Second, if the intensity of the intervention is not feasible for routine care, applicability is reduced. In summary statements, be sure to describe to whom the evidence applies and highlight specific limitations to applicability of the evidence. ApplicationsTwo examples of a wide spread applicability of topographic maps, Remote Sensing and GIS data in high mountain environment are chosen to document the possibilities and limits of … Int J Technol Assess Health Care 2009;25:323-30. http://www.ncbi.nlm.nih.gov/pubmed/19619351 Thorpe KE, Zwarenstein M, Oxman AD, et al. In addition, the most applicable evidence may differ when considering a benefit or a harm. Although the use of objective data in these two examples is good for internal validity, the applicability of these trials is not as strong. Although some would think of these issues as applicability issues associated with the population, they are placed here for added emphasis. The These women were subject to a double-blind study without consent. References: Gartlehner G, Hansen RA, Nissman D, et al. Finally, clearly report and highlight major applicability issues of efficacy trials and what impact they may have on the interpretation of the study. Which Series of Studies Has an Applicability Issue? Is the systematic review intended to inform Medicare? For our purposes, assume that four other studies were also available with similar PICOS domains. Framing Applicability Issues When setting up a systematic review, researchers need to understand contemporary practice. When can research from one setting be useful in another? Keep this list reasonable to avoid being too nihilistic. Determining how well the study population approximates the target population is critical to determining applicability. In some instances, subgroup analyses or meta-regression can be used to explore the impact of these factors on the results. 3Department for Evidence-based Medicine and Clinical Epidemiology, Danube University, Krems, Austr… Step 3. Abstract. In the comparator column, the comparator is described, and then the extent of use of other medications already known to impact the disease process is identified. In the fourth example, trials are conducted to evaluate the benefits and harms of carotid endarterectomy in patients at risk for stroke. See our User Agreement and Privacy Policy. Determine and Report the Most Important Factors in PICOS Format In Step 1, first identify conditions that affect applicability for the topic at hand. Although the Consolidated Framework for Implementation Research (CFIR) has never been evaluated in a practical context, it appeared to be a suitable theoretical framework to guide an implementation process. If high levels of nonadherence, adverse effects, or lack of response are found, then this reduces applicability of the study results because better safety or superior efficacy will be seen versus the general population with the disease. However, two-thirds of African Americans have heart failure as a result of long-standing hypertension. For example, criteria concerning population characteristics could affect the applicability of implementation or the transferability of effects, or both. How Individual Studies Consider Applicability When judging applicability, there are several general considerations. Effect modifiers are cofactors that determine the extent to which an intervention results in an outcome. Reference: Slutsky J, Atkins D, Chang S, et al. Next, ascertain whether there was a run-in period and if so the reasons for attrition before randomization. Fifth, if cointerventions would likely modify the effectiveness of therapy, applicability might be reduced. Next, the severity or the stage of illness needs to be evaluated. Setting and Applicability: Examples Here are two examples showing the relationship between setting and applicability. Consider and Summarize the Applicability of a Body of Evidence From Individual Studies In contrast to Step 2, which is concerned with individual study evaluations of applicability, step 3 involves making the aggregate applicability for each component of the PICOS framework (i.e., population, intervention, comparators, outcomes, and setting) and the overall assessment of applicability. Applicability. Rigor of qualitative research continues to be challenged even now in the 21st century—from the very idea that qualitative research alone is open to questions, so with the terms rigor and trustworthiness. Frame applicability to specific clinical or policy questions the systematic review is intended to inform. For example, trials conducted in tertiary medical centers with experienced surgeons performing a procedure after years of practice may not reflect the effects that would occur if this procedure were performed in smaller community hospitals. If they repeat the questionnaire days, weeks or months apart and give the same answers, this indicates high test-retest reliability. Descriptive research can be used to investigate the background of a research problem and get the required information needed to carry out further research. Now customize the name of a clipboard to store your clips. First, studies often do not report on factors needed to judge applicability. For the comparison of myocardial debulking therapy versus watchful waiting, the strength of evidence is determined to be low. In the Effective Health Care Program, the perspectives of clinicians, patients, and policymakers are usually considered. Are certain subpopulations biologically or clinically different from others? The Applicability of Lean and Six Sigma Techniques to Clinical and … Input from clinical experts and stakeholders and a review of current practices can help identify specific applicability issues. Effectiveness trials have greater applicability than efficacy trials and, in this method, meet