Residual geometric mean albuminuria with baseline treatment was @ mg per day ( @ % CI @-@ ) ; it was significantly reduced by sodium restriction ( @ mg per day -LSB- @-@ -RSB- , p = @ ) , by hydrochlorothiazide ( @ mg per day -LSB- @-@ -RSB- , p = @ ) , and to the greatest extent by their combination ( @ mg per day -LSB- @-@ -RSB- , p < @ ) .