Research Flashcards
Evidence based practice
Occupational practices ought to be based on scientific evidence
Providing the most effective care available with aim of improving patient outcomes
3 intersecting components of evidence based practice
Evidence, Clinical Experience, Patient’s Expectations
Evidence in evidence based practice comes from
clinical research - literature searching, application of formal rules of evidence evaluation
NOT intuition, unsystematic clinical experience, or pathophysiologic rationale
Is intuition permitted in practice
Yes; it should be balanced with aspects of evidence based practice.
Importance of evidence based care x 3
1 sound decision making
2 minimize risk to ptnt (benefit>harm)
3 evaluate literature and practice
4 expose gaps in literature
5 confident interaction with other professionals
6 ptnt receives care that fits their needs
Aspects of pedorthic practice influenced by evidence based practice
Assessment findings
Testing
Treatment
Prevention
Evidence
Knowledge from a variety of sources that has been found to be credible
Balance of empirical and experiential evidence; academic articles, expert opinion, clinical experience
Proof process
Burden of proof on person making claim; burden on paper presenter; defend thesis against challenges from panel of judges
Hypothesis rejected / refuted
Evidence contrary to predicted expectations
Rule for evidence collection used by science
Collected systemically in attempt to avoid bias
Cornerstone of evidence based medicine
Hierarchical levels of evidence
Levels of evidence x6
Systematic reviews / meta analysis (top level), Randomized controlled trials, Cohort studies, Case controlled studies, Case series / case reports, Editorial / Expert opinion (bottom)
Assigning level of evidence
assigned to studies based on methodological quality of their design, validity, and applicability to patient cases
Selection of evidence-based information
Select the highest level of evidence possible (ideally systematic reviews / meta analysis)
Filtered information
Has been critically appraised (e.g. systematic reviews / meta analysis)
Meta-analysis
Systematic review using quantitative methods to summarize results, such as by pooling data to determine influence on statistical power
Systematic review
Study composed of systematic searches to appraise and summarize all medical literature on a specific topic (narrative or qualitative review)
Randomized controlled trials
Randomized groups: experimental and control. Followed for variables and outcomes of interest. Rigorous study design.
Cohort study
Non-randomized groups: one with variable of interest, one without. Follow groups to measure outcome.
Case-controlled study
Patients with outcome of interest and control patients with same outcome; identify exposure
Case series / case reports
Uncontrolled studies; outcome measure often not reported; possible confounding factors
Editorial / expert opinion
Purely anecdotal evidence
Non empirical evidence x3
Clinical experience,
‘n of one’ evidence gathered from patients,
Theory (non-research based)
Often lead to research; bottom of hierarchy
Finding good evidence: research question
Develop a good research question with PICO: population, intervention, control, outcome measures
Finding good evidence: Boolean operators
And = results containing both categories
Or = results containing both categories and results for each category alone
Not = one category is completely excluded from results
3 conclusions of article critical appraisal
1 discard completely (flawed)
2 interpret with caution (questionable)
3 assimilate into practice (trustworthy)
5 questions for article critical appraisal
1 originality 2 who 3 study design 4 bias 5 size, follow-up
Reliability of findings
CONSISTENCY
extent to which outcomes are consistent when method repeated; quality of research
Validity of findings
ACCURACY
the extent to which the instruments or methods used are measuring what they are intended to measure; quality of research
2 ways to consider quality of research
reliability + validity
3 common bias types in clinical research
confounding variables
selection bias
measurement bias
confounding variable
factor that influences the intervention and/or control group causing a suspicious association; influences outcome
measurement bias
instrument or calibration is not rigorously controlled
ROBIS
tool for BIAS risk assessment
AMSTAR
tool for assessing METHODOLOGICAL QUALITY