Patient Population All NSCLC patients with advanced disease (Stage 3B or 4) starting systemic therapy at the Princess Margaret Hospital will be eligible to participate. Inclusion criteria include the physical ability to use the hand-held instrument (adequate vision, manual dexterity), provision of written informed consent, and written fluency in English, French, Italian, Spanish, Portuguese or Chinese. Patients will be excluded if they are unable to complete or understand the assessment process, or if they are receiving concurrent radical radiotherapy.