The PhenX Toolkit presents the measures and protocols selected by the working groups (https://www.phenxtoolkit.org/). Users can search or browse the Toolkit, selecting measures of interest by adding them to a cart. From the cart, the user can request reports that provide the information needed to collect data on the measures. The Toolkit provides a description of the measure, detailed protocols associated with the measure, and other related information: for example, rationale for selection, equipment and training required, and references. The Steering Committee envisioned the first few domains as building blocks for the entire PhenX Toolkit. Thus, Demographics, Anthropometrics, and Alcohol, Tobacco and Other Substances were selected as the first 3 domains to be addressed by working groups. With this approach, subsequent working groups, such as the Cancer or Diabetes working group, can review measures already in the Toolkit and then decide whether they are sufficient for their research domain. Setup of the initial 21 domains was completed near the end of 2010, and the selected measures are all available in the PhenX Toolkit.
