Abstract
The aim of this population-based study is to investigate IQ and IQ-related factors in children with hydrocephalus (HC). Psychometric intelligence was assessed in subjects below the age of 7.3 years (N=52, F=18, M=34) with the Wechsler Preschool and Primary Scale of Intelligence – Revised (WPPSI-R) and for children above the age of 7.3 years (N=29, F=6, M=23) with the Wechsler Intelligence Scale for Children – Revised (WISC-R). The controls were matched according to age, gender, and geographic variables. All children were living in western Norway. 57 children had infantile HC (IH) and 24 had childhood HC (CH). Children with myelomeningocele (MMC), traumatic brain injury (TBI), or intracranial tumours were excluded. IQ levels were found to be significantly higher in the control group than in the HC groups. The Kaufman factors showed a similar pattern, with lowest values in IH, and CH intermediate between IH and NC. The results demonstrate that HC affects IQ. More specific cognitive profiles, such as non-verbal learning disabilities, are not detectable when using the Wechsler tests. For this purpose, other tests and models for analyses may be recommended.
Key words
hydrocephalus - psychology - non-verbal communication - neuropsychological tests
References
-
1
Anon
.SPSS for Windows, Rel. 14.0.1 Chicago: SPSS Inc 18 Nov 2005
-
2
Anon
.Stata/SE 9.2 for Windows. College Station: StataCorp LP 2007
-
3
Dalen K, Bruarøy S, Wentzel-Larsen T. et al .
Nonverbal learning disabilities in children with infantile hydrocephalus, aged 4–7 years. A population based, controlled study.
Neuropediatrics.
2006;
37
1-5
-
4
Del Bigio MR.
Neuropathological changes caused by hydrocephalus.
Acta Neuropathol (Berl).
1993;
85
573-585
-
5
Dennis M, Fitz CR, Netley CT. et al .
The intelligence of hydrocephalic children.
Arch Neurol-Chicago.
1981;
38
607-615
-
6
ISI Web of Knowledge
.
Science Citation Index Expanded; Retrieved May 22nd.
2007;
-
7 Kaufman AS. Intelligent testing with the WISC-R. New York: Wiley 1979
-
8 Korkman M, Kirk U, Kemp S.
NEPSY
.A developmental neuropsychological assessment. Manual. San Antonio: The Psychological Corporation 1998
-
9
Op Heij CP, Renier WO, Gabreels FJ.
Intellectual sequelae of primary non-obstructive hydrocephalus in infancy: analysis of 50 cases.
Clin Neurol Neurosurg.
1985;
87
247-253
-
10
Richardson JT.
Memory and intelligence following spontaneously arrested congenital hydrocephalus.
Br J Soc Clin Psychol.
1978;
17
261-267
-
11 Rourke BP. Neuropsychological Assessment of Children with Learning Disabilities: Measurement Issues. In: Frames of Reference for the Assessment of Learning Disabilities: New Views on Measurement Issues, Reid Lyons G, ed. Baltimore, MD: Paul H. Brooks 1994: 475-509
-
12 Rourke BP. Introduction: The NLD syndrome and the white matter model. In: Syndrome of nonverbal learning disabilities, Rourke BP, ed. New York: The Guilford Press 1995: 1-26
-
13
Shurtleff DB, Foltz EL, Loeser JD.
Hydrocephalus. A definition of its progression and relationship to intellectual function, diagnosis, and complications.
Arch Dis Child.
1973;
125
688-693
-
14
The Psychological Corporation
.Wechsler Preschool and Primary Scale of Intelligence– Revised: Harcourt Brace Jovanovich 1989
-
15
Yudkin PL, Aboualfa M, Eyre JA. et al .
Influence of elective preterm delivery on birthweight and head circumference standards.
Arch Dis Child.
1987;
62
24-29
Correspondence
K. Dalen
Department of Biological and Medical Psychology
University of Bergen
Jonas Liesvei 91
N-5009 Bergen
Norway
Phone: +47/55 58 62 17
Fax: +47/55 58 98 73
Email: knut.dalen@psych.uib.no
