Survival discrepancy between patients treated in a clinical trial and routine practice is well recognized. No study has assessed the health-related quality of life (HRQL) of long-term Hodgkin's lymphoma survivors (HLS) according to trial participation. We applied a population-based approach to examine the differences in HRQL, healthcare utilization, and satisfaction with healthcare among long-term HLS who had participated in a trial (tHLS) and those treated in routine care (rHLS). All HLS diagnosed during the period 1989-1998 and living in southern Netherlands were selected from the Netherlands Cancer Registry in 2004 to participate in the Patient Reported Outcomes Following Initial treatment and Long-term Evaluation of Survivorship registry study. Data linkage with the European Organisation for Research and Treatment of Cancer was performed in 2015 to identify trial participation. The 65 tHLS and 67 rHLS had comparable demographic and clinical characteristics. Unadjusted and adjusted models indicated no association between trial participation and HRQL. There was no evidence of differences in healthcare satisfaction. Trial participation was associated with 48% more visits to specialists in the past year (adjusted 95% confidence interval: 10-99). No association of trial participation with cancer-related contacts was observed. tHLS and rHLS had comparable long-term HRQL. Although trial participation was associated with more specialist visits, there was no evidence of an association with healthcare satisfaction and the number of cancer-related visits. Identification of trial participation in population-based cancer registry through data linkage with clinical trials enables a population-based approach to examine patient-reported outcomes differences between tHLS and rHLS.
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