Comparison of Longer-term (5 Year+) Outcomes (Survival) of Smokers, Ex-smokers, Never Smoker and Quitters

Comparison of Longer Term Outcomes Following the LungCast "Smoking Cessation in Lung Cancer Study". Revisiting the Original LungCast Research Cohort to Look at Longer-term Outcomes (5+ Years) in Newly Diagnosed Lung Cancer, Within Hywel Dda University Health Board Participants Only, Who Were Smokers, Ex-smokers, Never Smoker and Quitters.

Between 2010-2020, the LungCAst observational study followed 3700 patients newly diagnosed with lung cancer across 33 hospitals in Wales and England for 2 years to see if smoking status at time of diagnosis predicted survival rate. This research was sponsored and led by Hywel Dda University Health Board (HDUHB).

This new study examines the health records, (of only the HDUHB participants included in the original LungCAst study), over a longer period of time to see if the benefits of stopping smoking at point of diagnosis with lung cancer continues over a longer period of time (5 years+).

A study into longer-term outcomes from the LUNGCAST study: comparing survival and healthcare utilisation according to smoking status in people with lung cancer, beyond 2 years. By obtaining Hospital Episode Statistics (HES) extract from the Welsh Patient Administration System (WPAS) and Welsh Clinical Portal (WCP) the investigators can retrospectively follow the cohort participants over time and analyse health care utilisation activity, using univariate and multivariate analysis on the effect of smoking status on survival. The Kaplan-Meier method, will be used to estimate the probability of survival over time.

Inclusion Criteria:

All patients from the Hywel Dda University Health Board's(HDUHB) site that participated in the original LungCast study

Exclusion Criteria:

• Individuals that did not participate in the original LungCast study in the HDUHB site.