The research and consulting firm canvassed 1,300 CEOs at the conference, and found that 17 percent thought that growth prospects were poor in 2015, up from 7 percent in the previous year.
About half of those surveyed thought that growth would be steady, and only 33 percent thought that conditions would improve this year.
The most important market for a majority of CEOs was the U.S., followed by China. This is a change from recent previous years in which China was seen as the most important market for a majority of CEOs.
Economic growth is the first topic on the agenda at the conference.