> The Pennsylvania researchers tracked 1,741 middle aged volunteers who completed a questionnaire on their sleep history, underwent a physical exam and were monitored overnight in a sleep laboratory. The death rate exceeded 50 percent for men with chronic insomnia, compared with 9.1 percent of those who slept well, after researchers adjusted for differences such as weight and smoking habits.

Huh? 9% of the normal men died, and half of those with insomnia? How long did they follow them for?