At followup ( controls : @ months ; mannitol : @ months ) , there were no differences between creatinine or creatinine clearance ( creatinine : controls -LSB- n = @ -RSB- ; @ -LSB- CI@ % @-@ @ -RSB- v mannitol -LSB- n = @ -RSB- ; @ -LSB- CI@ % : @-@ @ -RSB- ) .