Model selection and prediction of outcomes in recent onset schizophrenia patients who undergo cognitive training

Ian S. Ramsay, Sisi Ma, Melissa Fisher, Rachel L. Loewy, J. Daniel Ragland, Tara Niendam, Cameron S. Carter, Sophia Vinogradov

Research output: Contribution to journalArticlepeer-review

36 Scopus citations


Predicting treatment outcomes in psychiatric populations remains a challenge, but is increasingly important in the pursuit of personalized medicine. Patients with schizophrenia have deficits in cognition, and targeted cognitive training (TCT) of auditory processing and working memory has been shown to improve some of these impairments; but little is known about the baseline patient characteristics predictive of cognitive improvement. Here we use a model selection and regression approach called least absolute shrinkage and selection operator (LASSO) to examine predictors of cognitive improvement in response to TCT for patients with recent onset schizophrenia. Forty-three individuals with recent onset schizophrenia randomized to undergo TCT were assessed at baseline on measures of cognition, symptoms, functioning, illness duration, and demographic variables. We carried out 10-fold cross-validation of LASSO for model selection and regression. We followed up on these results using linear models for statistical inference. No individual variable was found to correlate with improvement in global cognition using a Pearson correlation approach, and a linear model including all variables was also found not to be significant. However, the LASSO model identified baseline global cognition, education, and gender in a model predictive of improvement on global cognition following TCT. These findings offer guidelines for personalized approaches to cognitive training for patients with schizophrenia.

Original languageEnglish (US)
Pages (from-to)1-5
Number of pages5
JournalSchizophrenia Research: Cognition
StatePublished - Mar 2018

Bibliographical note

Funding Information:
The current study was funded by the Stanley Medical Research Institute ( 06TAF-972 ). Ian S. Ramsay was funded by the Wells Family Trust (# 17452 ).

Publisher Copyright:
© 2017 The Authors


  • Cognitive training
  • Model selection
  • Regularized regression
  • Schizophrenia


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