In all of the study waves, data were collected from the following three areas: demographic, personal and family medical history, and clinical examinations. The control study 1 (the “PEG” study) was an open randomized multicenter
phase III trial of 436 patients with stage IIIB/IV non-small cell lung cancer by the Norwegian Lung Cancer Group.18 The
aim of the study was to compare pemetrexed plus carboplatin versus gemcitabine plus carboplatin as first line chemotherapy, with respect to health-related quality of life, survival, and toxicity. All patients received four cycles of chemotherapy. The study was conducted from April 2005 to July 2006.