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American Society of Clinical Oncology recommendations for the initial hormonal management of androgen-sensitive metastatic, recurrent, or progressive prostate cancer.

PURPOSE: To develop a clinical practice guideline for the management of men with metastatic, recurrent, or progressive carcinoma of the prostate. The focus of this document is on the use, combinations, and timing of various forms of androgen deprivation therapy (ADT) for the palliation of men with androgen-sensitive disease. METHODS: An expert panel and writing committee were formed. The questions to be addressed by the guideline were determined, and a systematic review of the literature was performed, which included a search of online databases, bibliographic review, and consultation with content experts. A priori criteria were used to select studies for analysis and study authors were contacted when necessary. RESULTS: There were 10 randomized controlled trials, six systematic reviews, and one Markov model available to inform the guidelines. CONCLUSION: A full discussion between practitioner and patient should occur to determine which therapy is best for the patient. Bilateral orchiectomy or luteinizing hormone releasing hormone agonists are the recommended initial treatments. Nonsteroidal antiandrogen therapy may be discussed as an alternative, but steroidal antiandrogens should not be offered as monotherapy. Patients willing to accept the increased toxicity of combined androgen blockage for a small benefit in survival should be offered nonsteroidal antiandrogen in addition to castrate therapy. Until data from studies using modern medical diagnostic/biochemical tests and standardized follow-up schedules become available, no specific recommendations can be issued regarding the question of early versus deferred ADT. A discussion about the pros and cons of early versus deferred ADT should occur.

Antineoplastic Agents, Hormonal↗

Epidemiologic evidence for a changing natural history of myasthenia gravis.

OBJECTIVE: To survey the epidemiologic literature for evidence of an increasing prevalence of myasthenia gravis (MG) over time, and to explore the reasons for the increase. DATA SOURCES: We found population-based reports of the epidemiology of MG by searching bibliographic databases. We used MG, epidemiology, prevalence, incidence, and mortality as search terms. STUDY SELECTION: We included population-based studies that reported the number of cases and the time period from which rates were calculated. STATISTICAL METHODS: We performed a regression analysis of rates versus date of study, comparing the slopes of regression lines for prevalence, incidence, and mortality. We performed a second analysis grouping rates by decade of study and calculating a mean rate weighted by the size of the population studied. We calculated 95% confidence intervals for each rate. RESULTS: We included 33 studies from 1950 through 1995. Prevalence and incidence rates increased over time, but the regression line for prevalence significantly exceeded that for incidence. Mortality rates declined slightly. The weighted means for prevalence rose significantly, but there was no significant change in incidence or mortality. CONCLUSION: The prevalence of MG has increased over the past forty-five years, probably because patients with the disease have longer life spans owing to present-day treatment.

Adult↗

Differentiation of vascular dementia from AD on neuropsychological tests.

BACKGROUND: The concept of vascular dementia (VaD) is currently in a state of evolution. Memory impairment is emphasized as a primary criterion, reflecting the influence of AD on the concept of dementia. We have systematically reviewed whether the nature of neuropsychological dysfunction is distinct in AD and VaD, and whether similar defining criteria for the concept of dementia in both disorders can be supported. METHODS: We searched five bibliographic databases (Medline, Biological Abstracts, EMBASE, PsychINFO, PsychLIT) for research articles in which VaD and AD had been compared using neuropsychological tests and that met criteria for scientific merit. RESULTS: Of the 45 studies, 18 were excluded because of inadequacies, and the remaining 27 were analyzed. There were a number of similarities of dysfunction between VaD and AD. However, when matched for age, education, and severity of dementia, VaD patients had relatively superior function in verbal long-term memory and more impairment in frontal executive functioning compared with AD patients. Interpretation of the results is limited by uncertainty in diagnostic criteria for VaD, possible inclusion bias due to use of clinical diagnosis alone, possible overlap of AD and VaD, and the methodologic shortcomings of some studies. CONCLUSIONS: The neuropsychological differentiation of VaD from AD was consistent with the different neuroimaging findings in the two disorders, and argues for differential criteria for the definition of the syndromes. The simple application of Alzheimer's dementia criteria to VaD, with the inclusion of cerebrovascular disease etiology, may not be sufficient to capture the uniqueness of VaD.

Alzheimer Disease↗

Strategies to contain the emergence of antimicrobial resistance: a systematic review of effectiveness and cost-effectiveness.

