgical outcomes for selected procedures. The study used hospital credentialing practices from a 1996 survey of North Carolina community hospitals, with surgical outcomes derived from a statewide database of inpatient surgical discharges in 1995. Hospital mortality, complications and elevated lengths of stay were used as outcome indicators in an analysis of 6 surgical procedures. Multivariate logit analysis was used to calculate the effects of hospital credentialing stringency and nine credentialing practices on outcomes, controlling for patient demographic characteristics, type of admission, severity of illness and hospital characteristics. Teaching hospitals adopted more stringent credentialing practices, with almost no difference between metropolitan and nonmetropolitan nonteaching facilities in their use of various credentialing policies. Surgical outcomes typically were not related to stringency of the hospital credentialing environment. Generally, the effect of specific practices was inconsistent (associated with improved outcomes for certain procedures and significantly worse outcomes for others) or counterintuitive (showing worse outcomes for selected surgical procedures where effects were statistically significant). More stringent hospital credentialing does not appear likely to improve patient outcomes.
    Social Science [?] Medicine 02/2000; 50(1):77-88. · 2.73 Impact Factor
  • J A Dominitz, D Provenzale
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    ABSTRACT: Medications used to treat gastrointestinal symptoms account for a substantial share of pharmacy expenses for veterans affairs medical centers. Prior studies have shown that the prevalence of peptic ulcer disease is higher in veterans than in nonveterans. Our aim was to determine the prevalence of upper gastrointestinal symptoms among patients seeking health care in the Department of Veterans Affairs outpatient clinics. A total of 1582 veterans completed a previously validated bowel symptom questionnaire in the following clinics: gastroenterology (n = 693), walk-in (n = 403), general medicine (n = 379), and women's health (n = 107). Overall response was 78%. Dyspepsia was reported in 30%, 37%, 44%, and 53% of patients in general medicine, walk-in, women's health, and gastroenterology clinics, respectively. Heartburn, at least weekly, was reported in 21%, 21%, 28%, and 40% of patients in general medicine, walk-in, women's health, and gastroenterology clinics, respectively. Prior peptic ulcer disease (PUD) was reported in 29%, 26%, 22%, and 44% of patients in general medicine, walk-in, women's health, and gastroenterology clinics, respectively. Dyspepsia, heartburn, and PUD were significantly associated with increased physician visits and lower general health. Dyspepsia and heartburn are common symptoms among veterans. Lifetime prevalence of PUD is high among veterans. Gastrointestinal symptoms have a significant impact on health care utilization and general health. These prevalence estimates provide a basis for studies of resource utilization and for cost-effectiveness analyses of the treatment of gastrointestinal disorders in the veteran population. Moreover, the high prevalence of symptoms helps to explain the high utilization of gastrointestinal medications.
    The American Journal of Gastroenterology 09/1999; 94(8):2086-93. · 7.55 Impact Factor
  • G M Eisen, G R Locke, D Provenzale
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    ABSTRACT: The evolution of health care has required physicians to evaluate more critically the impact of interventions on their patients' well-being. Prior clinical interventions focused primarily on biochemical and histological endpoints. These outcomes frequently were tenuously linked to patient benefit. Recently there has been a movement toward patient-oriented outcomes, including health-related quality of life (HRQL). The medical literature now frequently describes the effects of therapies on HRQL. Gastroenterologists need to understand the concepts behind HRQL and the use and utility of the various instruments employed to measure this outcome. The purpose of this article is: 1) to define the concept of health-related quality of life (HRQL); 2) to assess when measurement of HRQL can guide clinical decision-making; 3) to describe the desired properties of an HRQL instrument; and 4) to distinguish types of HRQL instruments. We discuss the varied definitions of HRQL and the clinical scenarios in which they are important. The psychometric properties of HRQL instruments, including validity, reliability, responsiveness, sensitivity, and coverage are defined and discussed. The types of instruments such as health profile, time trade-off, and standard gamble are contrasted. Finally, we compare generic and disease-specific instruments regarding their uses, strengths, and weaknesses. HRQL reflects patients' perceptions of disease and its impact on health status. It is becoming an increasingly important endpoint in therapeutic trials. By understanding its components and how it can meaningfully be measured, gastroenterologists may be better able to optimize the benefit patients receive from their medical interventions.
