In 1980, a special edition of the World Championships was staged in Sittard, holding events not yet on the Olympic programme. Broschat won the 400 m hurdles ahead of compatriots Ellen Neumann and Petra Pfaff. Her winning time of 54.55 seconds was a career best time. This ranks her tenth among German 400 m hurdlers, behind Sabine Busch, Cornelia Ullrich, Ellen Fiedler, Heike Meißner, Gudrun Abt, Silvia Rieger, Susanne Losch, Karin Roßley and Petra Krug.