30 Years of Data Said Women Were Right. So Why Are We Still Waiting 8 Years for a Diagnosis?
The Australian Longitudinal Study on Women's Health just reached its 30-year milestone. It tracked 57,000 women, changed national policy, and confirmed what patients already knew. So why is the diagnosis delay for endometriosis still 6–8 years?
What is the ALSWH — and why does it matter?
Founded on April 22, 1996, as a collaboration between the University of Newcastle and the University of Queensland, the Australian Longitudinal Study on Women's Health (ALSWH) is the largest study of its kind in Australia. ‘
It now tracks more than 57,000 women across regional, remote, and metropolitan Australia, across four generations born between 1921 and 1995.
In 2026, its oldest active participants are turning 105. The study includes 135 people over the age of 100 still completing surveys. At the other end of the cohort, women born in the early 1990s are now in their early 30s and still, in many cases, navigating the same diagnostic barriers their mothers and grandmothers faced.
The ALSWH was founded, in the words of its director Professor Deb Loxton, at a time when "women's health research was viewed as little more than the sum of our reproductive parts." The study was explicitly designed to correct that to gather data on women's physical and mental health, service use, behaviours, risk factors, and the social contexts of their lives.
Thirty years later, it has produced more than 1,200 peer-reviewed publications, directly informed two major national policy frameworks, and generated findings that have changed how we understand endometriosis, PCOS, domestic violence, and ageing in women.
And yet.
The endometriosis finding that should have changed everything
In 2023, ALSWH data revealed that 1 in 7 Australian women aged 40–44 have been diagnosed with endometriosis: a higher rate than any previous estimate. Those findings were incorporated into the Australian Institute of Health and Welfare's national report on endometriosis prevalence and hospitalisation rates.
The finding was significant. But what makes it remarkable and troubling is the context in which it sits.
The ALSWH had been asking participants about endometriosis since the year 2000. That is 23 years of longitudinal data on a condition that affects roughly 1 in 7 women, produces profound, often debilitating symptoms, and still carries an average diagnostic delay of 6–8 years.
Professor Gita Mishra AO, the University of Queensland's director of the ALSWH, put it plainly: "Endometriosis has become a hot topic in recent years, but we were already asking study participants about the condition back in 2000. If we hadn't asked these questions all those years ago, we wouldn't have the incredible resource of data we have today."
That data has now been used to develop a simple 5-minute questionnaire to help GPs identify endometriosis earlier and potentially reducing that 6–8 year wait significantly.
A five-minute questionnaire. Derived from 23 years of data. To fix a problem that the data had been documenting for 23 years.
Why the delay persists and what the research tells us
The diagnostic delay in endometriosis is not primarily a knowledge problem. The ALSWH data has confirmed the condition's prevalence. International studies, including a 2024 systematic scoping review spanning 23 countries (Fryer et al., Health Care for Women International), have documented the delay mechanisms at every level of the healthcare system: patient, provider, and structural.
Women are socialised to minimise pain. Decades of normalising period pain means many women do not seek help until symptoms are severe by which point damage may already have occurred.
GPs lack specific training. Endometriosis receives minimal dedicated time in medical training curricula in most countries, including Australia.
Symptoms overlap with dismissed conditions. Endometriosis symptoms overlap with IBS, anxiety, and "functional" conditions, categories historically associated with psychosomatic dismissal.
Standard tests miss it. Endometriosis cannot be diagnosed through standard blood tests or ultrasound alone. Definitive diagnosis requires laparoscopy meaning it doesn't show up in the "your results look normal" category that ends so many appointments.
The domestic violence finding: a different kind of health gap
The ALSWH's impact extends well beyond reproductive health. Professor Loxton's work using study data was the first to show that the mental and physical health effects of domestic violence can last for decades.
A finding that directly informed the National Plan to End Violence Against Women and Children 2022–2032.
In 2025, new ALSWH data went further: women who experienced domestic violence were more likely to develop two or more chronic health conditions, with onset more than eight years earlier than women who had not experienced violence.
This is a finding with profound implications for how healthcare systems should respond to women presenting with complex, multi-system chronic illness. Violence is an upstream health determinant. Not treating it as one, not asking about it, not acting on it is a clinical failure with decade-long consequences.
What 30 years of data means for you — right now
The ALSWH represents an extraordinary scientific achievement. It has changed national policy, generated foundational evidence, and created a data resource that will benefit women's health research for decades to come.
But for the women who lived through the past 30 years with undiagnosed endometriosis, undertreated pain, or dismissed symptoms, the milestone also marks something more painful: evidence of how long it takes for research findings to reach clinical practice.
You should not have to wait for the next major study to access better healthcare. The tools exist. The data exists. What is still catching up is the delivery of that research into the hands of women who need it now.
That is what TrialMe is building.
Sources
ALSWH 30-year milestone. University of Newcastle & UQ, April 2026. newcastle.edu.au · uq.edu.au · alswh.org.au
Australian Institute of Health and Welfare. Endometriosis in Australia 2023. aihw.gov.au/reports/chronic-disease/endometriosis-in-australia-2023
Gete DG et al. Associations between endometriosis and common symptoms: findings from ALSWH. Am J Obstet Gynecol. 2023;229:536.e1-20. doi: 10.1016/j.ajog.2023.07.033
Fryer J et al. Understanding diagnostic delay for endometriosis. Health Care for Women International. 2024;46(3):335-351.
Loxton D et al. Domestic violence and long-term chronic health outcomes. ALSWH 2025 data. alswh.org.au