    The American Journal of Gastroenterology 09/1999; 94(8):2017-21. · 7.55 Impact Factor
  • Source
    D Provenzale, C Schmitt, J B Wong
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    ABSTRACT: Surveillance of Barrett's patients is recommended, to detect dysplasia and early cancer. The reported risk for developing cancer varies substantially, however. Our previous analysis used an average cancer incidence of 1/75 patient-years (PY). Recent reports suggest that the risk may range from 1/251 to 1/208 PY in combined series of patients with long segment Barrett's esophagus (LSBE, >3 cm), and short segment Barrett's esophagus (SSBE), and up to 1% annually in patients with SSBE. Our goal was to consider these new estimates of cancer risk in a cost-utility analysis of surveillance of patients with Barrett's esophagus. Using our previously published model, we incorporated an average of the recent estimates of cancer risk (0.4% annually, 1/227 PY), and our primary data on quality of life after esophagectomy. We included actual variable (direct) costs and used a discount rate of 5%. From the perspective of an HMO, the model evaluates surveillance every 1-5 yr and no surveillance, with esophagectomy performed if high grade dysplasia is diagnosed, and calculates the incremental cost-utility ratios for each strategy. The results suggest that, at our baseline, annual cancer risk surveillance every 5 yr is the only viable strategy. More frequent surveillance costs more and yields a lower life expectancy. The incremental cost-utility ratio for surveillance every 5 yr is $98,000/quality-adjusted life year (QALY) gained, comparable to the incremental cost-effectiveness ratios of accepted practices (heart transplantation and screening for tuberculosis in selected populations, $160,000/LY gained and $216,000/LY gained, respectively). Surveillance of Barrett's patients should extend life, with incremental cost-utility ratios that compare favorably with some accepted medical practices. Policy makers can compare the cost of surveillance to that of other accepted practices to determine their willingness to fund surveillance.
    The American Journal of Gastroenterology 09/1999; 94(8):2043-53. · 7.55 Impact Factor
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    ABSTRACT: Although Barrett's esophagus (BE) may be associated with severe gastroesophageal reflux disease (GERD), there are currently no studies that evaluate resource utilization in Barrett's patients. The aims of this study were 1) to determine the cost and number of endoscopies and clinic visits to the GI clinic for GERD or its complications in patients with BE; 2) to determine the pattern and cost of medication use in patients with BE; and 3) to compare medication use by patients with BE to that of patients with insulin-requiring diabetes mellitus (DM). Using the cost distribution report data and the pharmacy acquisition costs from the Durham VAMC, we calculated the monthly cost of endoscopies, clinic visits related to GERD, and medication use in 53 patients with BE between 1/1/94 and 1/1/97. We also calculated the average cost of medication use for 55 patients with insulin-requiring DM. All patients with BE were male. Their median age was 64.0 yr (IQR 57-68). Of them, 92% were white; 23% had low-grade dysplasia (LGD). Patients with LGD were more likely to have more than three endoscopies in 3 yr than were those with no LGD (OR 6.3, 95% CI 1.11-35.67). There was no difference in clinic visits in the patients with and without dysplasia (OR 0.335, 95% CI 0.093-1.206). A total of 139 endoscopies and 172 clinic visits were observed. Outpatient care for patients with BE costs approximately $103/month or $1241/yr. Endoscopies and clinic visits accounted for 31.1% and 5.9% of the monthly medical cost, respectively. Medications accounted for 63% of the total cost of care. Prokinetic agents accounted for 0.8% of the total cost of medications, whereas histamine receptor antagonists (H2 blockers) and proton pump inhibitors (PPIs) accounted for 34.6% and 64.6%, respectively. Medication cost per month in patients with BE was approximately $65, similar to that of patients with insulin-requiring DM ($63). Our conclusions were as follows: 1) Outpatient care for patients with BE costs approximately $1241/yr or ($103/month). 2) Medication use per month accounted for more than half of the total cost; PPIs accounted for 64.6% of total medication cost, suggesting that reflux was severe. 3) Consistent with current surveillance strategies, patients with LGD had more frequent endoscopy than patients with no dysplasia. 4) Medication cost per month in patients with BE is similar to that in patients with DM, another group with a chronic disorder. 5) Those who make health policy can use these results to compare the cost of care of patients with BE to the cost for those with other chronic medical disorders.
    The American Journal of Gastroenterology 09/1999; 94(8):2033-6. · 7.55 Impact Factor
  • D Provenzale
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    ABSTRACT: This is an era of rapid change in health care systems and clinical practice. In the face of increasing national health care expenditures, physicians are confronted with an increased demand to justify practices and to show the value of their services. Hepatologists are being required to show that their practices are both effective and cost-effective. This has led to an expanding body of literature examining the cost-effectiveness of medical practices. To evaluate these economic analyses the reader must be familiar with the concepts used in economic analysis and have a clear understanding of both how these analyses are performed and how the results can be applied to clinical practice. The purpose of this article is to provide the reader with the essential concepts for evaluating economic analyses in the medical literature and to provide published criteria for performing and critiquing an economic analysis. The terms used in economic analysis are outlined and defined. The criteria for performing an economic analysis are listed. Examples are given to emphasize the key points.
