Intelligence test at preschool-age predicts reading difficulty among school-aged very low birth weight infants in Japan

Akihito Takeuchi, Tatsuya Ogino, Tatsuya Koeda, Makio Oka, Takashi Yorifuji, Toshimitsu Takayanagi, Kazuo Sato, Noriko Sugino, Motoki Bonno, Makoto Nakamura, Misao Kageyama

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Abstract

Objective: To elucidate whether the results of an intelligence test at preschool age are predictive of reading difficulty (RD) at school age among very low birth weight infants (VLBWI). Methods: Subjects were 48 Japanese children whose birth weight was <1500 g and who regularly visited a follow-up clinic. All subjects completed the Wechsler Intelligence Scale for Children-III (WISC-III) during the last grade of kindergarten, and four reading tasks during the second to fourth grade of elementary school. All participants had a full-scale intelligence quotient score of 85 or higher. Subjects with a standard deviation reading time score greater than 2.0 in two or more tasks were considered to have RD. We evaluated the associations between each WISC-III score and RD using logistic regression analyses. Furthermore, we performed receiver operating characteristic (ROC) analysis to determine a cutoff WISC-III score predictive of RD. Results: In the mutually-adjusted model, the adjusted odds ratio per 1 score increase of freedom from distractibility (FD) was 0.832 (95% confidence interval: 0.720–0.962). In the ROC analysis, an FD score of <95.5 was chosen as the cutoff value for predicting RD (sensitivity, 0.77; specificity, 0.74). Conclusion: The present study indicated that a lower FD score at preschool age, which was associated with deficits in verbal working memory and attention, is a risk factor for RD at school age among Japanese VLBWI. Further investigation is desired to clarify the cognitive deficits underlying RD in Japanese-speaking preterm children, and to establish appropriate interventions for these children.

Original languageEnglish
Pages (from-to)735-742
Number of pages8
JournalBrain and Development
Volume40
Issue number9
DOIs
Publication statusPublished - Oct 2018

Keywords

  • Attention
  • Dyslexia
  • Japanese
  • Preterm
  • Reading difficulty
  • VLBW
  • Verbal working memory
  • Very low birth weight infant

ASJC Scopus subject areas

  • Pediatrics, Perinatology, and Child Health
  • Developmental Neuroscience
  • Clinical Neurology

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    Takeuchi, A., Ogino, T., Koeda, T., Oka, M., Yorifuji, T., Takayanagi, T., Sato, K., Sugino, N., Bonno, M., Nakamura, M., & Kageyama, M. (2018). Intelligence test at preschool-age predicts reading difficulty among school-aged very low birth weight infants in Japan. Brain and Development, 40(9), 735-742. https://doi.org/10.1016/j.braindev.2018.05.002