Title

The Complementary Nature of Patient-Reported Outcomes and Adverse Event Reporting in Cooperative Group Oncology Clinical Trials: A Pooled Analysis (NCCTG N0591).

Document Type

Article

Publication Date

10-1-2015

Publication Title

Journal of pain and symptom management

Abstract

CONTEXT: Clinical trials use clinician-graded adverse events (AEs) and patient-reported outcomes (PROs) to describe symptoms.

OBJECTIVES: The aim of the study was to examine the agreement between PROs and AEs in the clinical trial setting.

METHODS: Patient-level data were pooled from seven North Central Cancer Treatment Group, two Southwest Oncology Group, and three Radiation Therapy Oncology Group lung studies that included both PROs and AE data. Ten-point changes (on a 0-100 scale) in PRO scores were considered clinically significant differences (CSDs). PRO score changes were compared to AE grade (Gr) categories (2+ yes vs. no and 3+ yes vs. no) using Wilcoxon rank-sum or two-sample t-tests between Gr categories. Incidence rates and concordance of CSD in PRO scores and AE Gr categories were compiled. Spearman correlations were computed between PRO scores and AE severity.

RESULTS: PROs completed by patients (n = 1013) were the Uniscale, Lung Cancer Symptom Scale (LCSS), Functional Assessment of Cancer Therapy-Lung (FACT-L), Symptom Distress Scale, and/or Functional Living Index-Cancer. Significantly worse PRO score changes were found for the FACT-L in patients with Gr 2+ AEs. Worse scores were seen for the Uniscale for patients with Gr 2+ AEs (P = 0.07) and LCSS for patients with Gr 3+ AEs (P = 0.09). Agreement between incidence of any Gr 2+ (Gr 3+) AE and a CSD in PROs ranged from 27% to 67% (36%-61%). Correlations between PRO scores and AE severity were low: -0.06 Uniscale, -0.03 LCSS, 0.10 FACT-L, -0.11 Symptom Distress Scale, and -0.51 Functional Living Index-Cancer.

CONCLUSION: These results support previous work and an a priori hypothesis that AEs and PROs measure differing aspects of the disease experience and are complementary.

Medical Subject Headings

Aged; Clinical Trials as Topic; Female; Follow-Up Studies; Humans; Incidence; Male; Middle Aged; Neoplasms; Patient Outcome Assessment; Physicians; Self Report; Severity of Illness Index; Treatment Outcome

PubMed ID

26031708

Volume

50

Issue

4

First Page

470

Last Page

479

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