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Benutzerspezifische Werkzeuge

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Current information on the expanded IPAUP research during the SARS-CoV-2/COVID-19 pandemic


  • Protection of (healthcare) workers
  • Epidemiology of COVID-19 deaths
  • Physical distancing in the home office
  • Ethics of natural experiments


Lewis P, Morfeld P, Mohren J, Hellmich M, Erren TC. Perinatal Photoperiod Associations with Diabetes and Chronotype Prevalence in a Cross-Sectional Study of the UK Biobank. Chronobiology International (2020); in production.

Morfeld P, Timmermann B, Groß JV, DeMatteis S, Campagna M, Lewis P, Cocco P, Erren TC. COVID-19: Spatial resolution of excess mortality in Germany and Italy.

Erren TC, Lewis P, Shaw DM. (2020) The COVID-19 pandemic: Ethical and scientific imperatives for “natural” experiments. Circulation. Online ahead of print. doi: 10.1161/CIRCULATIONAHA.120.048671.

Erren TC, Lewis P. (2020) SARS-CoV-2/COVID-19 and physical distancing: Risk for circadian rhythm dysregulation, advice to alleviate it, and natural experiment research opportunities. Chronobiology International. (in production).

Lewis P, Erren TC. (2020) COVID-19: science must not be the boy who cried wolf. J Epidemiol Community Health. Online ahead of print. doi: 10.1136/jech-2020-214448.

Erren TC, Morfeld P. (2020) COVID-19-Mortalität: Mit viel Sicht fliegen. Dtsch Ärztebl. 117(19): A-1010 / B-850.

Morfeld P, Erren TC. (2020) Todesfälle in neun Regionen Italiens im Februar/März 2020: „Mortalitäts-Exzess-Lupe“ für SARS-CoV-2/COVID-19-Epidemiologie in Deutschland. Deaths in nine regions of Italy in February/March 2020: „Mortality Excess Loupe“ for SARS-CoV-2/COVID-19-Epidemiology in Germany. Gesundheitswesen. doi: 10.1055/a-1160-5859.


A core area of our diverse research involves examining stress and strain due to night- and shift-work.

We focus on possible cancer risks (note that the International Agency for Research on Cancer [IARC] classified shift-work involving circadian disruption as probably carcinogenic to humans in 2007) and short-term effects such as sleepiness. Moreover, we develop methods to assess shift-work associated strain for individuals in epidemiological studies.

The „Cologne Laboratory of Shiftwork and Sleep (CLOSS)“ working group complements theoretical projects and literature syntheses with observational studies at workplaces that involve shift-work in Germany. Furthermore, we contribute to international research projects regarding effects of shift-work.

In a novel international project (Perinatal Light Imprinting of Circadian Clocks & Systems (PLICCS), we examine the influence of perinatal light/photoperiod on health and disease in children, adolescents and adults.

Our research interests also include hazardous substances at workplaces. As one example, we explored facets of the development of lung cancer in hardmetal production workers within an international cohort study.

Currently, we are preparing an update of the AWMF-Guideline „Working under the influence of infrared radiation“.

For an overview of our research activities please see Publications.