Time toxicity associated with treatment of metastatic or unresectable gastro-oesophageal cancers in the second-line setting.

[PURPOSE] Patients with metastatic or unresectable gastro-oesophageal cancers (mGECs) have poor prognoses and often face high symptom burdens and rates of disease-related complications. Second-line treatments offer modest survival gains, which need to be balanced with treatment toxicities. Time toxicity (TT) is increasingly recognised as a hidden toxicity of cancer therapy, and thus, this study aimed to quantify TT to patients undergoing second-line treatment for mGECs.

[METHODS] This was a retrospective cohort study across three major hospitals in Sydney, Australia. Records were reviewed for all patients who received second-line systemic therapy for mGECs over 10 years. TT was defined as the number of days patients spent physically interacting with the healthcare system.

[RESULTS] Eighty patients were identified, with the majority male (83%) and a median age of 64 years. The median time on second-line treatment was 2.4 months, and the median overall survival from the commencement of second-line treatment was 5.8 months. Patients spent a median 25% of days in physical contact with healthcare, of which 20% were planned encounters (e.g. clinic appointments, scheduled investigations, and treatment days). TT was lower in patients who remained on second-line treatment for more than 2 months versus those on treatment less than 2 months (29% vs. 23%, p < 0.001). One in eight patients died within 30 days of receiving second-line treatment.

[CONCLUSION] Patients on second-line treatment for mGEC spent 1 in 4 days in contact with healthcare, and 30-day mortality following systemic treatment was high. These findings may guide decisions and informed consent surrounding second-line treatment in mGECs.