Nurse-visited children were less likely to be classified as having total emotional/behavioral problems at age 6 years ( relative risk [ RR ] = 0.45 , P = .08 ) , internalizing problems at age 9 years ( RR = 0.44 , P = .08 ) , and dysfunctional attention at age 9 years ( RR = 0.34 , P = .07 ) .