o Ex: Every 3 gets higher dose
• Nonrandomized: All with Hep. C = cases; others = controls
• Protocol: Study design - instructions
• Blinded: Participants do not know if in experimental or control group
clinicaltrials临床试验方案
5
Another Classification System
• rected Data Capture
• Ex: Vital Statistics
• Directed Data Capture & Hypothesis Testing
• Ex: Cohort Studies, Case Control Studies
developed a systematic methodology for studying & evaluating therapeutic interventions
clinicaltrials临床试验方案
11
Core Components of Clinical Trials
• Involve human subjects • Move forward in time • Most have a comparison CONTROL group • Must have method to measure intervention • Focus on unknowns: effect of medication • Must be done before medication is part of