Physical Functioning: Self-Report and Performance Measures Are Related but Distinct

作者：Harriet M. Wittink, William H. Rogers, Andrew Sukiennik, Daniel B. Carr · 发表于：Spine · 年份：2003 · DOI：10.1097/01.brs.0000085304.01483.17 · 被引用次数：145 · 研究领域：Musculoskeletal pain and rehabilitation、Fibromyalgia and Chronic Fatigue Syndrome Research、Diabetes Management and Education

STUDY DESIGN: Cross-sectional study of 63 patients with chronic low back pain (CLBP). OBJECTIVES: To determine the relationship between the SF-36 physical functioning (PF) scale and physical performance on a modified symptom limited treadmill test, and to determine the effect of disability status and SF-36 mental health (MH) scores on self-reported physical functioning and on physical performance. SUMMARY OF BACKGROUND DATA: Patients with CLBP report low levels of physical functioning. Because self-report measures are influenced by psychosocial factors, such as disability and low MH, a common recommendation is to supplement self-report with objective or physical performance testing. Little information exists regarding whether performance testing is also influenced by disability and low MH. MATERIALS AND METHODS: Patients completed the SF-36 and performed a maximal, symptom-limited, modified treadmill test. Total walking time and heart rate on the treadmill were registered. The effects of disability and low MH on self-report and performance testing were calculated by unpaired Student's t-testing and effect size estimation. RESULTS: A strong relationship between the PF scale of the SF-36 and treadmill walking time was found, but there was little evidence of overlap between these physical functioning domains. Both disability status and low MH had a much larger effect on self-report measures than on physical performance. CONCLUSIONS: Self-report measurements and performance-based...