Quality Control in Clinical Trials
Quality Control in Clinical Trials
Quality Control in Clinical Trials
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6. Questionnaire to check on efficacy of<br />
mask<strong>in</strong>g at end of study<br />
7. Protocol violations which are<br />
differential by treatment group<br />
8. Differences <strong>in</strong> variance of read<strong>in</strong>gs by<br />
treatment group<br />
D. "Correction" for bias<br />
1. No method of adjustment available<br />
2. Early detection important<br />
3. Purg<strong>in</strong>g of data may be necessary
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