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IMPLEMENTING STRATIFIED PRIMARY CARE FOR LOW BACK PAIN: COST UTILITY ANALYSIS ALONGSIDE A PROSPECTIVE, POPULATION-BASED, SEQUENTIAL COMPARISON STUDY

The Society for Back Pain Research (SBPR) Annual General Meeting 2014



Abstract

Purpose and background

To explore the cost-utility of implementing stratified care for low back pain (LBP) in general practice, compared with usual care, within patient risk subgroups (low, medium and high risk of persistent disabling pain determined by the STarT Back tool).

Methods

Adopting a cost-utility framework alongside a prospective, sequential comparison of separate patient cohorts (922 patients in total) with six-month follow-up, the base case analysis estimated the incremental LBP-related healthcare cost per additional quality-adjusted life year (QALY) by risk subgroup. Uncertainty was explored with cost-utility planes and acceptability curves. Sensitivity analyses examined alternative approaches (a complete case analysis, the incorporation of non-LBP-related healthcare use and estimation of societal costs relating to work absence).

Results

Stratified care was a dominant treatment strategy compared with usual care for patients at high risk, with mean healthcare cost savings of £124 and an incremental QALY estimate of 0.023. The likelihood that stratified care provides a cost-effective use of resources for patients at low and medium risk is no greater than 60% irrespective of a decision makers' willingness-to-pay for additional QALYs. Patients at medium and high risk of persistent disability in paid employment at six-month follow-up reported, on average, six fewer days of LBP-related work absence in the stratified care cohort compared with usual care (associated societal cost savings per employed patient of £736 and £652, respectively).

Conclusions

At the observed level of adherence to screening tool recommendations for matched treatments, stratified care for LBP is cost-effective for patients at high risk of persistent disabling LBP.

This abstract has not been previously published in whole or substantial part nor has it been presented previously at a national meeting

Conflicts of interest: No conflicts of interest

Sources of funding: The Health Foundation