Table 2

Measurement of exposure variables and health outcomes in the Maastricht Cohort Study of “Fatigue at Work”

TimeQuestionnaireExposure measurementOutcome measurement
May 1998 (baseline)Extensive
September 1998Short
January 1999Short
May 1999Extensive
September 1999Short
January 2000Short
May 2000Extensive
September 2000Short
January 2001Short