Significant differences were found between the pre - and post-operative levels of serum sodium and hemoglobin in the TURP group ( -LSB- @ + / - @ -RSB- vs -LSB- @ + / - @ -RSB- mmol/L , P < @ ; -LSB- @ + / - @ -RSB- vs -LSB- @ + / - @ -RSB- g/L , P < @ ) , but not in the TUERP group .