The mean changes ( improvements ) in the primary outcome measures were as follows : Lysholm score , @ points in the partial-meniscectomy group as compared with @ points in the sham-surgery group ( between-group difference , -@ points ; @ % confidence interval -LSB- CI -RSB- , -@ to @ ) ; WOMET score , @ and @ points , respectively ( between-group difference , -@ points ; @ % CI , -@ to @ ) ; and score for knee pain after exercise , @ and @ points , respectively ( between-group difference , -@ ; @ % CI , -@ to @ ) .