at least five of the seven following criteria: Enroll a primary-care population Have less-stringent eligibility criteria Assess health-related outcomes instead of only intermediate ones Have a long study duration and clinically relevant treatment modalities Assess for adverse events Have an adequate sample size to assess minimally important differences from a patient perspective Use intention-to-treat analysis This is only for illustrative purposes and other authors, such as Thorpe et al. The left ventricular mass, average age of onset, and rate of progression are different based on the ethnicity of the population. If the population is a referral or specialty population, the applicability to the general population with the disease in the primary care arena is reduced. Establishing validity and reliability in qualitative research can be less precise, though participant/member checks, peer evaluation (another researcher checks the researcher’s inferences based on the instrument (Denzin & Lincoln, 2005), and multiple methods (keyword: triangulation), are convincingly used. First, review the eligibility criteria and ascertain the proportion of screened individuals enrolled in the study. Step 2. In: Methods guide for comparative effectiveness reviews . In the last two examples, the problem is not with the stated comparator per se, but rather with the background therapies being employed. Summary Table for Body of Evidence Applicability In this slide, we use the template for a summary table to assess the applicability of a body of evidence. If the disease prevalence is markedly different than in the community, then applicability is reduced. In the first example, to maximize internal validity, the Fracture Intervention Trial (FIT) used very stringent inclusion and exclusion criteria. A review of research and evaluation studies into IT in education shows us strengths and weaknesses. Intervention and Applicability There are several factors that can limit the applicability of the intervention being employed in studies and that need to be assessed. Applicable results likely reflect the expected outcomes when the intervention is employed in clinical practice. Terms such as external validity, generalizability, directness, and relevance are similar to applicability. Judgments about applicability of the evidence should consider the entire body of studies. Please read through the data extracted for this study, because we will revisit this example throughout the rest of the module. In general, we are interested in the applicability of evidence to a primary care population in the United States. Applicability refers to the process of evaluating a study and determining what specific people might benefit from the intervention. These trials were conducted in select, large, tertiary care medical centers and may not be applicable to other settings.”. An example of a Request for Proposals is given in Figure B-3. The eligible patients were younger, healthier, and more adherent to therapy than is typical of patients with osteoporosis, which would reduce applicability of the trial results to typical osteoporosis patients. Example; Test-retest: The consistency of a measure across time: do you get the same results when you repeat the measurement? Research methodology provides us the principles for organizing, planning, designing and conducting a good research. A summary table with a PICOS structure should be generated. In clinical practice, most patients are on higher doses of the comparator. applicability Example Feature that should be abstracted into evidence tables Population Narrow eligibility criteria and exclusion of those with comorbidities In the FIT trial,13 the trial randomized only 4000 of 54,000 originally screened. Only 20 years later, when the children of these Registries may provide information on how the populations in trials are different from the populations that would receive the intervention in actual practice. Subgroup analyses suggest that benefits occur predominantly in those patients not receiving standard therapy, thereby exacerbating the limitations this places on applicability. Looks like you’ve clipped this slide to already. As such, these data are not as applicable to clinical practice where patients with microcytic anemia are given iron supplementation without zinc. In this example, a trial is identified. These factors strengthen applicability. As we will show in the next example, each individual study can have relatively low applicability in at least one aspect of PICOS, but the body of evidence can have high applicability. Next, compare the event rates in the treatment and control groups to community averages. Thus, in subsequent clinical trials, it appears that certain therapies, such as hydralazine with isosorbide dinitrate, work better in African Americans, but ß-blockers, such as metoprolol succinate and bucindolol, work better in whites. Setting and Applicability Setting refers to either the geographic setting or the clinical setting. Evidence Table Template for Applicability Here is a template for an applicability evidence table. Since only patients tolerating therapy were randomized, the trial found a very low incidence of adverse events. Where possible, describe proportions (percentage older than 65 years of age) rather than an age range or average age. We need to emphasize that this is a tool that can help the reviewer look across studies so that they can synthesize and describe applicability concerns or limitations accurately in the conclusions. Slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. A group of participants complete a questionnaire designed to measure personality traits. This study had acceptable diagnostic accuracy (sensitivity, 72%; specificity, 92%) and therefore was not considered to have overinterpreted the clinical applicability