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Improvement in Work Ability, Psychological Distress and Pain Sites in Relation to Low Back Pain Prognosis: A Longitudinal Observational Study in Primary Care.
Spine 2018 September 18
STUDY DESIGN: Prospective observational study pooled from two clinical cohorts.
OBJECTIVE: To investigate the longitudinal relation between multisite pain, psychological distress and work ability with disability, pain and quality of life.
SUMMARY OF BACKGROUND DATA: Knowledge of prognostic factors is essential for better management of patients with low back pain (LBP). All domains of the biopsychosocial model has shown prognostic value; however, clinical studies rarely incorporates all domains when studying treatment outcome for LBP patients.
METHODS: 165 Patients with non-specific LBP seeking primary care physiotherapy were included. Mixed-effects models were used to estimate longitudinal relations between the exposure variables and concurrent measures of outcomes at baseline and 3 months. Logistic regression was used to estimate odds ratios for minimal important difference in outcome.
RESULTS: Higher work ability was associated with less disability -2.6 (95% CI: -3.3, -2.0), less pain: -0.4 (95% CI: -0.5, -0.3), and higher quality of life 0.03 (95% CI: 0.02, 0.04). Increased psychological distress and number of pain sites were associated with higher disability: 10.9 (95% CI: 7.7, 14.1) and 1.9 (95% CI: 0.9, 2.8), higher pain: 1.9 (95% CI: 1.3, 2.5) and 0.4 (95% CI: 0.2, 0.5), and lower quality of life: -0.1 (95% CI: -0.2, -0.1) and -0.02 (95% CI: -0.03, -0.01), respectively. Improvement in work ability showed consistent associations with successful outcome for disability (OR: 4.8, 95% CI: 1.3, 18.1), pain (OR: 3.6, 95% CI: 1.1, 12.1) and quality of life (OR: 4.5, 95% CI: 1.4, 15.1) at 3 months. Reduced psychological distress was associated with improvement in pain only (OR 4.0, 95% CI: 1.3, 12.3).
CONCLUSION: More pain sites, higher psychological distress or lower work ability showed higher disability, more pain, and lower quality of life in patients with low back pain. Only improvement in work ability was consistently related to successful outcomes.
LEVEL OF EVIDENCE: 2.
OBJECTIVE: To investigate the longitudinal relation between multisite pain, psychological distress and work ability with disability, pain and quality of life.
SUMMARY OF BACKGROUND DATA: Knowledge of prognostic factors is essential for better management of patients with low back pain (LBP). All domains of the biopsychosocial model has shown prognostic value; however, clinical studies rarely incorporates all domains when studying treatment outcome for LBP patients.
METHODS: 165 Patients with non-specific LBP seeking primary care physiotherapy were included. Mixed-effects models were used to estimate longitudinal relations between the exposure variables and concurrent measures of outcomes at baseline and 3 months. Logistic regression was used to estimate odds ratios for minimal important difference in outcome.
RESULTS: Higher work ability was associated with less disability -2.6 (95% CI: -3.3, -2.0), less pain: -0.4 (95% CI: -0.5, -0.3), and higher quality of life 0.03 (95% CI: 0.02, 0.04). Increased psychological distress and number of pain sites were associated with higher disability: 10.9 (95% CI: 7.7, 14.1) and 1.9 (95% CI: 0.9, 2.8), higher pain: 1.9 (95% CI: 1.3, 2.5) and 0.4 (95% CI: 0.2, 0.5), and lower quality of life: -0.1 (95% CI: -0.2, -0.1) and -0.02 (95% CI: -0.03, -0.01), respectively. Improvement in work ability showed consistent associations with successful outcome for disability (OR: 4.8, 95% CI: 1.3, 18.1), pain (OR: 3.6, 95% CI: 1.1, 12.1) and quality of life (OR: 4.5, 95% CI: 1.4, 15.1) at 3 months. Reduced psychological distress was associated with improvement in pain only (OR 4.0, 95% CI: 1.3, 12.3).
CONCLUSION: More pain sites, higher psychological distress or lower work ability showed higher disability, more pain, and lower quality of life in patients with low back pain. Only improvement in work ability was consistently related to successful outcomes.
LEVEL OF EVIDENCE: 2.
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