OBJECTIVES: To conduct a systematic review of the literature to describe and critically appraise studies reporting on the cost and/or effectiveness of interventions proposed to control the emergence of antimicrobial resistance (AMR). METHODS: The search for relevant studies encompassed consultation with world experts in AMR, and electronic bibliographic database search of: Medline (1960-2000); ISI (1981-2000); EMBASE (1988-2000); Grey Literature (1999-2000); Database of Reviews of Effectiveness (DARE) and the NHS Health Economic Evaluation Database (HEED) at York University's Centre for Reviews and Dissemination (CRD) (numerous years); OPAC (1975-2000); and the Cochrane Library Online (1990-2000). Only studies that concerned the effectiveness or cost-effectiveness of measures specifically designed to contain the emergence of AMR were reviewed. Standardised data extraction sheets, based on existing checklists for effectiveness and cost-effectiveness, were used to assess the validity of each study using the 'risk of bias criteria' suggested in the Cochrane Handbook. Only studies categorised as being at low or moderate risk of bias were reported fully. The reliability of the data review process was monitored by comparison of several, random, independent assessments by all authors. The mix of study methods (i.e. including studies based on non-randomised controlled trials) meant that formal meta-analysis was not possible, and thus a qualitative review was performed. RESULTS: In total, 43 studies were reviewed, with 21 classed as being at moderate or low risk of bias and therefore reported in the paper. These studies covered policies on: restricting the use of antimicrobials (five studies, suggesting that restriction policies can alter prescriber behaviour, although with limited evidence of subsequent effect on AMR); prescriber education, feedback and use of guidelines (six studies, with no clear conclusion); combination therapies (seven studies, showing the potential to lower drug-specific resistance, although for an indeterminate time period); vaccination (three studies showing cost/effectiveness). Most of these studies were: from the developed world, principally the USA; hospital-based, with few community level interventions; and concerned with effectiveness, not cost-effectiveness. CONCLUSIONS: Overall, there is an absence of good evidence concerning what is effective, and especially cost-effective, in reducing the emergence of AMR. However, in addition to more research concerning these forms of intervention, the paper highlights four specific areas for further investigation: validating intermediate or surrogate outcome measures to enable better use to be made of the literature on intermediate measures; development and evaluation of 'macro' strategies; research into specific aspects of AMR in developing countries; and empirical and methodological research concerning the economic evaluation of interventions.

Anti-Bacterial Agents↗

Effect of the hospital nursing environment on patient mortality: a systematic review.

OBJECTIVE: Research has examined the effect of the structure of health systems on health outcomes, but not how outcomes are affected by the nursing environments in hospitals. Our objective was to gather, critically appraise and synthesize all relevant primary research on the effect of the nursing environment on patient mortality. METHODS: Five electronic bibliographic databases were searched from their beginning through to May/June 2001, and Medline and CINAHL were updated to March 2004, using pre-determined search strategies and inclusion criteria. Studies were included if they met pre-determined criteria, reporting primary data both on a hospital environment and patient mortality. Methodological rigour was appraised using accepted criteria for the evaluation of research protocols, including case-mix adjustment. RESULTS: This paper focuses on 27 identified studies that investigated the impact of one or more attributes of the nursing environment on patient mortality. Nineteen studies found an association between one or more unfavourable attributes and higher mortality. There was considerable variability in attribute and outcome measures, settings and research quality across studies. This precluded statistical pooling of results. CONCLUSIONS: On balance, current evidence indicates that social and environmental attributes of hospital nursing practice have an effect on the outcomes of care. Before optimal practice settings can be designed, further research of greater rigour is needed to provide a better understanding of the mechanisms that link the nursing environment to patient outcomes.

Health Services Research↗

A systematic review of factors affecting the judgments produced by formal consensus development methods in health care.

OBJECTIVES: Formal consensus development methods are ways of obtaining and synthesising views of experts, opinion leaders and other stakeholders, and are increasingly being used to develop clinical practice guidelines. Our objective was to examine the impact that the characteristics of individual participants, groups and the consensus process have on the judgments produced by formal consensus development methods in health care. METHODS: Studies were identified from an earlier methodological review and a search of five bibliographic databases for the period January 1996 to December 2004. Studies were eligible if they involved formal consensus development methods and reported differences in judgments between groups or participants. For studies comparing two or more groups overall percentage agreement, the kappa coefficient and the odds ratio for differences in judgments were calculated. RESULTS: There were 22 studies comparing the impact of the characteristics of individual participants within groups and 30 studies comparing the results produced by two or more groups. Practitioners who perform a procedure tend to emphasise the appropriateness of the procedure compared with non-performing practitioners, and individuals from groups that were subject to performance criteria are more critical of those criteria than individuals from other groups. There was no clear pattern for the differences in judgments produced by participants and groups from different countries. CONCLUSIONS: Except for participant specialty there is little general evidence for how the characteristics of participants and groups influence the judgments produced in formal consensus development methods. Multi-specialty groups are preferable to single-specialty groups because of their potential for taking account of a wider range of opinions.

