The lower the number, the greater the impact the impairment was on an athlete's ability to compete.
Winners and runners-up of each group qualified for the knock-out stage.
In this edition of the Games, no bronze medal match was held.
Losers of each semifinal were automatically awarded a bronze medal.
Ian Seidenfeld of the United States beat the defending champion, Peter Rosenmeier of Denmark, in the gold medal match.