This study is for people with early-stage lung cancer. It compares two treatments: **Stereotactic Ablative Radiotherapy (SAbR)** and **Sublobar Resection (SR)**. SAbR is a type of radiation therapy that targets the cancer precisely, while SR is a surgery to remove part of the lung. Researchers want to find out if SAbR helps people live longer than SR.
Key points to consider:
- The study will last at least 2 years, and you will be followed up after treatment.
- You will be randomly assigned to either SAbR or SR, but you can choose to participate or not.
- Only people who agree to the study terms can join, and they must meet specific health criteria.
To join the study, you must be over 18, have a specific type of lung cancer, and meet certain health conditions. You can't join if you're pregnant, have had previous lung surgery or certain cancers recently. If you decide to join, you will receive care and observation after your treatment, whether it's SAbR or SR.