Consensus↗

Characteristics of the U.S. EPA's Office of Pesticide Programs' toxicity information databases.

The United States Environmental Protection Agency's Office of Pesticide Programs (OPP) requires that data from toxicity testing be submitted to the OPP to support the registration of pesticide chemicals. Once the toxicity data are submitted, they are entered into various toxicity databases. The studies are listed in an archival database to catalog and allow retrieval of the study for review. Reviews of toxicity studies are then placed into a separate database that can be retrieved to support a regulatory position. Toxicity information for health effects other than cancer and gene mutations from chronic exposure is reviewed through a reference dose (RfD) approach, and these decisions and supporting data are entered into an RfD database. Carcinogenicity data are reviewed by a peer review process, and these decisions are entered into a newly developed database to show the regulatory decision with supporting data. The mutagenicity data are reviewed and acceptable data are entered into the Genetic Activity Profile system to catalog and display the submitted information. These databases contain the information used for hazard evaluations as part of the OPP review of pesticide chemicals.

Animals↗

BIOETHICSLINE: an overview for searchers.

The BIOETHICSLINE File (BIOETHICS) is a bibliographic database produced at the Kennedy Institute of Ethics, Georgetown University, and made available online through the the National Library of Medicine's MEDLARS system. BIOETHICS provides multidisciplinary coverage of the ethical, legal, and public policy aspects of medicine, health care, and biomedical and behavioral research. This article describes the content and development of the database, suggests effective strategies for searching, and presents illustrative searches. An appendix lists selected major indexing terms (Keywords) from the controlled vocabulary of the Bioethics Thesaurus.

Bioethical Issues↗

AIDS specialty journals.

Prior to 1983, there were no journals specific to the acquired immune deficiency syndrome (AIDS). Publications relevant to the disease are numerous, and are scattered among many sources. These factors, as well as the rate at which relevant information is published, limit the efficient methods by which researchers can obtain current information on AIDS. Use of an "electronic textbook" is one way; online searching of bibliographic databases is another. However, many of the specialty journals are not yet included in major biomedical indices. Thus, they are not brought to the attention of researchers or librarians. Whether any of these titles will gain the status of the primary journals in general medicine remains to be seen. The place of AIDS as the nation's number one health priority could mean that the most important findings may continue to be published in the primary general medical journals. In the meantime, however, librarians should be aware of the content of these journals, and the differences among them. Individual reviews are presented, covering AIDS, AIDS Alert, AIDS Clinical Digest, AIDS Medical Report, AIDS Patient Care, AIDS Research and Human Retroviruses, Acquired Immune Deficiency Syndrome Newsletter, CDC AIDS Weekly, Immunodeficiency Reviews, and Journal of Acquired Immune Deficiency Syndromes.

Acquired Immunodeficiency Syndrome↗

The use of electronic mail at the reference desk: impact of a computer-mediated communication technology on librarian-client interactions.

Commonly recognized computer-mediated communication (CMC) tools include virtual environments, bibliographic databases, listservers, newsgroups, group teleconferencing, interactive messaging systems and electronic mail. The use of these technologies in libraries has grown exponentially over the past decade. Electronic mail has emerged as an especially popular communication tool for librarians, and their colleagues and patrons. This paper explores the use of a reference department electronic mail service and its impact on reference services and librarian-client interactions. Several issues related to the implementation of CMC technologies are presented, including the maintenance and monitoring of reference electronic mail systems, the types of questions that are typically posted, and potential barriers to the implementation and use of reference e-mail.

Academic Medical Centers↗

HIV/AIDS and nutrition: a bibliometric analysis.

Diet and nutrition are directly involved in patient care protocols that reflect a shift in the treatment of HIV/AIDS as a chronic disease, with an emphasis on quality of life and expanded life trajectory. Research concerning HIV/AIDS and nutrition is multidisciplinary, yielding study results that appear in a wide variety of scholarly journals. The purpose of this research was to employ bibliometric techniques to evaluate the body of literature specific to HIV/AIDS and nutrition as well as to determine content overlap among major bibliographic citation databases.

