Development and validation of PHTS specific neurobehavioural evaluation tools

Introduction

PHTS can affect people in different ways, and some people with PHTS have developmental, learning, or behavioural symptoms or autism spectrum disorder (ASD).

Current tools to measure these key behaviours and thinking skills in PHTS were not developed with PHTS in mind, so it can be both complex and time consuming to track symptoms, compare experiences across families, or tell whether an intervention or drug is helping. Any new measures being developed should also be easy to use so they do not cause undue burden on families and individuals with PHTS. Therefore, having tools that can be completed at home over the internet is preferred over those that require travel to a hospital.

Key facts

Project title: Development and Validation of a Neurobehavioural Evaluation Tool for PHTS

Type of study: Clinical outcome measures

Lead researcher: Professor Thomas Frazier

Institution: John Carroll University, Ohio, USA 

Project start: February 2021           Completed: September 2024

Project goals

To develop and validate tools that can assess the broad range of symptoms associated with developmental delay and autism spectrum disorder experienced by some people with PHTS, which can be used in the family home and do not take a long time to complete.

Project overview

In this project, Prof Thomas Frazier’s team developed and validated web-based tools designed specifically for people with PHTS.

One of the tools is a questionnaire that is completed by someone who knows the person with PHTS very well, such as a parent or guardian. The other is a webcam tool which shows researchers how the person with PHTS is performing various tasks. Both of these measures can be completed at home on a normal computer with a webcam, instead of having to go to a hospital appointment.

First the researchers talked to expert PHTS doctors and families to understand the most important problems in PHTS that should be measured by the tools.

Once the tools had been developed and tested, a larger study including 112 pairs of individuals with PHTS and their caregiver took part in a study to test if the new tool captured relevant PHTS symptoms and to confirm that the tool was suitable to use by families at home.

Outcomes

Families from both the UK and US took part. A big thank you to all the families who supported this study as it would not have been possible without your participation!

These tools could help doctors and researchers notice changes earlier, follow progress over time, and understand whether treatments, for example those tested as part of future clinical trials, are making a difference. The tools may also be useful in other conditions that involve similar symptoms and developmental delay.

The following publication have resulted from work associated with this grant:

In 2025 the FDA accepted the NET tool into their Rare Disease Endpoint Advancement Programme (RDEA). As part this, Prof Frazier, together with PTEN Research, will have the opportunity meet with the FDA to discuss how the tools could be further improved so that they could be used in future clinical trials to measure if a treatment for PHTS is working or not.