LETTER TO THE EDITOR |
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We are pleased to see that vanderPloeg et al now agree that our trial showed consistent positive effects for our primary outcome, special school attendance. Our trial was constructed and powered for exactly this purpose (namely, to investigate whether screening for and early treatment of language disorders reduced the attendance at a special school), because children who suffer from severe language problems will not be able to attend normal school but require education at a special school. As a result of earlier detection and treatment, in the Netherlands, 2500 children (of 200000 8-year-olds) per year would be able to remain at a normal school. In a randomized trial of screening, a positive result