of its results. Available at: http://www.effectivehealthcare.ahrq.gov/ehc/products/118/324/2008_1118CompareInterventions.pdf. No empiric data exist that validate a scoring system for applicability. If you continue browsing the site, you agree to the use of cookies on this website. A simple and valid tool distinguished efficacy from effectiveness studies. With the use of a summary applicability table, it becomes easier for a reviewer to describe in the text how aspects of studies impact the interpretations of study results in answering a question. Judge Applicability and Strength of Evidence Separately Applicability is best reported separately from quality or strength of evidence. Learning Objectives There are three main objectives for this module. Applicability is not the sum of applicability of individual studies. This is especially true in diseases that afflict patients with lower compliance rates such as abusers of alcohol and drugs. Applicability Resources In the Effective Health Care Program, clinical experts and stakeholders help ensure that the comparative effectiveness reviews are relevant to their constituencies. A pragmatic-explanatory continuum indicator summary (PRECIS): a tool to help trial designers. Literature based in patients much younger and healthier than the target population using techniques that cannot readily be used in contemporary practice will not be as useful as a representative literature base, all other things being equal. Unfortunately, these clinical trials, by and large, compared bypass surgery versus angioplasty with or without a bare metal stent. In the second example, it is known that hospitals performing large numbers of abdominal aortic aneurysm repair surgeries have lower short-term mortality rates. Some evidence hierarchies (GRADE) consider applicability “or directness” when assessing the quality of evidence. No harms were being evaluated. In the second example, trials comparing magnesium to placebo in patients with acute myocardial infarction are included. For example, if a new research paper concludes that smoking is not related to lung cancer, readers would be very skeptical because it disagrees with the weight of existing evidence. The effective application of qualitative methods to other disciplines, including clinical, health service and education research, has a rapidly expanding and robust evidence base. Describe whether these outcomes reflect the most important benefits or harms. It is used in multiple ways by different organizations, and especially when getting the required information about their target audience. Applicability data should be used to place the available benefits and harms literature in context. Next, the demographics need to be reviewed. Step 3. Rigor is simply defined as the quality or state of being very exact, careful, or with strict precision8 or the quality of being thorough and accurate.9 The term qualitative rigor itself is an oxymoron, considering that qualitative research is a journey of explanation and discovery tha… They were placed on etanercept. Studies conducted in the United States may be more applicable to clinicians in the United States but less applicable in the developing world. Qualitative approaches have particular potential in psychiatry research, singularly and in combination with quantitative methods. Population and Applicability: Examples Here are some examples where the populations used in trials limited applicability. Consistency of study results across different populations and settings increases confidence in the applicability of the results. The PICOS format (i.e., population, intervention, comparators, outcomes, and setting) is used to organize the data. Studies conducted only with Latinos may not be applicable to Asians, but they are very applicable to clinicians treating Latinos. As well as individual studies, a number of reviews of the extant literature where SCT has been applied are available. You may have a specific patient in mind when you search the literature, or you may have a more general question about types of patients with shared problems and what interventions are most effective for these types of patients. The use of composite end points can also lower applicability because it is not always clear which components of the composite end point are being affected and to what extent. Rockville, MD: Agency for Healthcare Research and Quality, Posted November 2008. -3, , research project manager in health technology assessment, , professorial research fellow in health services research, Applicability and generalisability of published results of randomised controlled trials and non-randomised studies evaluating four orthopaedic procedures: methodological systematic review, http://creativecommons.org/licenses/by-nc/2.0/, http://creativecommons.org/licenses/by-nc/2.0/legalcode, Government of Jersey General Hospital: Consultant in Older Age Psychiatry, The Morris House Group Practice: GP Teaching Fellow Post x2, Cornwall Partnership NHS Foundation Trust: Opportunities in Psychiatry, The Royal Surrey NHS Foundation Trust: Resident Consultant in Paediatrics with an interest in Oncology, The Royal Surrey NHS Foundation Trust: Resident Consultant in Paediatrics with an interest in Cardiology, Women’s, children’s & adolescents’ health. For comparators, describe each, whether they reflect the best alternative therapy, and how this may impact treatment effect size. Reference: Shadish W, Cook T. Experimental and quasi-experimental design for generalized causal inference . So although the show can demonstrate the dramatic effect that lifestyle modification can have under optimal practice conditions, the applicability of this intervention for the average American is low. Consider applicability when determining the scope of the review or when identifying key questions to be