Fatigue can be a prevalent and serious problem for the individual with cancer and can negatively impact on the individual's quality of life. Little is known about the prevalence of clinical fatigue among patients with cancer and how the fatigue cancer patient's experience compares with the fatigue people experience as a function of their normal daily activities. This study, which utilized a control group, investigated the prevalence of fatigue among patients receiving treatment with radiotherapy (n = 54) and chemotherapy (n = 47) over two measurement points. The level of fatigue experienced by cancer patients was compared with the level of fatigue experienced by apparently healthy auxiliary staff (n = 53) working at three cancer treatment facilities. There were no differences in the mean level of fatigue experienced by cancer patients and the mean level experienced by healthy controls before the start of cancer treatment.