    Hepatology 07/1999; 29(6 Suppl):13S-17S. · 12.00 Impact Factor
  • M A Eloubeidi, D Provenzale
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    ABSTRACT: Few studies have evaluated the ability of the endoscopist to predict the presence of Barrett's esophagus (BE) at index endoscopy. The goals of this study were to determine the operating characteristics of endoscopy in diagnosing BE, and to determine the clinical and endoscopic predictors of BE in suspected BE patients at the index endoscopy. From September 1993 to October 1997, endoscopic reports were examined to identify patients with suspected BE. All esophageal pathology reports during the same period were evaluated for the presence of specialized intestinal metaplasia. During the study period, 4053 endoscopies were performed on 2393 patients. Eight percent of all procedures were performed for suspected or confirmed BE. Fifty-three patients were known to have BE and thus their reports were excluded from this analysis. Five hundred seventy of the remaining patients had esophageal biopsies performed, and were included in this analysis. Among these 570 patients, 146 were suspected to have BE on endoscopy, while 424 were not suspected to have BE at the time of endoscopy. There were no differences among the two groups in terms of gender, race, and dyspepsia as an indication for the endoscopy. However, suspected BE patients were slightly younger and were more likely to have heartburn, but were less likely to have dysphagia as an indication for the endoscopy. The sensitivity and specificity of the endoscopists' assessments were 82% (95% confidence interval [CI], 72-92) and 81% (95% CI, 78-84), respectively. The positive predictive value and the negative predictive value were 34% and 97%, respectively. The positive likelihood ratio was 4.32 (95% CI, 3.49-5.31) and the negative likelihood ratio was 0.22 (95% CI, 0.13-0.38). Univariate analysis showed that endoscopists diagnosed BE in those with long-segment BE (LSBE) more accurately than in those with short-segment BE (SSBE) (55% vs 25% p = 0.001; odds ratio [OR] = 3.63, 95% CI, 1.71-7.70). Barrett's esophagus was correctly diagnosed in 38.5% of white patients but in only 14.7% of black patients (p = 0.01; OR = 3.63, 95% CI, 1.31-10.13). Multivariable logistic regression identified only the length of the columnar-appearing segment (p = 0.002; OR = 3.33, 95% CI, 1.54-7.17) and race (p = 0.08; OR = 2.31, 95% CI, 0.88-6.03) to be associated with the presence of BE on biopsy. Barrett's esophagus is frequently suspected at endoscopy; SSBE was more frequently suspected than LSBE, but was correctly diagnosed only 25% of the time, versus 55% for LSBE. Endoscopists diagnosed BE with a sensitivity of 82% and a specificity of 81%. However, the positive predictive value was only 34%, whereas the negative predictive value was 97%. The length of the columnar-appearing segment is the strongest predictor of BE at endoscopy. Alternative methods are needed to better identify BE patients endoscopically, especially those with SSBE.
    The American Journal of Gastroenterology 05/1999; 94(4):937-43. · 7.55 Impact Factor
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    ABSTRACT: The aim of this study was to assess the influence of race on the treatment and survival of patients with colorectal carcinoma. This retrospective cohort study included all white or black male veterans given a new diagnosis of colorectal carcinoma in 1989 at Veterans Affairs Medical Centers nationwide. After adjusting for patient demographics, comorbidity, distant metastases, and tumor location, the authors determined the likelihood of surgical resection, chemotherapy, radiation therapy, and death in each case. Of the 3176 veterans identified, 569 (17.9%) were black. Bivariate analyses and logistic regression revealed no significant differences in the proportions of patients undergoing surgical resection (70% vs. 73%, odds ratio 0.92, 95% confidence interval 0.74-1.15), chemotherapy (23% vs. 23%, odds ratio 0.99, 95% confidence interval 0.78-1.24), or radiation therapy (17% vs. 16%, odds ratio 1.10, 95% confidence interval 0.85-1.43) for black versus white patients. Five-year relative survival rates were similar for black and white patients (42% vs. 39%, respectively; P=0.16), though the adjusted mortality risk ratio was modestly increased (risk ratio 1.13, 95% confidence interval 1.01-1.28). Overall, race was not associated with the use of surgery, chemotherapy, or radiation therapy in the treatment of colorectal carcinoma among veterans seeking health care at Veterans Affairs Medical Centers. Although mortality from all causes was higher among black veterans with colorectal carcinoma, this finding may be attributed to underlying racial differences associated with survival. This study suggests that when there is equal access to care, there are no differences with regard to race.
    Cancer 07/1998; 82(12):2312-20. · 5.20 Impact Factor
  • D Provenzale, J B Wong, J E Onken, J Lipscomb
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    ABSTRACT: To illustrate the principles of cost-effectiveness analysis, this third article in the "Primer on Economic Analysis for the Gastroenterologist" applies published criteria for appraising an economic analysis to a study of the cost-effectiveness of surveillance of patients with ulcerative colitis. We review and apply the 10 standard criteria for critical appraisal and evaluation of cost-effectiveness analyses. We outlined the development and critique of a decision analytic model that examines the cost-effectiveness of surveillance of patients with ulcerative colitis, and we compared the cost-effectiveness of surveillance of patients with ulcerative colitis to other well-accepted medical practices.
