Mean mental processing composite ( equivalent to IQ ) at 5years were 94 ( SD 16 ) compared with 95 ( SD 15 ) , respectively ( difference in means -1 ( 95 % CI -6 to 4 ) , and similar proportions were in receipt of special educational needs support ( 41 % vs 35 % ; risk ratio 1.2 ( 95 % CI 0.8 to 1.9 ) ) .