Task: Answer Verification
Input (English): Question: Is pretreatment quality of life an independent prognostic factor for overall survival in patients with advanced stage non-small cell lung cancer?
Answer: Pretreatment QOL measured by Uniscale is a significant and an independent prognostic factor for OS, and QOL should be routinely integrated as a stratification factor in advanced NSCLC trials.
Output (English): yes