    The American Journal of Gastroenterology 07/1998; 93(6):872-80. · 7.55 Impact Factor
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    ABSTRACT: Using clinical practice guidelines, a registered nurse adjusted antireflux medications, evaluated esophageal biopsy reports, determined the interval between surveillance endoscopies, and provided education for patients with Barrett's esophagus. No previous reports have assessed the effectiveness or patient satisfaction associated with registered nurse-provided primary care. Because estimates of the incidence of dysplasia and adenocarcinoma vary widely, we also prospectively followed a cohort of patients with Barrett's esophagus. Charts were reviewed to determine the frequency of variation from guidelines, the annual incidence of dysplasia and adenocarcinoma, and frequency of reflux symptoms. Patients were mailed a questionnaire to assess satisfaction with their medical care and with the nurse. Variation by the nurse from the guidelines on surveillance endoscopy (1.9%) and the treatment of reflux (1.3%) was rare. Most patients were very satisfied (score of 6 on 0-6-point Likert scale) with overall medical care (88%), and patient education (76%), and most patients did not think that increased physician involvement would improve their care (93%). Ninety-seven percent of patients had control of reflux symptoms. Two patients with long segment Barrett's esophagus (n = 67) developed high grade dysplasia over 323 patient-yr of follow-up (1 of 162 patient-yr for an annual incidence of 0.6%). No patients with short segment Barrett's esophagus (n = 56) developed high grade dysplasia or adenocarcinoma over 172 patient-years of follow-up. The registered nurse in our clinical setting effectively administered clinical practice guidelines for the management of Barrett's esophagus without clinically significant morbidity or patient dissatisfaction. Before these results can be generalized to other settings, further studies will need to be performed.
    The American Journal of Gastroenterology 07/1998; 93(6):906-10. · 7.55 Impact Factor
  • J A Dominitz, D Provenzale
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    ABSTRACT: The goal of this study was to describe the attitudes of patients toward colorectal cancer screening, colon cancer, and colostomy. Using the time trade-off technique, we interviewed four groups of patients at a veterans' hospital: 1) 46 patients with colorectal cancer, 2) 24 patients undergoing screening sigmoidoscopy, 3) 114 subjects participating in a screening colonoscopy study, and 4) 62 patients who have never undergone endoscopic screening for colorectal cancer. Using this technique, we measured quality of life for six scenarios pertaining to screening for colorectal cancer, the patient's current health, colorectal cancer, and colostomy. Unscreened patients were willing to give up significantly more time to avoid screening sigmoidoscopy and colonoscopy (median 91 days and 183 days, respectively) than were patients undergoing screening sigmoidoscopy (median 0 days and 7 days, respectively), screening colonoscopy (median 0 days and 0 days, respectively), or patients with colorectal cancer (median 0 days and 0 days, respectively). Cancer patients rated their current health state lower than volunteers for screening. Colon cancer and colostomy were rated similarly by all four groups. Substantial variation in patient attitudes was present in all groups. Patients are generally very accepting of endoscopic screening for colorectal cancer. However, decisions regarding recommendations for colorectal cancer screening must take into account the variability in patient preferences. Effective alternative strategies should be available for those whose preferences do not comply with standard recommendations. The effect of patient education and physician recommendations on subjects' attitudes toward screening warrants further investigation.
    The American Journal of Gastroenterology 01/1998; 92(12):2171-8. · 7.55 Impact Factor
  • Gastroenterology 01/1998; 114. · 12.82 Impact Factor
  • D. Provenzale, M. Shearin, J. E. Onken, J. B. Wong
    Gastroenterology 01/1998; 114. · 12.82 Impact Factor

Publication Stats

1k Citations
215.99 Total Impact Points


  • 2001
    • University of Alabama at Birmingham
      Birmingham, Alabama, United States
  • 1999–2001
    • North Carolina Clinical Research
      Raleigh, North Carolina, United States
    • University of Washington Seattle
      • Department of Medicine
      Seattle, WA, United States
    • The University of Memphis
      Memphis, Tennessee, United States
  • 1998–2000
    • Duke University
      • Department of Economics
      Durham, NC, United States
  • 1996–2000
    • Duke University Medical Center
      • Department of Medicine
      Durham, North Carolina, United States
  • 1995
    • University of Massachusetts Boston
      Boston, Massachusetts, United States
  • 1994–1995
    • Tufts University
      • Division of Gastroenterology
      Boston, GA, United States