study design_1 - STUDY DESIGN DR MUHAMMAD TAREQUE HASAN TEACHING ASSISTANT DEPARTMENT OF EPIDEMIOLOGY BANGLADESH UNIVERSITY OF HEALTH SCIENCE

study design_1 - STUDY DESIGN DR MUHAMMAD TAREQUE HASAN...

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STUDY DESIGN DR. MUHAMMAD TAREQUE HASAN TEACHING ASSISTANT DEPARTMENT OF EPIDEMIOLOGY BANGLADESH UNIVERSITY OF HEALTH SCIENCE
QUANTITATIVE DESIGNS Prediction Survey/questionnaires Existing frameworks Numerical Theory testing (experimental) Sample size core issue in reliability of data Objective Data analysis: parametric, non-parametric
QUALITATIVE DESIGNS Understanding Interview/observation Discovering frameworks Textual (words) Theory generating Quality of informant more important than sample size Subjective Embedded knowledge Data analysis: fidelity to text or words of interviewees
QUALITATIVE DESIGN Methods - Focus Groups - Interviews - Surveys - Self-reports - Observations - Document analysis Sampling : Purposive Quality Assurance: - Trustworthiness (Credibility, Confirmability, Dependability, Transferability) - Authenticity (Fairness, Ontological, Educative, Tactical, Catalytic)
QUANTITATIVE DESIGN Methods Observational Experimental Mixed Sampling : Random (simple, stratified, cluster, etc) or purposive Quality Assurance : Reliability: Internal and External Validity : Construct, Content, Face
ELEMENTS OF STUDY DESIGN Measurement accuracy (variables) Effects can only be guessed relative to baseline (provided by a control group) Experimental studies differ from non-experimental studies The unit of recorded measure - individual or aggregate (ecological) Measurements may be longitudinal in individuals over time Cohort or case-control samples
ELEMENTS OF STUDY DESIGN Hypothesis testing (“analytic”) or hypothesis generating (“descriptive”) studies Is the exposure randomized?

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