The rate and incidence of infections in subjects @ days old were significantly increased in the TGC compared with the STD group ( rate : @ versus @ infections per @ cardiac intensive care unit days , P = @ ; incidence : @ % versus @ % , P = @ ) , whereas infections among those > @ days of age were significantly reduced in the TGC compared with the STD group ( rate : @ versus @ infections per @ cardiac intensive care unit days , P = @ ; incidence : @ % versus @ % , P = @ ) ; the interaction of treatment group by age subgroup was highly significant ( P = @ ) .