ACT Statistical Guidance

Introduction

Welcome to the ACT Statisticians Working Group website. This site is meant to be a source of helpful information for anyone analyzing or thinking about analyzing data from the Adult Changes in Thought (ACT) study. We also provide a way for you to contact us with your questions.

ACT Statistical Guidance documents

The ACT data have a few complexities for which an analyst may appreciate some guidance, which is informed by statisticians who have a more intimate knowledge of the data generation and/or regularly have addressed these issues in analyses of ACT data.

  1. Weighting methods to handle selection bias due to missing data
  2. Generation of item response theory (IRT) based CASI scores
  3. A review paper for methods to analyze the 24-hour activity cycle data, which includes a supplemental appendix

For more information about the ACT study, including data query tools, data documentation, and other study documents visit https://www.ACTagingresearch.org.


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