Bibliometrics↗

Complementary and alternative medicine as represented in the HIV/AIDS body of knowledge: a bibliometric analysis.

Although the HIV/AIDS epidemic began more than twenty years ago, there still is no cure for the disease and no vaccine to prevent infection. As with the general population, individuals with HIV/AIDS have sought care using a variety of traditional and nontraditional approaches. The popularity of complementary and alternative interventions among the HIV/AIDS community continues. To understand better the distribution of the HIV/AIDS body of knowledge concerning complementary and alternative medicine (CAM), this study sought to (1) examine the literature specific to the use of complementary and alternative medicine where HIV/AIDS is concerned to determine publication patterns; (2) determine the degree of overlap among bibliographic citation databases that index the literature concerning the use of CAM practices in treating HIV/AIDS; and (3) facilitate access to this body of literature.

Abstracting and Indexing↗

Expert googling: best practices and advanced strategies for using google in health sciences libraries.

Google is the search engine of choice for most Internet users. For a variety of reasons, librarians and other expert searchers do not always use Google to its full potential, even though it provides capabilities not possible in traditional bibliographic databases and other search engines. Applying expert searching principles and practices, such as the use of advanced search operators, information retrieval strategies, and search hedges to Google will allow health sciences librarians to find quality information on the Internet more efficiently and effectively.

Information Storage and Retrieval↗

Finding messages in bottles: living successfully with stroke and aphasia.

The question "What does it take to live successfully with stroke and aphasia?" was posed and answers were sought within already published accounts written by people living with aphasia. Published accounts that were identified as eligible and included in the study had to meet the following criteria: they had to be a published book or journal article that would be nationally available; they had to be authored or co-authored by a person with chronic aphasia due to stroke; and they had to be a personal narrative of some type. 28 publications meeting these criteria were identified through a search of bibliographic databases and websites, and 20 were available for analysis. 4 themes emerged. First, social support was identified as a critical factor in living successfully. Second, successful living appears to require an adaptation of one's perception of self. Third, most of the writers of the accounts looked to the future and set new goals. Finally, all of the published accounts noted the importance of taking charge of one's own continued communication improvement. Characteristics of the writers are discussed. The 4 themes are linked to the professional literature, and implications for future clinical work are explored. The potential bias of the interpreter is acknowledged.

Adaptation, Physiological↗

Interactions of warfarin with garlic, ginger, ginkgo, or ginseng: nature of the evidence.

OBJECTIVE: To review and characterize the evidence describing potential interactions between warfarin and garlic, ginger, ginkgo, or ginseng. DATA SOURCES: Searches of MEDLINE (1966-1999), other bibliographic databases, several abstracting services, and tertiary references were conducted. STUDY SELECTION AND DATA EXTRACTION: Articles were examined by each author, and additional citations were obtained from the references of these articles. Preference was given to Englishlanguage articles of human studies. DATA SYNTHESIS: Evidence is lacking for an interaction of warfarin wth galic or ginger. One case report associates ginseng use with decreased warfarin-maintained anticoagulation effect. Another case report links concomitant use of ginkgo and warfarin with the development of intracerebral hemorrhage. Hemorrhage and tendencies were noted in four cases with ginkgo use and in three cases with garlic; in none of these cases were patients receiving warfarin. CONCLUSIONS: The true risks of these interactions and effects are difficult to characterize due to the limited number and nature of existing reports.

Anticoagulants↗

Safety of zaleplon in the treatment of insomnia.

OBJECTIVE: To evaluate the safety of zaleplon, a quick-acting, rapidly eliminated nonbenzodiazepine (non-BZD) hypnotic, as described in clinical investigations of adult and/or elderly subjects. DATA SOURCES: Published and presented studies evaluating zaleplon, a novel non-BZD, were identified via MEDLINE (1995-July 2001), Current Contents (ISI database), bibliographic reviews, and consultation with sleep specialists who also identified published abstracts containing data not yet published in peer-reviewed journals. DATA SYNTHESIS: Transient and chronic insomnia are common problems that should be clinically evaluated and appropriately treated. BZDs have been a primary pharmacotherapy for treating insomnia, despite their disadvantages. Newer hypnotics, characterized by increased receptor-binding specificity and favorable pharmacokinetics, provide potentially better alternatives to BZDs. Assessments included residual sedation, psychomotor impairment, or cognitive dysfunction during treatment, as well as the occurrence of rebound insomnia and withdrawal effects after discontinuation of therapy. CONCLUSIONS: Zolpidem, the first non-BZD hypnotic, appears to have short- and long-term safety profiles similar to those of the BZD triazolam. Zaleplon, a newer non-BZD sleep medication, has a quick onset of action and undergoes rapid elimination, which results in a better safety profile than previously available agents. Additionally, rebound insomnia and other withdrawal effects have not been demonstrated with zaleplon, and the drug is well tolerated in both young and elderly patients. These characteristics may be clinically advantageous for patients who should not receive BZDs.

