In New Zealand, lung cancer is the leading cause of death and a major source of health inequity for Māori. International studies of low-dose CT screening in high-risk asymptomatic people have demonstrated a 20-26% reduction in mortality and have stimulated lung cancer screening initiatives worldwide. A key issue in NZ is developing strategies that work for Māori. There is ongoing debate as to whether Māori are better served by screening programmes delivered through primary care or by centralised programmes. The primary aim of our study is to compare a primary care practice based invitation and risk assessment process compared with a DHB based centralised process. This project is part of a larger program of work that aims to reduce lung cancer mortality, improve chances of cure, and reduce health care costs in New Zealand.