Are patients who return for 10-year follow-up after AIS surgery different from those who do not?

Tracey P. Bastrom, Roland Howard, Carrie E. Bartley, Peter O. Newton, Lawrence G. Lenke, Paul D. Sponseller, Harry Shufflebarger, Baron Lonner, Suken A. Shah, Randal Betz, Burt Yaszay

Research output: Contribution to journalArticlepeer-review

Abstract

Purpose: To evaluate the impact of patients lost to follow-up on outcomes of surgery for adolescent idiopathic scoliosis (AIS) at 10-year postoperative. Methods: Preoperative, 2-year, and 5-year postoperative demographic, radiographic, and SRS-22 data from a prospective multi-center registry were compared between patients with a 10-year follow-up visit versus those without. A second analysis utilized variables that were different between the groups, along with SRS scores, in a cohort of patients with preoperative, 2-, 5-, and 10-year postoperative SRS scores (complete cohort) to impute missing 10-year data (imputed cohort) utilizing Markov chain Monte Carlo simulation. Results: 250 patients had 10-year follow-up (21%). Those with 10-year follow-up had a greater percentage of patients who underwent anterior procedures (p < 0.05). Radiographically, the groups were similar at all three time points. SRS-22 scores demonstrated slightly worse pain and function preoperatively and at 2 year in those lost to follow-up (effect size eta = 0.11–0.12), with no differences at 5 year. Imputed data analysis demonstrated similar trends over time in SRS-22 scores compared to the complete cohort for total score and all domains except pain. There was no significant difference in imputed versus complete 10-year SRS-22 scores (p > 0.05). Conclusion: This study identified early differences between patients with 10-year follow-up and those without, though effect sizes were small and non-existent at 5 years. SRS-22 scores at 10 year between the complete and imputed data sets did not differ. Clinically relevant outcomes of the subset who followed-up at 10 year are likely generalizable to the entire eligible AIS population.

Original languageEnglish (US)
Pages (from-to)527-535
Number of pages9
JournalSpine deformity
Volume10
Issue number3
DOIs
StatePublished - May 2022
Externally publishedYes

Keywords

  • Adolescent idiopathic scoliosis
  • Long-term follow-up
  • Loss to follow-up
  • Patient reported outcomes

ASJC Scopus subject areas

  • Orthopedics and Sports Medicine

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