A total of @ centrally obese men and women , with a mean ( range ) age of @ y ( @-@ y ) , body mass index ( in kg/m ( @ ) ) of @ ( @-@ @ ) , and waist circumference of @ cm ( @-@ cm ) were randomly assigned to receive either the NND ( high in fruit , vegetables , whole grains , and fish ) or an average Danish diet ( ADD ) for @ wk .