A study of was done comparing the performance of swimming competitors at the 1984 Summer Paralympics. It found there was no significant difference in performance in times between women in A4, A5 and A6 the 100 meter 100 meter freestyle, men in A4 and A5 in the 100 meter freestyle, men in A5 and A6 in the 100 meter freestyle, women in A5 and A6 in the 50 meter butterfly, women in A4, A5 and A6 in the 4 x 50 meter individual medley, men in A5 and A6 in the 4 x 50 meter individual medley, and men and women in A4, A5 and A6 in the 100 meter backstroke.