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Pragmatic Free Trial Meta<br><br>Pragmatic Free Trail Meta is an open data platform that facilitates research into pragmatic trials. It collects and shares cleaned trial data and ratings using PRECIS-2 which allows for multiple and varied meta-epidemiological studies to examine the effects of treatment across trials with different levels of pragmatism and other design features.<br><br>Background<br><br>Pragmatic studies provide real-world evidence that can be used to make clinical decisions. The term "pragmatic" however, is a word that is often used in contradiction and its definition and measurement need further clarification. Pragmatic trials are intended to inform clinical practices and policy choices, rather than confirm a physiological hypothesis or clinical hypothesis. A pragmatic trial should aim to be as close as possible to real-world clinical practices, including recruiting participants, setting, design, implementation and delivery of interventions, determination and analysis outcomes, and primary analysis. This is a key distinction from explanatory trials (as described by Schwartz and Lellouch1) which are intended to provide a more thorough proof of the hypothesis.<br><br>The most pragmatic trials should not blind participants or clinicians. This could lead to a bias in the estimates of treatment effects. Pragmatic trials will also recruit patients from different healthcare settings to ensure that the results can be applied to the real world.<br><br>Finally, pragmatic trials must focus on outcomes that matter to patients, such as quality of life and functional recovery. This is particularly relevant when it comes to trials that involve the use of invasive procedures or potential for serious adverse events. The CRASH trial29 compared a 2 page report with an electronic monitoring system for hospitalized patients with chronic heart failure. The catheter trial28, however was based on symptomatic catheter-related urinary tract infection as the primary outcome.<br><br>In addition to these characteristics, pragmatic trials should minimize the trial's procedures and data collection requirements in order to reduce costs. Finaly these trials should strive to make their findings as relevant to actual clinical practices as they can. This can be accomplished by ensuring that their primary analysis is based on the intention to treat approach (as described in CONSORT extensions).<br><br>Many RCTs which do not meet the criteria for pragmatism, but contain features contrary to pragmatism have been published in journals of different types and incorrectly labeled as pragmatic. This could lead to false claims of pragmatism, and the usage of the term should be standardised. The creation of a PRECIS-2 tool that offers an objective, standardized assessment of pragmatic features is a first step.<br><br>Methods<br><br>In a practical trial the goal is to inform clinical or policy decisions by demonstrating how the intervention can be integrated into everyday routine care. This differs from explanation trials that test hypotheses about the cause-effect connection in idealized conditions. In this way, [http://eric1819.com/home.php?mod=space&uid=674283 프라그마틱 정품 확인법] pragmatic trials may have less internal validity than explanation studies and are more susceptible to biases in their design analysis, conduct, and design. Despite their limitations, pragmatic studies can be a valuable source of information to make decisions in the context of healthcare.<br><br>The PRECIS-2 tool scores an RCT on 9 domains, ranging from 1 to 5 (very pragmatic). In this study the domains of recruitment, organisation and flexibility in delivery, flexible adherence and follow-up scored high. However, the primary outcome and the method for missing data was scored below the pragmatic limit. This suggests that it is possible to design a trial that has high-quality pragmatic features, without damaging the quality of its outcomes.<br><br>It is difficult to determine the degree of pragmatism within a specific study because pragmatism is not a have a binary attribute. Certain aspects of a research study can be more pragmatic than others. A trial's pragmatism can be affected by changes to the protocol or the logistics during the trial. Koppenaal and colleagues discovered that 36% of the 89 pragmatic studies were placebo-controlled, or [http://bbs.lingshangkaihua.com/home.php?mod=space&uid=2093378 프라그마틱 슬롯체험] 홈페이지; [https://www.metooo.co.uk/u/66e5898ef2059b59ef33a8aa super fast reply], conducted prior to licensing. The majority of them were single-center. Therefore, they aren't quite as typical and can only be called pragmatic if their sponsors are tolerant of the lack of blinding in such trials.<br><br>Additionally, a typical feature of pragmatic trials is that researchers attempt to make their findings more valuable by studying subgroups of the sample. This can result in unbalanced analyses that have less statistical power. This increases the possibility of omitting or ignoring differences in the primary outcomes. This was a problem in the meta-analysis of pragmatic trials as secondary outcomes were not adjusted for differences in covariates at baseline.<br><br>Furthermore, pragmatic studies can pose difficulties in the collection and interpretation of safety data. This is due to the fact that adverse events are typically reported by participants themselves and are prone to reporting delays, inaccuracies or coding errors. It is essential to improve the quality and accuracy of the outcomes in these trials.