Results of two earlier studies have shown that around 40 percent of patients who stay on Acomplia for a year lose more than 10 percent of their body weight. The drug also boosts levels of "good" HDL cholesterol in the blood<<
----------------- What's odd is that the earlier Reuters story says that "around" 40% of patients lost more than 10% of their body weight after one year, yet the story you quote says that only ("nearly") 33% of the patients on the drug for two years lost more than 10% of their body weight.
I also suspect that reporting the percentage of body weight lost may be better than measuring inches (or centimeters) lost around the waistline, especially if the latter isn't given as a percentage of the initial measurement.