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Buitendijk, S.E. (author), Verkerk, P.H. (author), Verloove-Vanhorick, S.P. (author), TNO Preventie en Gezondheid (author)
article 1993
document
Reerink, J.D. (author), Herngreen, W.P. (author), Verkerk, P.H. (author), Ruys, J.H. (author), Verloove-Vanhorick, S.P. (author), TNO Preventie en Gezondheid (author)
article 1993
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Verkerk, P.H. (author), Derksen-Lubsen, G. (author), Vulsma, T. (author), Loeber, J.G. (author), de Vijlder, J.J.M. (author), Verbrugge, H.P. (author), Nederlands Instituut voor Praeventieve Gezondheidszorg TNO (author)
Doel. Evaluatie van de Nederlandse screening op congenitale hypothyreoïdie (CHT). Opzet. Descriptief. Plaats. Landelijk. Methoden. Gegevens over de screening in de periode 1 januari 1981-31 december 1990 werden verkregen van de entadministraties, van laboratoria en van kinderartsen naar wie kinderen met afwijkende uitslagen verwezen werden....
article 1993
document
Verkerk, P.H. (author), Buitendijk, S.E. (author), Nederlands Instituut voor Praeventieve Gezondheidszorg TNO (author)
It is generally believed that non-differential misclassification will lead to a bias toward the null-value. However, using one graphical and one numerical example, we show that in situations where underestimation more than overestimation is the problem, non-differential misclassification may lead to a bias away from the null-value for...
article 1992
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Verkerk, P.H. (author), Vaandrager, G.J. (author), Sengers, R.C.A. (author)
In the period 1st September 1974 to 1st Januari 1989 2,511,000 infants (99.3 of all livebirths) were screened for PKU. Treatment was required in 158 of the 330 referred infants. The diagnosis of these 158 patients was PKU (137), hyperphenylalaninaemia (HPA) (19) and malignant HPA (2). Three cases had a false-negative screening result. The...
article 1990
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