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Quality Control in Clinical Trials

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E. Exam<strong>in</strong>e frequency distributions<br />

periodically to identify aberrant values or<br />

less than expected degree of variability<br />

F. Credos<br />

1. <strong>Quality</strong> control problems will occur.<br />

a. Have a system <strong>in</strong> place that will<br />

identify them<br />

b. Fix them as early as possible<br />

2. Data which are collected without any<br />

ongo<strong>in</strong>g quality checks are best left<br />

uncollected

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