- .61). The initial reduction in AP was maintained over time for the improved group; however, the initial reduction in HED was not maintained over the long-term. When followed-up at 15 months post intervention, the improved group reported lower levels of AP, but not HED, compared to their baseline levels. The non-improved group did not improve in HED or AP over the long-term. They had higher levels of HED and AP than the improved group at all times, and the only positive outcome for this group was the initial reduction in AP from baseline to the 4-month follow up.