Late complications among adult survivors of neuroblastoma in the St. Jude Lifetime Cohort Study (SJLIFE).
10561 Background: Assessment of late outcomes in neuroblastoma survivors has generally consisted of self-reported health events within retrospective cohorts. We aimed to characterize the health outcomes of a clinically-assessed cohort of long-term survivors of neuroblastoma diagnosed between 1963-2003. Methods: In a cohort of 239 ten-year survivors of neuroblastoma, of whom 137 (57%) underwent comprehensive clinical assessments, chronic conditions were graded using a modified version of the Common Terminology Criteria of Adverse Events, version 4.03. Comparisons were made using 272 clinically assessed community controls. Log-binomial regression was used to compare the prevalence of chronic conditions (grade 1-5) between survivors and controls and to calculate prevalence ratio (PR) and 95% confidence intervals (CI). Mean cumulative count (treating death as a competing risk) of chronic conditions by age was used to estimate cumulative burden with imputation of outcomes for non-clinically assessed survivors. Results: The median age at diagnosis was 0.9 (range: 0.0-14.4) and the median age at follow-up was 31.9 (range: 20.2-54.6) years for clinically assessed survivors. Median age of controls was 34.7 (range: 18.3-70.2). Treatment consisted of chemotherapy (75%), radiation (23%) and surgery (91%). Survivors were more likely than controls to have hearing loss (31.4% vs. 2.9%, PR = 10.7, 95% CI = 5.2-22.0), cardiomyopathy (8.8% vs. 0.7%, PR = 11.9, 95% CI = 2.7-52.5), hypothyroidism (10.9% vs. 5.2%, PR = 2.1, 95% CI = 1.1-4.3) or neurological disorders (56.9% vs. 32.4%, PR = 1.8, 95% CI = 1.4-2.2). At 35 years of age, the cumulative incidence of survivors experiencing at least one grade 3-5 condition was 67.3% (95% CI = 58.3-76.0%). By age 35 survivors experienced, on average, 8.5 (95% CI = 7.6-9.3) grade 1-5 and 2.4 (95% CI = 2.0-2.8) grade 3-5 conditions per 100 survivors, which was higher than the burden of grade 1-5 (3.3 [95%CI = 2.9-3.7]) and grade 3-5 (0.9 [95%CI = 0.7-1.0]) conditions identified among controls. Conclusions: Two-thirds of survivors are affected by severe or life-threatening health conditions. Continued follow-up, screening and intervention provide opportunities to optimize health.