Abstract
Background
Patient-rated measures are the gold standard for assessing spine surgery outcomes, but there is no consensus on the appropriate timing of follow-up. Journals often demand a minimum 2-year follow-up, but the indiscriminate application of this principle may not be warranted. We examined the course of change in patient outcomes up to 5 years postoperatively.
Methods
The data from 3′334 consecutive patients (1′789 women, 1′545 men; aged 61±15 years) undergoing first-time surgery between 1.1.2005 and 31.12.2010 for differing lumbar degenerative disorders were evaluated. The Core Outcome Measures Index (COMI) was completed by 3′124 (94%) patients preoperatively, 3′164 (95%) at 3 months follow-up, 3′153 (95%) at 1 year, 3′112 (93%) at 2 years, and 2′897 (87%) at 5 years. 2′502 (75%) completed COMI at all five timepoints.
Results
The COMI change-score from pre-op to 3 months follow-up correlated significantly with that from pre-op to 12 months (r=0.65;p<0.0001), 24 months (r=0.57;p<0.0001), and 5 years (r=0.51;p<0.0001). COMI decreased significantly from pre-op to 3 months (3.7-points), and from 3 months to 12 months (0.4-points), then levelled off up to 5 years (0.04–0.05 point-change). The course of change up to 12 months differed slightly depending on pathology/whether fusion was done.
Conclusion
Stable COMI scores were seen from 1-year postoperatively onwards. As the early post-operative results appear to herald the long-term outcome, a ‘wait and see policy’ in patients with a poor initial outcome is not advocated. The insistence on a 2-year follow-up could result in a failure to intervene early to achieve better long-term outcomes.
No conflicts of interest
No funding obtained