<br><br>Results<br><br>While the definition of pragmatism may not require that all trials be 100 percent pragmatic, there are benefits to including pragmatic components in clinical trials. These include:<br><br>By incorporating routine patients, the results of the trial can be more quickly translated into clinical practice. However, pragmatic studies can also have disadvantages. For instance, the right type of heterogeneity can help a trial to generalise its results to different patients and settings; however the wrong type of heterogeneity could reduce assay sensitivity, [https://images.google.cg/url?q=https://www.metooo.com/u/66e54d8d9854826d166ba866 프라그마틱 슬롯 무료체험] and thus reduce the power of a trial to detect even minor effects of treatment.<br><br>A variety of studies have attempted to classify pragmatic trials using different definitions and scoring methods. Schwartz and Lellouch1 created a framework to discern between explanation-based studies that prove the physiological hypothesis or clinical hypothesis and pragmatic studies that guide the selection of appropriate treatments in the real-world clinical practice. The framework consisted of nine domains evaluated on a scale of 1-5 with 1 being more informative and 5 was more practical. The domains were recruitment, setting, intervention delivery, flexible adherence, follow-up and primary analysis.<br><br>The initial PRECIS tool3 had similar domains and scales from 1 to 5. Koppenaal et al10 created an adaptation of this assessment dubbed the Pragmascope that was easier to use in systematic reviews. They found that pragmatic systematic reviews had a higher average scores in the majority of domains but lower scores in the primary analysis domain.<br><br>This difference in primary analysis domains could be explained by the way that most pragmatic trials approach data. Some explanatory trials, however do not. The overall score for pragmatic systematic reviews was lower when the areas of organization, flexible delivery, and follow-up were merged.<br><br>It is important to understand  [https://yogicentral.science/wiki/Lassitermacias5346 프라그마틱 무료] 정품인증 ([https://dokuwiki.stream/wiki/3_Common_Reasons_Why_Your_How_To_Check_The_Authenticity_Of_Pragmatic_Isnt_Performing_And_What_You_Can_Do_To_Fix_It Dokuwiki.Stream]) that the term "pragmatic trial" does not necessarily mean a low quality trial, and indeed there is an increasing number of clinical trials (as defined by MEDLINE search, however this is not specific or sensitive) which use the word "pragmatic" in their title or abstract. These terms could indicate a greater appreciation of pragmatism in abstracts and titles, however it isn't clear whether this is evident in the content.<br><br>Conclusions<br><br>As the importance of evidence from the real world becomes more commonplace and pragmatic trials have gained popularity in research. They are clinical trials that are randomized that compare real-world care alternatives rather than experimental treatments under development. They involve patient populations which are more closely resembling the ones who are treated in routine care, they use comparators which exist in routine practice (e.g. existing drugs), and they depend on participants' self-reports of outcomes. This method can help overcome the limitations of observational research, like the biases that are associated with the reliance on volunteers, and the lack of coding variations in national registries.<br><br>Other advantages of pragmatic trials are the ability to use existing data sources, and a greater chance of detecting meaningful changes than traditional trials. However, these tests could be prone to limitations that undermine their effectiveness and generalizability. For instance the rates of participation in some trials may be lower than expected due to the healthy-volunteer effect and incentives to pay or compete for participants from other research studies (e.g., industry trials). Many pragmatic trials are also limited by the need to recruit participants quickly. Practical trials aren't always equipped with controls to ensure that any observed differences aren't caused by biases in the trial.<br><br>The authors of the Pragmatic Free Trial Meta identified 48 RCTs that self-labeled themselves as pragmatic and that were published from 2022. They assessed pragmatism using the PRECIS-2 tool, which consists of the domains eligibility criteria, recruitment, flexibility in intervention adherence, and follow-up. They found that 14 of these trials scored highly or pragmatic pragmatic (i.e., scoring 5 or more) in one or more of these domains, and that the majority of these were single-center.<br><br>Trials that have high pragmatism scores tend to have broader criteria for eligibility than conventional RCTs. They also have patients from a variety of hospitals. According to the authors, can make pragmatic trials more relevant and useful in everyday practice. However, they don't ensure that a study is free of bias. Moreover, the pragmatism of a trial is not a predetermined characteristic and a pragmatic trial that does not contain all the characteristics of a explanatory trial can yield valid and useful results.
