Journal of Pediatric Psychology, Vol. 27, No. 1, 2002, pp. 77-86
© 2002 Society of Pediatric Psychology
Disentangling the Effects of Current Age, Onset Age, and Disease Duration: Parent and Child Attitudes Toward Diabetes as an Exemplar
University of Florida Health Science Center
All correspondence should be sent to Suzanne Bennett Johnson, Center for Pediatric Psychology and Family Studies, University of Florida Health Science Center, P.O. Box 100165, Gainesville, Florida 32610-0165. E-mail: sjohnson{at}hp.ufl.edu .
Objective: To develop a methodology for use with cross-sectional data to disentangle the effects of current age, disease onset age, and disease duration in chronically ill children.
Methods: We used a questionnaire data set from a large cross-sectional sample of mothers and children with Type 1 diabetes. The interdependence of current age, onset age, and disease duration precluded use of all three in the same regression model. Consequently, pairs of models were run, looking for a pattern in the results.
Results: The approach successfully disentangled the differential effects of the child's current age, disease onset age, and disease duration. Child current age predicted child attitudes about diabetes management rules, child sick-role identification, and maternal attitudes toward medical staff. Onset age predicted childperceived family disruption and mothers' confidence in detecting a hypoglycemic reaction. Disease duration predicted maternal religious beliefs about diabetes and maternal attitudes toward medical staff.
Conclusions: This study illustrates a methodology for disentangling the effects of child current age, disease onset age, and disease duration in cross-sectional data that may be useful for any childhood chronically ill population that varies in child onset age.
Key words: Type 1 diabetes; patient and parent attitudes; child age; onset age; disease duration.
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