Yahoo! News - Study Participants Want to Know the Results: "People who participate in clinical studies are interested in how the trials turn out, results of a small pilot study suggest. "

WOW! It goes on to say (hold on to your hat):

Partridge [lead author of the study], at the Dana-Farber Cancer Institute in Boston, and colleagues offered to tell patients who had participated in a study of surgery for early breast cancer about the outcomes. Out of 135 participants, 117 wanted to learn the results.

Can you imagine taking part in a cancer study (filling out all the extra paperwork, having experimental treatment etc.) and then NOT wanting to know the results? Perhaps the 18 participants who 'did not want to learn the results' had actually passed on to a better place - perhaps a place where people running studies aren't idiots.