HEALTH RELATED QUALITY OF LIFE (EQ-5D) BEFORE AND AFTER LUMBAR SPINAL STENOSIS SURGERY

Abstract

Introduction: Although decompressive surgery of spinal stenosis is a common procedure in spine surgery, there are no studies assessing patients’ perceived health related quality of life (HRQOL) by EQ-5D. An objective was to describe status overall and by analyzing pre- and one year postoperative health related quality of life (HRQOL) by the EQ-5D instrument in patients operated on for lumbar spinal stenosis. This cohort was compared to a Swedish population EQ-5D survey.

Methods: Data were obtained from the National Swed-ish Registry for lumbar spine operations 2001–2002. On 230 patients (mean age 66 years, 53% females) operated on for lumbar spinal stenosis the primary outcome measures were pre- and postoperative EQ-5D data. In addition, patient and disease characteristics (pain and walking ability) were reported. Analysis of variance (ANOVA) was performed and the relative differences pre-and postoperatively compared to a Swedish population survey were calculated.

Results: The majority of patients experienced an improved and their EQ-5D score increased from 0.36 to 0.64 one year after operation. However, they did not reach the level reported by an age- and gender matched population sample (mean difference 0.18). Woman had lower pre- and postoperatively EQ-5D scores than men. Preoperative severe pain was a significant predictor for a lower postoperative EQ-5D score. Four out of ten reported considerable improvement while a similar portion of patients (41%) with high preoperative scores were slightly improved. A third group (14%) were unchanged with low EQ-5D scores, and a few (4%) perceived a decline in their HRQOL. The mean VAS rating of leg- and back pain improved one year after operation by 28 and 29 %, respectively. The proportion of patients able to walk longer than 500 m increased from 25 % preoperatively to 65 % postoperatively.

Conclusions: Our national Swedish representatively cohort of disc herniation patients has a remarkable low EQ-5D scores preoperatively. However their HRQOL improved considerably in 80 % of the patients one year after surgery. The health related quality of life improves after surgery for lumbar spinal stenosis, approaching the population reference level. It is of most importance to further investigate the risk factors behind the less favourable outcomes in health related quality of live (EQ-5D score) in women.