Has the National Fall in Smoking Rates in Ireland Been Replicated in Cancer Patients? A 5-Year Report

Smoking among cancer patients leads to poorer outcomes, yet many patients continue smoking. As part of a feasibility study of smoking cessation for cancer patients in Ireland, smoking rates were reviewed. Hospital Inpatient Enquiry (HIPE) data on the smoking status of discharges with a cancer diagnosis (overall, breast, lung, cervical and head and neck cancer) were used (2014-2018). During 2014-2017, current smoking increased for overall (10.5-11.7%) and lung cancer (24.7-27.2%), then decreased to 11.4% and 24.1%, respectively, in 2018. Current smoking increased for cervical during 2014-2018 (11-19.8%) and initially (2014-2016) for head and neck (3-12.7%) cancer, decreasing to 7.6% in 2018; breast cancer was stable at 6 +/- 0.6%. These rates are lower than the Irish (23-20%) and European (29% (average)) general population. During 2014-2017, past smoking increased among overall (15.2-21%) and specific cancers, which was lower than the Irish general population (23-28%). Current smoking was highest among 50-59-year-olds (14-16%), which contrasts with the Irish general population (24-35 years at 32-28%). HIPE data are subject to potential duplicate episodes of care and under-documentation of smoking. However, trend analysis is useful, as these limitations should be stable. Rates remain high; therefore, robust documentation and smoking cessation referrals for cancer patients are important.