The Tasmanian Longitudinal Health Study

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Welcome, Researchers

The Tasmanian Longitudinal Health Study welcomes the interest and research proposals to use our data sets from outside researchers. Proposals can involve using pre-existing de-identified data sets from the TAHS or using the TAHS biospecimens. However, the TAHS has strict practices and policies regarding the use and sharing of biospecimens across academic institutions. If biospecimens are required, the applicant must first consult with Prof. Shyamali Dharmage, the TAHS Principal Investigator, to determine the feasibility of using TAHS biospecimens in potential collaborative research.

Use of TAHS data terms and conditions

Before requesting access to the TAHS de-identified data sets, please review the TAHS policies form and make sure that your institution can agree with the terms and conditions as written. All researchers requesting TAHS data sets must complete a Study Proposal form and have the approval of the TAHS steering committee. The Study Proposal is used to determine whether your research proposal is feasible and whether we have the data sets needed to answer your research objectives.

Forms to be completed by the applicant

  • TAHS Policies form
  • Study Proposal form
  • Example of an approved study proposal

Please email all the completed forms to the TAHS data manager, Dr Gayan Bowatte ( The application will be forwarded to the steering committee to review.

The steps in the application process to use TAHS data

What has been measured in the TAHS?

The TAHS resource contains key respiratory outcomes, collected at multiple time points that comprise of parent-completed and self-completed questionnaires of probands, siblings and parents. The probands also completed a questionnaire for their offspring at 2 time points.

In addition to respiratory outcomes. the TAHS also collected environmental data, other clinical measurements, and biological samples across the follow up studies.

Click here to see what data are available

Please contact the TAHS Principal Investigator, Prof. Shyamali Dharmage ( to discuss your research idea.

Develop a proposal on the standard proforma and send it to the Principal Investigator for circulation to TAHS Standing Committee and investigators

Tips for a successful Study Proposal application:

  • A clear research rationale.
  • Present a Directed Acyclic Graph (DAG) to demonstrate which TAHS data will be required for the project.
  • Clear statistical approaches to analyse data.

Download a study proposal template here

Download example of an approved research proposal here

Once the steering committee has approved the research plan, please submit the approval form to and use the Data Request form(s)
to request the specific data sets/ variables outlined in the research proposal.

You may access all of the TAHS questionnaires (including laboratory booklets) and data dictionaries from the 1968 study to the most recent completed study in 2016 by clicking here.

Please review the TAHS policies form and make sure that you and your institution can agree with the terms and conditions as written

The person designated to receive the TAHS data will receive a Cloudstor link to securely download data file(s) from the TAHS data manager, Dr. Gayan Bowatte ( Datasets will be delivered in STATA format (or Excel format to use with other statistical packages if required)

Project completion & Data sharing

After the projects have been completed, the researchers are expected to return any secondary variables created (additional variables that were created using the TAHS data sets/ variables) to the data manager within 1 month of their publication. In this way, the contribution of such new secondary variables helps to advance the progress and utilization of TAHS data to its maximum potential. The growth of the TAHS dataset will ensure that a more robust dataset will be available for future research.

Please contact Dr. Gayan Bowatte ( for information on returning secondary variables.