Individual Study / WHALE study

Well-being in Hospital Employees (WHALE) study

Well-being in Hospital Employees (WHALE) study

Initiatives -
The Well-being in Hospital Employees (WHALE) study is an ongoing prospective, observational cohort on work environment among all health care employees within the Capital Region of Denmark. The data are collected to continuously monitor the well-being of employees, in order to develop targets for potential intervention. *Note: All published information has been collected from the article referenced in the Marker Paper box below. Therefore, there may be variations with more advanced versions of the study.*
Start Year
This work was funded by the Danish Working Environment Research Fund (grant number 03‐2009‐09)


Investigators Contacts
  • Dr. Naja Hulvej Rod
    University of Copenhagen


Study design
Population cohort
Follow Up
The questionnaire responses from 2011 and 2014 have been linked to individual-level data on sickness absence from the payment system, which were collected on a monthly basis according to number of hours absent due to: general sickness absence, work injuries and absence in relation to sick children or chronic illnesses. In addition, the data linkage included information on standard working hours for each individual, seniority and length of employment. The data cover the period from January 2009 to June 2016.An additional wave is planned for 2017.

Marker Paper

Hvidtfeldt UA, Bjorner JB, Jensen JH, et al. Cohort Profile: The Well-being in HospitAL Employees (WHALE) study. Int J Epidemiol. 2017;46(6):1758-1759h. doi:10.1093/ije/dyx073

PUBMED 28637204


Sources of Recruitment
  • Individuals

Number of participants

Number of participants
Number of participants with biosamples
Supplementary Information
Employees at hospitals within the Danish Capital Region


Availability of data and biosamples