Is there a Special move or possibly debug option to force this status during a fight? Some enemies have special abilities that require you to be tripped but I haven't figured out how to let them do it once my evasion gets too high.
A few instances also require a Physique or Reflexes check to avoid being tripped, so in those cases, having low Physique/Reflexes also helps. Low Reflexes will help anyways since all the trip attacks I know of can be evaded, and high Reflexes increases evasion chance.