There was no improvement in pain intensity at @-week , @-month , or @-year follow-up ( between-group difference , -@ -LSB- @ % CI , -@ to @ -RSB- at @-week follow-up ; -@ -LSB- @ % CI , -@ to @ -RSB- at @-month follow-up ; and -@ -LSB- @ % CI , -@ to @ -RSB- at @-year follow-up ) .