There was a better improvement in patients who underwent hydrotherapy than in patients treated with land-based therapy in the centre of pressure sway area closed eyes ( mean SD change : @ SD@ @ vs. @ SD@ @ , p = @ ) , Berg Balance Scale ( @ SD@ @ vs. @ SD@ @ , p = @ ) , Activities-specific Balance Confidence Scale ( @ SD@ @ vs. @ SD@ @ , p = @ ) , Falls Efficacy Scale ( -@ SD@ @ vs. -@ SD@ @ , p = @ ) , Parkinson 's Disease Quetionnaire-@ ( -@ SD@ @ vs. -@ SD@ @ , p = @ ) and falls diary ( -@ SD@ @ vs. -@ SD@ @ , p = @ ) .