Pragmatic Free Trial Meta<br><br>Pragmatic Free Trail Meta is an open data platform that allows research into pragmatic trials. It collects and shares cleaned trial data and ratings using PRECIS-2, permitting multiple and varied meta-epidemiological studies that compare treatment effects estimates across trials with different levels of pragmatism as well as other design features.<br><br>Background<br><br>Pragmatic studies provide real-world evidence that can be used to make clinical decisions. The term "pragmatic" however, is a word that is often used in contradiction and its definition and assessment need further clarification. Pragmatic trials should be designed to guide clinical practice and policy decisions, not to confirm a physiological or clinical hypothesis. A pragmatic study should strive to be as close as is possible to real-world clinical practices that include recruiting participants, setting, design, implementation and delivery of interventions, determining and analysis outcomes, and primary analyses. This is a major difference between explanatory trials as described by Schwartz and Lellouch1 which are designed to test the hypothesis in a more thorough way.<br><br>Truely pragmatic trials should not conceal participants or the clinicians. This can result in bias in the estimations of the effects of treatment. Pragmatic trials should also seek to attract patients from a variety of health care settings so that their results are generalizable to the real world.<br><br>Finally, pragmatic trials must concentrate on outcomes that are important to patients, such as the quality of life and functional recovery. This is especially important for trials involving the use of invasive procedures or potential for dangerous adverse events. The CRASH trial29, for instance was focused on functional outcomes to evaluate a two-page case report with an electronic system to monitor the health of patients admitted to hospitals with chronic heart failure. In addition, the catheter trial28 focused on urinary tract infections that are symptomatic of catheters as its primary outcome.<br><br>In addition to these features pragmatic trials should reduce the trial's procedures and data collection requirements to reduce costs. Finally, pragmatic trials should seek to make their results as applicable to clinical practice as they can by ensuring that their primary analysis follows the intention-to treat approach (as described in CONSORT extensions for pragmatic trials).<br><br>Despite these guidelines however, a large number of RCTs with features that defy the concept of pragmatism have been mislabeled as pragmatic and published in journals of all types. This can lead to false claims of pragmaticity, and the use of the term should be standardized. The development of the PRECIS-2 tool, which provides an objective and standard assessment of practical features is a great first step.<br><br>Methods<br><br>In a pragmatic study it is the intention to inform policy or clinical decisions by showing how an intervention could be integrated into routine treatment in real-world situations. Explanatory trials test hypotheses concerning the causal-effect relationship in idealized conditions. Therefore, pragmatic trials could have less internal validity than explanatory trials and may be more susceptible to bias in their design, conduct and analysis. Despite these limitations, pragmatic trials can be a valuable source of information for  [https://atavi.com/share/wukvi9z1konli 프라그마틱 카지노] decision-making in healthcare.<br><br>The PRECIS-2 tool measures the degree of pragmatism within an RCT by scoring it across 9 domains ranging from 1 (very explicit) to 5 (very pragmatic). In this study the areas of recruitment, organisation, flexibility in delivery, flexible adherence and follow-up were awarded high scores. However, the principal outcome and method of missing data was scored below the pragmatic limit. This suggests that a trial could be designed with effective practical features, yet not harming the quality of the trial.<br><br>It is hard to determine the degree of pragmatism within a specific trial because pragmatism does not possess a specific characteristic. Some aspects of a study can be more pragmatic than others. Additionally, logistical or protocol changes during the trial may alter its score on pragmatism. In addition 36% of 89 pragmatic trials identified by Koppenaal et al were placebo-controlled or conducted prior to approval and a majority of them were single-center. They are not close to the norm, and can only be referred to as pragmatic if their sponsors accept that such trials aren't blinded.<br><br>A common aspect of pragmatic research is that researchers try to make their findings more meaningful by analyzing subgroups of the trial sample. However, this often leads to unbalanced comparisons and lower statistical power, thereby increasing the chance of not or misinterpreting the results of the primary outcome. In the case of the pragmatic studies included in this meta-analysis, this was a significant problem because the secondary outcomes weren't adjusted for differences in baseline covariates.<br><br>In addition the pragmatic trials may be a challenge in the collection and interpretation of safety data. This is due to the fact that adverse events are generally reported by the participants themselves and prone to reporting delays, inaccuracies or coding errors. It is crucial to improve the quality and accuracy of the results in these trials.