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Biotech / Medical : Zonagen (zona) - good buy?
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To: CalculatedRisk who wrote (3815)5/3/1998 12:11:00 AM
From: LoLoLoLita   of 7041
 
Bill,

I can't answer your first question, but crossover is when they switch cohorts between the drug and the placebo.

In a double-blind crossover study, every individual starts with either the drug or a placebo, but neither the subject nor the administering staff know which it is. Crossover occurs when placebo is switched to drug, or vice versa. All individuals are thus evaluated on *both* drug and placebo.

David
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