Abstract

e23177 Background: Immune checkpoint inhibitors (ICIs) bear unique, time-dependent immune-related adverse events (irAEs). However, limited data exist regarding tolerability in real-world populations. We report interim, non-sex stratified results of the first study prospectively evaluating ICI tolerability in patients with lung cancer (LC) in a real-world setting. Methods: Recruitment began in July 2023 and is ongoing. The electronic Patient-Reported Outcomes version of the Common Terminology Criteria (PRO-CTCAE) was utilized to assess patients’ irAEs. Patients (pts) complete up to 6 questionnaires throughout their treatment plus an end of treatment evaluation. Inclusion criteria includes pts ≥18 years, with LC stage I to IV, receiving single-agent ICI at Dana-Farber Cancer Institute. Descriptive statistics summarized patients' demographics, clinical characteristics, and symptoms. Results: 36 pts were enrolled in the study as of January 23, 2024. 35 pts have completed their first PRO-CTCAE questionnaire; the median number of completed questionnaires was 2 (range: 1-6). Due to the current sample size, results reported reference pts’ first PRO-CTCAE assessment. 53% of pts identified as female, 92% identified as White, and 6% as Black (Table 1). 56% of pts (19/34) reported having shortness of breath (SOB), most of whom (63%; 12/19) reported having moderate to severe SOB that often (somewhat to very much; 42%; 8/19) interfered with daily activities; 21% of them (4/19) stated that the SOB had worsened since starting ICIs. Similarly, of the 54% (19/35) with a cough, 42% (8/19) reported a moderate to very severe cough and 16% (3/19) reported its worsening since ICI initiation. 14 pts reported anorexia secondary to treatment, with most of them (57%; 8/14) reporting that it interfered with daily activities. Most pts (79%; 27/34) noted some degree of lack of energy. Rates of skin toxicity were low, with only 6% (2/35) experiencing a rash after beginning ICIs. Many pts did not experience nausea, abdominal pain, or unexpected sweating (80%; 28/35, 83%; 29/35, 77%; 27/35). However, of the pts reporting nausea and abdominal pain, high severity of these symptoms was noted (43%; 3/7, 50%; 3/6). Other low frequency irAEs included diarrhea, dry mouth, and dysgeusia. Conclusions: SOB and cough were the most common symptoms experienced with high severity in this ongoing prospective evaluation of irAEs in pts with LC. Though nausea and abdominal pain were less common, when present, these symptoms were reported with high severity. Future data from this study will elucidate patient experiences with irAEs throughout their treatment course. [Table: see text]