Impact of symptom burden on health related quality of life of cancer survivors in a Danish cancer rehabilitation program: A longitudinal study

Abstract

Introduction . Little research has been conducted on the effect of self-reported rating of symptom severity on quality of life (QoL) among cancer survivors. The aim of the study was to examine the prevalence of symptoms and whether information about self-reported symptom severity adds value to QoL measurements. Material and methods . A questionnaire including the EORTC QLQ-C30 and an empirically derived symptom check-list was completed by 2 486 cancer survivors participating in a rehabilitation program at baseline and at 1, 6 and 12 months ' follow-up. We used multivariate linear regression models to evaluate the association between QoL and the dichotomous variables for perceived symptom severity (high vs. low) and cancer stage (high vs. low), with adjustment for age, gender, education and time since diagnosis. Results . Of the 2 379 participants who reported having one or more symptoms, 1 479 (62%) considered the reported symptom to be severe. This subgroup had signifi cantly poorer QoL at baseline for all sites, ranging from Ϫ15.9 to Ϫ10.2, compared to those who did not regard their symptom as severe. Signifi cantly lower baseline levels on all functional subscales were seen for all sites in association with high perceived symptom severity (range from Ϫ9.9 to Ϫ3.0 (physical functioning), from Ϫ21.1 to Ϫ13.0 (social functioning), from Ϫ18.8 to Ϫ8.5 (emotional functioning), and from Ϫ18.4 to Ϫ9.6 (cognitive functioning). The impairment of physical, social, emotional, and cognitive functioning persisted through 12 months for participants with cancer of the breast, lung and those with lymphomas, although not all reached signifi cance. Discussion . Cancer survivors, irrespective of cancer site, experience a high burden of symptoms. Thorough monitoring and assessment of symptoms and careful scrutiny of cancer survivors ' perceptions of how symptoms affect their lives is critical for clinical identifi cation of patients who might benefi t from enhanced medical attention and may be an important supplement to QoL measures.

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