<br><br>Results<br><br>While the definition of pragmatism does not require that all clinical trials are 100% pragmatic there are benefits when incorporating pragmatic components into trials. These include:<br><br>Increasing sensitivity to real-world issues, reducing cost and size of the study, and enabling the trial results to be faster transferred into real-world clinical practice (by including routine patients). However, pragmatic studies can also have disadvantages. The right type of heterogeneity, for example could allow a study to expand its findings to different settings or patients. However, the wrong type can decrease the sensitivity of the test, and therefore lessen the power of a trial to detect even minor effects of treatment.<br><br>A variety of studies have attempted to categorize pragmatic trials using various definitions and scoring methods. Schwartz and Lellouch1 have developed a framework that can discern between explanation-based studies that confirm the physiological hypothesis or clinical hypothesis and pragmatic studies that inform the choice for appropriate therapies in clinical practice. Their framework comprised nine domains that were scored on a scale ranging from 1 to 5 with 1 indicating more explanatory and 5 indicating more practical. The domains covered recruitment of intervention, setting up, delivery of intervention, flexible compliance and primary analysis.<br><br>The initial PRECIS tool3 included similar domains and an assessment scale ranging from 1 to 5. Koppenaal et al10 created an adaptation of this assessment called the Pragmascope that was easier to use in systematic reviews. They discovered that pragmatic reviews scored higher in most domains, but scored lower in the primary analysis domain.<br><br>The difference in the primary analysis domains could be explained by the way that most pragmatic trials analyze data. Some explanatory trials, however do not. The overall score was lower for pragmatic systematic reviews when the domains on organisation, flexible delivery and follow-up were merged.<br><br>It is crucial to keep in mind that a pragmatic study should not necessarily mean a low-quality study. In fact,  [https://sexduck0.werite.net/how-to-build-a-successful-pragmatic-even-if-youre-not-business-savvy 프라그마틱 게임] 슬롯 조작 ([https://brandstrup-vedel.blogbright.net/10-tell-tale-signs-you-need-to-get-a-new-pragmatic-free-trial-slot-buff/ Discover More]) there are a growing number of clinical trials which use the term "pragmatic" either in their abstracts or titles (as defined by MEDLINE however it is neither sensitive nor precise). These terms may signal a greater awareness of pragmatism within abstracts and titles, but it isn't clear whether this is reflected in the content.<br><br>Conclusions<br><br>In recent years, pragmatic trials have been increasing in popularity in research because the value of real-world evidence is becoming increasingly acknowledged. They are randomized clinical trials which compare real-world treatment options rather than experimental treatments under development. They have patient populations that more closely mirror those treated in routine care, they use comparators which exist in routine practice (e.g. existing medications), and they depend on participants' self-reports of outcomes. This method is able to overcome the limitations of observational research, for example, the biases that come with the reliance on volunteers, and the limited availability and codes that vary in national registers.<br><br>Other advantages of pragmatic trials are the ability to use existing data sources, as well as a higher probability of detecting significant changes than traditional trials. However, pragmatic trials may be prone to limitations that compromise their credibility and generalizability. For example,  [https://algowiki.win/wiki/Post:The_History_Of_Pragmatic_Korea 프라그마틱 데모] participation rates in some trials could be lower than anticipated due to the healthy-volunteer effect as well as financial incentives or competition for participants from other research studies (e.g., industry trials). The requirement to recruit participants quickly restricts the sample size and the impact of many pragmatic trials. Additionally certain pragmatic trials don't have controls to ensure that the observed differences are not due to biases in the conduct of trials.<br><br>The authors of the Pragmatic Free Trial Meta identified 48 RCTs that self-described themselves as pragmatist and published from 2022. They evaluated pragmatism using the PRECIS-2 tool, which includes the eligibility criteria for domains and recruitment criteria, as well as flexibility in adherence to intervention, and follow-up. They discovered that 14 of these trials scored pragmatic or highly practical (i.e. scores of 5 or more) in one or more of these domains, and that the majority were single-center.<br><br>Trials with high pragmatism scores are likely to have more criteria for eligibility than conventional RCTs. They also include populations from various hospitals. These characteristics, according to the authors, may make pragmatic trials more relevant and useful in everyday clinical. However they do not ensure that a study is free of bias. Furthermore, the pragmatism of a trial is not a predetermined characteristic and a pragmatic trial that does not have all the characteristics of a explanatory trial can yield valuable and reliable results.

