* Distances have varied as follows: 60 yards hurdles (1965-86), 55 m hurdles (1987-90), 50 m hurdles (1933-41, 1948), 50 yards hurdles (1928-32, 1945-46, 1949-54, 1957-58, 1964), 80 m hurdles (1955), 70 yards hurdles (1956, 1959-63). From 1965-68, there were 4 hurdles instead of 5 hurdles other years.