highly significantP <.001
Improvement over all groups from baseline to 3 months was highly significant on all three dependent variables: PDA, F 1,149 =160.93, P <.001, with the mean PDA increasing from 44% to 72%; DDD, F 1,149 =61.73, P <.001, with the mean decreasing from 8.0 to 4.6; and InDUC, F 1,149 =122.28, P <.001, with the overall mean decreasing from 40.8 to 19.5.