Revision as of 04:00, 27 December 2024

Pragmatic Free Trial Meta

Pragmatic Free Trail Meta is an open data platform that allows research into pragmatic trials. It collects and shares cleaned trial data and ratings using PRECIS-2, permitting multiple and varied meta-epidemiological studies that compare treatment effects estimates across trials with different levels of pragmatism as well as other design features.

Background

Pragmatic studies provide real-world evidence that can be used to make clinical decisions. The term "pragmatic" however, is a word that is often used in contradiction and its definition and assessment need further clarification. Pragmatic trials should be designed to guide clinical practice and policy decisions, not to confirm a physiological or clinical hypothesis. A pragmatic study should strive to be as close as is possible to real-world clinical practices that include recruiting participants, setting, design, implementation and delivery of interventions, determining and analysis outcomes, and primary analyses. This is a major difference between explanatory trials as described by Schwartz and Lellouch1 which are designed to test the hypothesis in a more thorough way.

Truely pragmatic trials should not conceal participants or the clinicians. This can result in bias in the estimations of the effects of treatment. Pragmatic trials should also seek to attract patients from a variety of health care settings so that their results are generalizable to the real world.

Finally, pragmatic trials must concentrate on outcomes that are important to patients, such as the quality of life and functional recovery. This is especially important for trials involving the use of invasive procedures or potential for dangerous adverse events. The CRASH trial29, for instance was focused on functional outcomes to evaluate a two-page case report with an electronic system to monitor the health of patients admitted to hospitals with chronic heart failure. In addition, the catheter trial28 focused on urinary tract infections that are symptomatic of catheters as its primary outcome.

In addition to these features pragmatic trials should reduce the trial's procedures and data collection requirements to reduce costs. Finally, pragmatic trials should seek to make their results as applicable to clinical practice as they can by ensuring that their primary analysis follows the intention-to treat approach (as described in CONSORT extensions for pragmatic trials).

Despite these guidelines however, a large number of RCTs with features that defy the concept of pragmatism have been mislabeled as pragmatic and published in journals of all types. This can lead to false claims of pragmaticity, and the use of the term should be standardized. The development of the PRECIS-2 tool, which provides an objective and standard assessment of practical features is a great first step.

Methods

In a pragmatic study it is the intention to inform policy or clinical decisions by showing how an intervention could be integrated into routine treatment in real-world situations. Explanatory trials test hypotheses concerning the causal-effect relationship in idealized conditions. Therefore, pragmatic trials could have less internal validity than explanatory trials and may be more susceptible to bias in their design, conduct and analysis. Despite these limitations, pragmatic trials can be a valuable source of information for 프라그마틱 카지노 decision-making in healthcare.

The PRECIS-2 tool measures the degree of pragmatism within an RCT by scoring it across 9 domains ranging from 1 (very explicit) to 5 (very pragmatic). In this study the areas of recruitment, organisation, flexibility in delivery, flexible adherence and follow-up were awarded high scores. However, the principal outcome and method of missing data was scored below the pragmatic limit. This suggests that a trial could be designed with effective practical features, yet not harming the quality of the trial.

It is hard to determine the degree of pragmatism within a specific trial because pragmatism does not possess a specific characteristic. Some aspects of a study can be more pragmatic than others. Additionally, logistical or protocol changes during the trial may alter its score on pragmatism. In addition 36% of 89 pragmatic trials identified by Koppenaal et al were placebo-controlled or conducted prior to approval and a majority of them were single-center. They are not close to the norm, and can only be referred to as pragmatic if their sponsors accept that such trials aren't blinded.

A common aspect of pragmatic research is that researchers try to make their findings more meaningful by analyzing subgroups of the trial sample. However, this often leads to unbalanced comparisons and lower statistical power, thereby increasing the chance of not or misinterpreting the results of the primary outcome. In the case of the pragmatic studies included in this meta-analysis, this was a significant problem because the secondary outcomes weren't adjusted for differences in baseline covariates.