Acetamides↗

Glucosamine long-term treatment and the progression of knee osteoarthritis: systematic review of randomized controlled trials.

OBJECTIVE: To investigate the structural and symptomatic efficacy and safety of glucosamine in knee osteoarthritis (OA). DATA SOURCES: Clinical trials of glucosamine were identified through electronic searches (MEDLINE, EMBASE, BIOSIS, EMB review, the Cochrane Library) using the key words glucosamine, osteoarthritis, degenerative joint disease, degenerative arthritis, osteoarthrosis, gonarthrosis, knee, disease progression, and clinical trial. The bibliographic databases were searched from their respective inception dates to August 2004. We also hand-searched reference lists of relevant articles. STUDY SELECTION AND DATA EXTRACTION: Studies were included if they were double-blind, randomized, controlled trials that evaluated oral glucosamine long-term treatment in knee OA; lasting at least one year; and reporting as outcome measures the symptom severity and disease progression as assessed by joint space narrowing. Two authors interpreted data independently. Disagreements were resolved through discussion. DATA SYNTHESIS: Glucosamine sulfate was more effective than placebo in delaying structural progression in knee OA. The risk of disease progression was reduced by 54% (pooled RR 0.46; 95% CI 0.28 to 0.73; p = 0.0011). The number-needed-to-treat was 9 (95% CI 6 to 20). The pooled effect sizes for pain reduction and improvement in physical function were 0.41 (95% CI 0.21 to 0.60; p < 0.0001) and 0.46 (95% CI 0.27 to 0.66; p < 0.0001), respectively, in favor of glucosamine sulfate. Glucosamine sulfate caused no more adverse effects than placebo. CONCLUSIONS: The available evidence suggests that glucosamine sulfate may be effective and safe in delaying the progression and improving the symptoms of knee OA. Due to the sparse data on structural efficacy and safety, further studies are warranted.

Disease Progression↗

Effect on health-related outcomes of interventions to alter the interaction between patients and practitioners: a systematic review of trials.

PURPOSE: We wanted to identify published randomized trials of interventions to alter the interaction between patients and practitioners, develop taxonomies of the interventions and outcomes, and assess the evidence that such interventions improve patients' health and well-being. METHODS: Undertaking a systematic review of randomized trials, we sought trials in primary and secondary care with health-related outcomes, which we found by searching MEDLINE, HealthSTAR, and PsycINFO bibliographic databases through 1999. We also completed one round of manual citation searching. RESULTS: Thirty-five trials were included. Most were set in primary care in North America. Trials were heterogeneous in populations, settings, interventions, and measures. Interventions frequently combined several poorly described elements. Explicit theoretical underpinning was rare, and only one study linked intervention through process to outcome measures. Health outcomes were rarely measured objectively (6 of 35), and only 4 trials with health outcomes met predefined quality criteria. Interventions frequently altered the process of interactions (significantly in 73%, 22 of 30 trials). Principal outcomes favored the intervention group in 74% of trials (26 of 35), reaching statistical significance in 14 (40%). Positive effects on health outcomes achieved statistical significance in 44% of trials (11 of 25); negative effects were uncommon (5 of 25, 20%). Simple approaches to increasing the participation of patients in the clinical encounter, such as providing practitioners with a note from patients about their concerns beforehand, showed promise, as did more complex programs providing specific information about disease and attention to emotion. Apparently similar interventions varied in effectiveness across studies. CONCLUSIONS: Successful interactions between patients and their practitioners lie at the heart of medicine, yet there are few rigorous trials of well-specified interventions to inform best practice. Trial evidence suggests that a range of approaches can achieve changes in this interaction, and some show promise in improving patients' health. To advance knowledge further, we need to replicate promising studies using rigorous methods. These should include explicit theoretical frameworks designed to link effects on key communication and interaction characteristics through to effects on health outcomes.

Delivery of Health Care↗