Mean (SD) values of pretreatment group characteristics and mean scores (SD) on the UPDRS and stage of disease for the LSVT® and RET groups before and 24 months after treatment
| LSVT® (n=21) | RET (n=12) | |||
| Age (y) | 61.3 (11.4) | 63.3 (7.1) | ||
| Time since diagnosis (y) | 7.2 (5.4) | 5.0 (4.6) | ||
| Speech severity rating1-150 | 1.2 (1.2) | 1.7 (1.9) | ||
| Voice severity rating1-150 | 2.5 (1.1) | 2.3 (1.1) | ||
| Before | 24 m FU | Before | 24 m FU | |
| UPDRS | 27.7 (12.0) | 29.2 (15.1) | 12.9 (12.4) | 19.2 (18.3) |
| Stage | 2.6 (0.6) | 2.7 (0.7) | 2.2 (0.9) | 2.4 (1.0) |
↵1-150 Speech and voice severity scale: 1=mild; 2=mild-moderate; 3=moderate, 4=moderate-severe; 5=severe. LSVT®=Lee Silverman voice treatment; RET=respiratory effort treatment.; 24 m FU=24 month follow up.