Pyrrole study - Information for participants

  • about 3 minutes
  • 11 December 2018

This stage of the study has now finished. Thank you to all who participated.

The information below has been left there for posterity.

Urinary kryptopyrrole testing has been used since the 1960s to assist in the management of mental health. Despite this long history of use, there has been minimal formal study into the validity of the testing. The Office of Research, in collaboration with SAFE Analytical Laboratories Pty Ltd (SAFE Labs), is undertaking research using SAFE Labs' urinary kryptopyrrole test in both a healthy adult population, and an adult population with diagnosed anxiety. It is hoped that a clear reference range for urinary kryptopyrroles can be established as a result of this study, enabling better patient management, and providing suitable data for registration of the test in Australia.

This page contains information and links for potential participants in the healthy and anxiety populations. For more general information about the study, please see

This study has ethical clearance (Endeavour HREC #20171111).

Who can participate in this study?

Adults with no diagnosed health conditions (and taking no medication), and adults diagnosed with anxiety (medication for anxiety allowed), are the two groups of people being recruited for this study.

What does it mean to be a participant?

Participation in the study requires attending the Endeavour College of Natural Health Fortitude Valley campus three times, each one week apart, where the participant will be asked to fill out a few questionnaires (described below) and be asked other questions relevant to the study, after which they will visit QML Fortitude Valley to provide a urine sample. At the end of the final visit, the participant will receive a $50 VISA gift card in appreciation of their involvement. Participants will also receive their test results upon request.

What questionnaires do participants fill out?

All participants will fill out a questionnaire known as the DASS-21 (described below), and be asked general health related questions by the research team for the purposes of the study. Participants with anxiety will fill out an additional questionnare known as the GAD-7 (described below).

What is the DASS-21?

The DASS-21 (Depression Anxiety Stress Scales 21 item) is a short questionnaire used to measure stress, anxiety and depression. The measurements obtained using the DASS-21 will be correlated with the urinary kryptopyrrole level to discover any significance.

What is the GAD-7?

The GAD-7 (Generalized Anxiety Disorder 7 item) is a short questionnaire used to measure anxiety. The measurements obtained using the GAD-7 will be compared with the DASS-21, and both analysed for correlation with the urinary kryptopyrrole level.

Are there any other questions that participants are asked?

Members of the research team will ask basic health related questions at each visit to provide important control data for the study, and to ensure participants are not experiencing any adverse events from participation in the study.

Are there any risks associated with participation?

As this is an observational study (meaning there is no intervention/treatment provided), there is low to negligible risk. Should any issues arise over the course of your participation, participants will be referred for appropriate care.

How do I sign up?

Recruitment in this stage of the study has now finished. Thank you to all who participated.