answered. Start with a broad list in PICOS format (population, intervention, comparators, outcomes, and setting) and then select those that are really important and likely to affect applicability. Participants were healthier, younger, thinner, and more adherent than typical women with osteoporosis. Increased use of CONSORT (Consolidated Standards of Reporting Trials) diagrams help to increase transparency in clinical trials, but deficiencies remain. Issues of validity and reliability in qualitative research | Evidence … (PDF) An introduction to the applicability of qualitative research … Slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. Although there are numerous demographic factors that could have impacted applicability, these were selected a priori as being the most important. Finally, if the training and skill level of an intervention team exceed those of the general practitioners who would be performing the intervention in the community, then applicability is reduced. GRADE = Grading of Recommendations Assessment, Development and Evaluation. Most trials are efficacy trials, which maximize internal validity at the expense of applicability. Domain applicability can also be determined based on chemical similarity. Keep in mind that applicability depends on the user of the information. In the second example, selecting patients who are more compliant and then instituting techniques such as pill counts, telephone reminders, and compliance incentives can overestimate the degree of benefit that a therapy can provide in clinical practice. In contrast, the studies in scenario 2 are dispersed across the continuum of age, which provides greater confidence in the ability of the results to be extrapolated. Internal validity concerns are not altered by changes in perspective, but applicability is. The applicability of a trial’s results could be limited if patients represent only a small proportion of those being treated in normal practice.10 The participation of centres with different resources and surgeons with different skills may mean that treatment effects observed in research may not be applicable, or at worst are irrelevant, to non-research settings.11 12 13 14 15 Surgical … Credibility is present when the research results mirror the views of the people under study. Study Parameters Affect Applicability Study parameters may affect applicability through different mechanisms. Credibility, validity, reliability and transferability, When to Select Observational Studies Quiz. Systematic Review Process Overview This slide illustrates the steps in the systematic review process. However, as we will see in subsequent slides, many other factors should be assessed as well. First, judge whether or not a study is an effectiveness trial or an efficacy trial. 2Center for Outcomes and Evidence, Agency for Healthcare Research and Quality, Rockville, MD. First, you have to understand the fundamental ideas involved in measuring. The theory of planned behavior and its applicability in research. Comparator and Applicability: Examples Here are three examples where the choice of comparator negatively affected applicability. Note major applicability limitations of studies in the last column of the evidence tables and highlight effectiveness studies. In the second example, patients meeting inclusion and exclusion criteria were put through an active run-in period. First, assess the medication dose, schedule, and duration. If a study is conducted in a country or region where standards of care differ markedly from the setting of interest, applicability may be reduced. Similarly, if there are several potential comparators, the researcher needs to determine whether a representative one or a substandard one (i.e., known either to have poorer efficacy or greater adverse events) was chosen. On the television series, “The Biggest Loser,” obese subjects are removed from their jobs and families and sent to a resort where physicians, dietitians, and personal trainers work with them on losing weight. Hence, it is the science and philosophy behind all researches [Legesse, 2014]. If the dose is much higher than previously used or requires multiple daily doses known to reduce compliance, then applicability might be reduced. Third, if monitoring practices or visit frequency is more intensive than that used in practice, applicability is reduced. However, in China and Russia, the use of other more-sensitive breast cancer-detection methods such as mammography is minimal. First, identify beforehand a limited number of factors that are most likely to influence applicability of evidence for the specific issue being reviewed and report the relevant factors from individual studies. Thus, applicability is reduced. It is important also that the review should include some historical as well as contemporary material in order to put the subject being studied into context. For example, if several trials utilize a higher than average risk population but other trials do not, subgroup analyses can be conducted. This module focuses on the assessment of applicability. If the definition is markedly different than those used in clinical practice, then that negatively affects applicability. We then give the conclusion: “When compared with watchful waiting, the use of myocardial debulking reduced hospitalizations without impacting survival.” Finally, we describe the applicability of this evidence: “These results are predominantly limited to patients 65 years or older with NYHA [New York Heart Association] class II and III disease.” This is similar to the population with heart failure in the United States. Finally, we learned that important limitations of the applicability of the evidence should be described within each summary conclusion. The applicability of the definitions of hip OA in the present study was made operational