The aims of this thesis were:
1) to improve the knowledge of physicians, researchers, and other health care professionals about the concepts, definitions, and application of some of the most frequently used patient reported outcomes (PROs) in lung cancer,
2) to stimulate the use of QoL measurement in lung cancer by testing the psychometric properties of the World Health Organization Quality of Life-BREF instrument (WHOQOL-BREF),
3) to identify clinical and sociodemographic variables that are related to HRQoL and QoL in lung cancer,
4) to investigate the association between patients’ feelings about treatment and HRQoL and QoL in lung cancer, and
5) to explore the process of treatment decision making in patients with lung cancer.