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Low back pain subgroups using fear-avoidance model measures: results of a cluster analysis.

Publication ,  Journal Article
Beneciuk, JM; Robinson, ME; George, SZ
Published in: Clin J Pain
October 2012

OBJECTIVES: The purpose of this secondary analysis was to test the hypothesis that an empirically derived psychological subgrouping scheme based on multiple Fear-Avoidance Model (FAM) constructs would provide additional capabilities for clinical outcomes in comparison with a single FAM construct. METHODS: Patients (n=108) with acute or subacute low back pain enrolled in a clinical trial comparing behavioral physical therapy interventions to classification-based physical therapy completed baseline questionnaires for Pain Catastrophizing Scale, fear-avoidance beliefs [Fear-Avoidance Beliefs Questionnaire (FABQ)-physical activity scale (PA), FABQ work scale], and patient-specific fear (Fear of Daily Activities Questionnaire). Clinical outcomes included pain intensity and disability measured at baseline, 4 weeks, and 6 months. A hierarchical agglomerative cluster analysis was used to create distinct cluster profiles among the FAM measures and discriminant analysis was used to interpret clusters. Changes in clinical outcomes were investigated with repeated measures analysis of variance and differences in results based on cluster membership were compared with FABQ-PA subgrouping used in the original trial. RESULTS: Three distinct FAM subgroups (Low-Risk, High Specific Fear, and High Fear and Catastrophizing) emerged from cluster analysis. Subgroups differed on baseline pain and disability (P<0.01) with the High Fear and Catastrophizing subgroup associated with greater pain than the Low-Risk subgroup (P<0.01) and the greatest disability (P<0.05). Subgroup×time interactions were detected for both pain and disability (P<0.05) with the High Fear and Catastrophizing subgroup reporting greater changes in pain and disability than other subgroups (P<0.05). In contrast, FABQ-PA subgroups used in the original trial were not associated with interactions for clinical outcomes. DISCUSSION: These data suggest that subgrouping based on multiple FAM measures may provide additional information on clinical outcomes in comparison with determining subgroup status by FABQ-PA alone. Subgrouping methods for patients with low back pain should include multiple psychological factors to further explore if patients can be matched with appropriate interventions.

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Published In

Clin J Pain

DOI

EISSN

1536-5409

Publication Date

October 2012

Volume

28

Issue

8

Start / End Page

658 / 666

Location

United States

Related Subject Headings

  • Young Adult
  • Time Factors
  • Surveys and Questionnaires
  • Self Report
  • Pain Measurement
  • Outcome Assessment, Health Care
  • Middle Aged
  • Male
  • Low Back Pain
  • Humans
 

Citation

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Beneciuk, J. M., Robinson, M. E., & George, S. Z. (2012). Low back pain subgroups using fear-avoidance model measures: results of a cluster analysis. Clin J Pain, 28(8), 658–666. https://doi.org/10.1097/AJP.0b013e31824306ed
Beneciuk, Jason M., Michael E. Robinson, and Steven Z. George. “Low back pain subgroups using fear-avoidance model measures: results of a cluster analysis.Clin J Pain 28, no. 8 (October 2012): 658–66. https://doi.org/10.1097/AJP.0b013e31824306ed.
Beneciuk JM, Robinson ME, George SZ. Low back pain subgroups using fear-avoidance model measures: results of a cluster analysis. Clin J Pain. 2012 Oct;28(8):658–66.
Beneciuk, Jason M., et al. “Low back pain subgroups using fear-avoidance model measures: results of a cluster analysis.Clin J Pain, vol. 28, no. 8, Oct. 2012, pp. 658–66. Pubmed, doi:10.1097/AJP.0b013e31824306ed.
Beneciuk JM, Robinson ME, George SZ. Low back pain subgroups using fear-avoidance model measures: results of a cluster analysis. Clin J Pain. 2012 Oct;28(8):658–666.

Published In

Clin J Pain

DOI

EISSN

1536-5409

Publication Date

October 2012

Volume

28

Issue

8

Start / End Page

658 / 666

Location

United States

Related Subject Headings

  • Young Adult
  • Time Factors
  • Surveys and Questionnaires
  • Self Report
  • Pain Measurement
  • Outcome Assessment, Health Care
  • Middle Aged
  • Male
  • Low Back Pain
  • Humans