as the ability to discriminate between hip OA and no hip OA, the ability to categorise the severity of hip OA, and the skills and tools needed to classify people according to the respective definitions (table 4). Effectiveness trials are specifically designed to produce applicable results and should be highlighted. For the comparator, the researcher first needs to evaluate the medication dose, schedule, and duration. Key Messages (II) In this module, we also learned that: Reviewers should routinely select the most important characteristics that may limit the applicability of the evidence and assess if there is any evidence that variation within the factors identified truly modifies the outcome effects. Studies conducted in large academic medical centers in major cities might not be as applicable to rural settings. Thus, the important question is not whether magnesium would benefit patients with a myocardial infarction but whether it would still provide benefit in addition to the standard medical therapy currently being used for acute myocardial infarction. Thus, when evaluating studies comparing complication rates between surgical repair and other therapies, the setting where the studies take place is very important in determining applicability. The researcher should determine if this regimen is reflective of current practice. David Atkins, M.D., M.P.H.1 Stephanie Chang, M.D., M.P.H.2 Gerald Gartlehner, M.D., M.P.H.3 David I. Buckley, M.D., M.P.H.4 Evelyn P. Whitlock, M.D., M.P.H.5 Elise Berliner, Ph.D.2 David Matchar, M.D., FACP6,7 1Office of Research and Development, Department of Veterans Affairs, Washington, DC. In this case, a cohort study might be more applicable for that harm. example of unethical research is the experiment conducted between 1950-1952 in which more than 1,000 pregnant women were given diethylstilbestrol to prevent miscarriages. Reports should clearly highlight issues that raise important questions about applicability of individual studies in a “comments” or “limitations” section in evidence tables or in the text. If efficacy and effectiveness trials are available, they should be compared and contrasted. What types of care or procedures are routine or represent the standard of care? Both quantitative and qualitative studies conducted in the past have often been based on inadequate design, limited discussion of settings or measurement development and analysis. Boston: Houghton Mifflin; 2002. In the first example, a study of a new antidepressant compares its higher dose regimen to a low dose of its comparator. Clipping is a handy way to collect important slides you want to go back to later. Three Steps To Assess Applicability This is a systematic but practical approach to judge applicability. In step 1 of the process, data on factors identified a priori as being most likely to impact applicability are extracted for each study and entered in the table. The main outcomes of interest in the key questions being asked, median followup, and setting are identified. For example, trials with run-in periods might have more adherent participants with less risk of adverse events. Finally, given the information on the PICOS domains, the judgment that this is an efficacy trial is made and limitations to applicability are delineated. Here we consider two of major measurement concepts. However, most Americans cannot afford to leave their jobs and families for several months and devote all of their time and effort to lifestyle modification. In both scenarios, there is a significant reduction in the odds of the event with therapy and no statistical heterogeneity. In heart failure trials, two-thirds of white patients have heart failure as a result of ischemic heart disease. Intervention features may also affect the ability to generalize the effectiveness or safety of the intervention to use in everyday practice. We explore five areas so that we know what the population in the real world looks like, what interventions are currently used, what comparators are most relevant, what outcomes are of greatest interest, and in what settings care is delivered. Which one the scientist uses, depends on the aims of the study and the nature of the phenomenon: Implementing clinical practice guidelines (CPGs) in healthcare settings is a complex intervention involving both independent and interdependent components. Unlike benefits and harms data, applicability data do not have to be reviewed systematically. A collection of studies may provide broad applicable evidence even if individual studies do not. Watchful waiting would be reasonable if the baseline treatment in both groups was standard medical therapy; unfortunately, this was not the case with our literature base, which limited applicability. The Importance of Applicability in Systematic Reviews Unless the evidence synthesized within a systematic review is applicable to relevant populations under realistic practice conditions, the conclusions may be inappropriate for guiding clinical or policy decisions. Are they mostly female, mostly elderly, mostly ethnic minorities? Without another method to detect breast cancer, these studies may overemphasize the value of breast self-examinations. The AHRQ Training Modules for the Systematic Reviews Methods Guide: An Introd... No public clipboards found for this slide. ... Statistics Tutorial - Help on Statistics and Research; Assessing applicability when comparing medical interventions: AHRQ and the Effective Health Care Program. It is critical to understand rigor in research. Individually, the studies might have limited applicability, but together the body of evidence is applicable. Understanding applicability, also referred to as relevance, the extent to which published results are likely to reflect expected outcomes when an intervention is applied broadly across populations.