In addition the pragmatic trials may be a challenge in the collection and interpretation of safety data. This is due to the fact that adverse events are generally reported by the participants themselves and prone to reporting delays, inaccuracies or coding errors. It is crucial to improve the quality and accuracy of the results in these trials.

Results

While the definition of pragmatism does not require that all clinical trials are 100% pragmatic there are benefits when incorporating pragmatic components into trials. These include:

Increasing sensitivity to real-world issues, reducing cost and size of the study, and enabling the trial results to be faster transferred into real-world clinical practice (by including routine patients). However, pragmatic studies can also have disadvantages. The right type of heterogeneity, for example could allow a study to expand its findings to different settings or patients. However, the wrong type can decrease the sensitivity of the test, and therefore lessen the power of a trial to detect even minor effects of treatment.

A variety of studies have attempted to categorize pragmatic trials using various definitions and scoring methods. Schwartz and Lellouch1 have developed a framework that can discern between explanation-based studies that confirm the physiological hypothesis or clinical hypothesis and pragmatic studies that inform the choice for appropriate therapies in clinical practice. Their framework comprised nine domains that were scored on a scale ranging from 1 to 5 with 1 indicating more explanatory and 5 indicating more practical. The domains covered recruitment of intervention, setting up, delivery of intervention, flexible compliance and primary analysis.

The initial PRECIS tool3 included similar domains and an assessment scale ranging from 1 to 5. Koppenaal et al10 created an adaptation of this assessment called the Pragmascope that was easier to use in systematic reviews. They discovered that pragmatic reviews scored higher in most domains, but scored lower in the primary analysis domain.

The difference in the primary analysis domains could be explained by the way that most pragmatic trials analyze data. Some explanatory trials, however do not. The overall score was lower for pragmatic systematic reviews when the domains on organisation, flexible delivery and follow-up were merged.

It is crucial to keep in mind that a pragmatic study should not necessarily mean a low-quality study. In fact, 프라그마틱 게임 슬롯 조작 (Discover More) there are a growing number of clinical trials which use the term "pragmatic" either in their abstracts or titles (as defined by MEDLINE however it is neither sensitive nor precise). These terms may signal a greater awareness of pragmatism within abstracts and titles, but it isn't clear whether this is reflected in the content.

Conclusions

In recent years, pragmatic trials have been increasing in popularity in research because the value of real-world evidence is becoming increasingly acknowledged. They are randomized clinical trials which compare real-world treatment options rather than experimental treatments under development. They have patient populations that more closely mirror those treated in routine care, they use comparators which exist in routine practice (e.g. existing medications), and they depend on participants' self-reports of outcomes. This method is able to overcome the limitations of observational research, for example, the biases that come with the reliance on volunteers, and the limited availability and codes that vary in national registers.

Other advantages of pragmatic trials are the ability to use existing data sources, as well as a higher probability of detecting significant changes than traditional trials. However, pragmatic trials may be prone to limitations that compromise their credibility and generalizability. For example, 프라그마틱 데모 participation rates in some trials could be lower than anticipated due to the healthy-volunteer effect as well as financial incentives or competition for participants from other research studies (e.g., industry trials). The requirement to recruit participants quickly restricts the sample size and the impact of many pragmatic trials. Additionally certain pragmatic trials don't have controls to ensure that the observed differences are not due to biases in the conduct of trials.

The authors of the Pragmatic Free Trial Meta identified 48 RCTs that self-described themselves as pragmatist and published from 2022. They evaluated pragmatism using the PRECIS-2 tool, which includes the eligibility criteria for domains and recruitment criteria, as well as flexibility in adherence to intervention, and follow-up. They discovered that 14 of these trials scored pragmatic or highly practical (i.e. scores of 5 or more) in one or more of these domains, and that the majority were single-center.

Trials with high pragmatism scores are likely to have more criteria for eligibility than conventional RCTs. They also include populations from various hospitals. These characteristics, according to the authors, may make pragmatic trials more relevant and useful in everyday clinical. However they do not ensure that a study is free of bias. Furthermore, the pragmatism of a trial is not a predetermined characteristic and a pragmatic trial that does not have all the characteristics of a explanatory trial can yield valuable and reliable results.