Characterizing pain in long-term survivors of childhood cancer.

Many long-term survivors of childhood cancer (LTSCC), individuals at least 5 years post-diagnosis or 2 years post-treatment, experience late- and long-term effects from their treatments, including pain. Yet, pain is poorly understood among LTSCC. The current study aimed to (1a) describe rates and multiple dimensions of pain; (1b) identify patterns of chronic pain; and (2) test correlates of chronic pain in LTSCC. Survivors (n = 140; 48.6% male, Mage = 17.3 years (range = 8-25)) were recruited from across Canada. Between 2017 and 2019, participants completed the Pain Questionnaire, Pain Catastrophizing Scale, Pediatric Quality of Life Inventory, Patient-Reported Outcome Measurement Information System (PROMIS)-Pain Interference, Anxiety, and Depression scales, Child Posttraumatic Stress Scale, the Posttraumatic Stress Disorder Checklist for the DSM-V, and the Cancer Worry Scale.
RESULTS: Twenty-six percent of LTSCC reported experiencing chronic pain. Exploratory cluster analysis showed 20% of survivors had moderate to severe chronic pain based on measures of pain intensity and interference. The combination of higher posttraumatic stress symptoms, older current age, more pain catastrophizing, and sex (being female) significantly predicted the presence of chronic pain in logistic regression, χ2 (4, N = 107) = 28.10, p < .001. Higher pain catastrophizing (OR = 1.09; 95% CI = 1.02-1.16), older current age (OR = 1.20; 95% CI = 1.07-1.34), and higher posttraumatic stress (OR = 1.92; 95% CI = 1.01-3.63) were significant predictors of chronic pain. LTSCC should be screened for the presence and magnitude of chronic pain during long-term follow-up visits so appropriate interventions can be offered and implemented. Future research should investigate pain interventions tailored for this population. RELEVANCE: Findings support regular screening for the presence and magnitude of chronic pain in survivors of childhood cancer in long-term follow-up care.