Long-term patient-related quality of life outcomes and ICD-10 symptom rating (ISR) of patients with pyogenic vertebral osteomyelitis: What is the psychological impact of this life-threatening disease?

PURPOSE

We aimed to evaluate the long-term impact of the treatment of pyogenic vertebral osteomyelitis (VO) on functional outcomes and patients' quality of life (QoL) with a special focus on psychological well-being.

METHODS

A total of 156 patients with VO with a minimum clinical follow-up of 12 months were retrospectively identified and asked to participate. Patient-reported outcome measures were evaluated with the EuroQol five-dimension questionnaire (EQ-5D) and German Short-Form 36 (SF-36) outcome instruments as well as with an ICD-10 based symptom rating (ISR) and compared to normative data. Spine-specific outcomes were assessed with the Core Outcome Measure Index and the Oswestry disability index (ODI) or the Neck disability index (NDI), respectively.

RESULTS

From n = 156 eligible patients, n = 129 patients could be contacted and n = 40 returned questionnaires, yielding a response rate of 31.0%. The mean time from hospital discharge to follow-up was 83.0 ± 3.8 (13-193) months. Spine-specific outcomes showed mild to moderate disability. The mean physical health component score of the SF-36 (37.1 ± 16.7), the mean mental health component score (38.2 ± 14.0) and the mean EQ-5D VAS rating (57.1 ± 21.5) were significantly lower in comparison with the scores of an age-matched reference population (all p < 0.05). The mean total score of the ISR was 0.53 ± 0.23. On average, the cohort did not cross the threshold of clinically relevant symptom burden on any subscale.

CONCLUSION

Even almost seven years on average after completed treatment of VO, patients report impaired QoL. Assessment of psychological disorders should be implemented in clinical practice and future prospective studies.