Purpose and background

Although low back pain (LBP) with leg pain, is considered by most a poor prognostic indicator, it is at the same time believed to have a favourable natural resolution, and is often treated along similar lines to non-specific LBP, in line with current guidelines. It is unclear whether patients with LBP and leg pain are a distinct subgroup that might benefit from early identification and targeted interventions. We set out to investigate the impact of LBP with leg pain on health outcomes and health resources compared with that of LBP alone, and to explore which factors contribute to the observed disability outcomes.

Background

Patient preferences have been shown to be associated with treatment effects (1) and recent national guidelines suggest using patient preferences to help inform clinical interventions (2).

Purpose: To evaluate whether the presence of leg pain influences healthcare use and work disability in patients with low back pain (LBP).

Methods: Prospective cohort study of primary care consulters with LBP in North Staffordshire and Cheshire. Patients completed questionnaires at baseline and 12 months, collecting data on back pain, work and healthcare utilisation. At baseline, patients were classified as reporting

LBP only,

Results: 456 patients had complete data and were included in this analysis. At baseline, 191 (42%) reported LBP only, 116 (25%) leg pain above the knee and 149 (33%) leg pain below the knee. In comparison to those with LBP only, patients reporting leg pain below knee were more likely to be referred to secondary care (46% vs 17%, p< 0.01), to re-consult their GP (68% vs 43%, p< 0.01) and to receive physiotherapy (40% vs 21%, p< 0.01) in the 12 months after baseline. At 12 months, those with leg pain below knee were less likely to be employed (67% vs 81%, p=0.01) than patients with LBP alone, more likely to have time off work (55% vs 31%, p< 0.01) or be on reduced work duties.

Conclusions: Self-reported leg pain is common. These patients access significantly more healthcare and are more likely to be off work over 12 months. This highlights the need for early identification of patients with concurrent leg pain and appropriate targeting of interventions to reduce work disability.

Conflicts of Interest: None

Funding source: Arthritis Research Campaign