Sodium intake < 2300 mg/d was associated with a lower risk of all-cause mortality : 48 % ( HR : 0.52 ; 95 % CI : 0.30 , 0.91 ; P = 0.02 ) and 49 % ( HR : 0.51 ; 95 % CI : 0.26 , 0.98 ; P = 0.04 ) after 1 and 3 y , respectively .