highly significantP < 0.001
Near add power requirements decreased significantly in both groups, from 1.34 ± 0.33 DS to 0.95 ± 0.24 DS in Group A (29.7% reduction) and from 1.36 ± 0.38 DS to 0.84 ± 0.25 DS in Group B (37.8% reduction), with the between-group difference being highly significant ( P < 0.001).