Thörn, Ake · International journal of occupational and environmental health · 2002 · DOI
This paper discusses challenges in studying conditions like ME/CFS that have many different symptoms but no clear physical test to diagnose them. The authors suggest that studying how these illnesses develop over time, through detailed interviews and case studies, may help us understand them better than traditional research methods that count statistics across large groups.
This study directly addresses a fundamental problem in ME/CFS research: how to study diseases that have many variable symptoms but no single diagnostic test. By advocating for qualitative research methods alongside traditional epidemiology, the authors offer a methodologic framework that could improve how ME/CFS is investigated and better capture the complex, evolving nature of the illness.
This is a methodologic commentary rather than an empirical study, so it does not provide new data about ME/CFS etiology, prevalence, or pathophysiology. It does not prove that any particular cause or mechanism is responsible for ME/CFS symptoms. It does not establish that qualitative methods alone are sufficient; rather, it suggests they complement traditional epidemiology.
About the PEM badge: “PEM required” means post-exertional malaise was an explicit required diagnostic criterion for participant inclusion in this study — not that PEM was studied, observed, or discussed. Studies using criteria that do not require PEM (e.g. Fukuda, Oxford) are tagged “PEM not required”. How the atlas works →
The first block is for the primary paper and is the citation you should use in research work. The atlas-snapshot line only applies if you are specifically referring to this atlas’s reading of the paper on the date shown.
Primary citation
Thörn, Ake (2002). Methodologic aspects of the study of modern-age diseases: the example of sick-building syndrome.. International journal of occupational and environmental health. https://doi.org/10.1179/107735202800338614
BibTeX
@article{mecfsatlas-thrn-2002-methodologic-aspects,
author = {Thörn, Ake},
title = {Methodologic aspects of the study of modern-age diseases: the example of sick-building syndrome.},
journal = {International journal of occupational and environmental health},
year = {2002},
doi = {10.1179/107735202800338614},
note = {PubMed: 12412855},
url = {https://www.mecfsatlas.com/evidence/thrn-2002-methodologic-aspects},
}Atlas snapshot reference
ME/CFS Atlas. Generator v1 / Scanner v1.4 / policy v0.1. Accessed 2026-05-30. https://www.mecfsatlas.com/evidence/thrn-2002-methodologic-aspects
Contribute
Private, reviewed by a human. Not a public comment thread.