Evolution of Cancer-Related Symptoms Over an 18-Month Period

ContextPrevious studies have revealed inconsistent findings about the longitudinal evolution of cancer-related symptoms. In addition, the contribution of medical factors (e.g., cancer site, and treatments) in explaining the changes in these symptoms is yet to be established.ObjectivesThis prospective study investigated longitudinal changes of five symptoms (i.e., depression, anxiety, insomnia, fatigue, and pain) in patients scheduled to undergo surgery for cancer (N = 828).MethodsThe patients completed the Hospital Anxiety and Depression Scale, the Insomnia Severity Index, the Multidimensional Fatigue Inventory, and a pain questionnaire at baseline and after 2, 6, 10, 14 and 18 months.ResultsSeveral time changes were statistically significant but effect sizes only revealed one change of a medium magnitude, that is, a reduction of anxiety from T1 to T2 (d = ?0.58). Women with breast or gynecological cancer were the only subgroups to exhibit significant changes (i.e., reduction of a small magnitude of anxiety symptoms from T1 to T2; ds = ?0.27 and ?0.30, respectively). However, numerous differences were found across adjuvant treatments, including greater variations in depression and insomnia scores in the chemotherapy group (ds = ?0.71 to 0.20) and a transient increase in fatigue symptoms in patients receiving “all” adjuvant treatments (ds = ?0.24 to 0.37).ConclusionThe severity of cancer-related symptoms varies during the cancer care trajectory, especially anxiety scores, which importantly decrease during the first few months after the surgery. This study also suggests that treatment regimens better account for individual differences than cancer site in the evolution of symptoms.