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Do 1-year outcomes predict 2-year outcomes for adult deformity surgery?
Spine J. 2009 Apr; 9(4):317-22.SJ

Abstract

BACKGROUND CONTEXT

Health-related quality-of-life (HRQOL) measures are being used more frequently in the evaluation of the adult deformity patient. This is due in part to the validation of the deformity-specific Scolios Research Society-22 (SRS-22). Hence, relationships between HRQOL outcomes and traditional measures of success such as deformity correction, fusion healing, and complications are being established.

PURPOSE

To examine the pattern of HRQOL outcome responses after adult deformity surgery.

STUDY DESIGN

Analysis of prospective multicenter cohort.

PATIENT SAMPLE

Two hundred and eighty-three adult deformity patients with preoperative, 1-, and 2-year postoperative outcome measures.

OUTCOME MEASURES

SRS-22, Short Form-12 (SF-12), Oswestry Disability Index (ODI), and back and leg pain numeric rating scale scores.

METHODS

Preoperative versus postoperative health status measures were evaluated by matched-pairs sample t test statistics and post hoc analysis of variance (ANOVA) findings.

RESULTS

SRS-22 improved from a mean 3.03 points at baseline to 3.21 points at 6 months, 3.71 points at 1 year, and 3.70 points at 2 years post-op. Mean ODI score was 37.0 points pre-op and improved to 27.0 points at 6 months, and 22.8 points at 1 and 2 years post-op. Mean SF-12 physical component score was 33.7 points at baseline, improving to 36.9 points at 6 months, 40.6 points at 1 year, and 40.5 points at 2 years post-op. Paired samples analysis comparing 6-month and 1-year post-op scores showed deterioration for numeric rating scale leg pain (p=0.05). There was a trend for improvement in SF-12 physical component score (p=0.06). Significant improvement between 6 months and 1 year post-op was noted for ODI (p=0.02) and SRS total score (p<0.0001). Comparison of 1- versus 2-year postoperative scores revealed no statistically significant differences for any of the HRQOL parameters.

CONCLUSIONS

This study supports the application of HRQOL measures, including the deformity-specific SRS-22, as a valuable tool in the assessment of adult deformity patients. Change in outcome score stabilized after the 1-year postoperative interval, for most patients.

Authors+Show Affiliations

Leatherman Spine Center, Louisville, KY 40202, USA. tallgeyer@spinemds.comNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article
Multicenter Study
Research Support, Non-U.S. Gov't
Validation Study

Language

eng

PubMed ID

18774752

Citation

Glassman, Steven D., et al. "Do 1-year Outcomes Predict 2-year Outcomes for Adult Deformity Surgery?" The Spine Journal : Official Journal of the North American Spine Society, vol. 9, no. 4, 2009, pp. 317-22.
Glassman SD, Schwab F, Bridwell KH, et al. Do 1-year outcomes predict 2-year outcomes for adult deformity surgery? Spine J. 2009;9(4):317-22.
Glassman, S. D., Schwab, F., Bridwell, K. H., Shaffrey, C., Horton, W., & Hu, S. (2009). Do 1-year outcomes predict 2-year outcomes for adult deformity surgery? The Spine Journal : Official Journal of the North American Spine Society, 9(4), 317-22. https://doi.org/10.1016/j.spinee.2008.06.450
Glassman SD, et al. Do 1-year Outcomes Predict 2-year Outcomes for Adult Deformity Surgery. Spine J. 2009;9(4):317-22. PubMed PMID: 18774752.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Do 1-year outcomes predict 2-year outcomes for adult deformity surgery? AU - Glassman,Steven D, AU - Schwab,Frank, AU - Bridwell,Keith H, AU - Shaffrey,Christopher, AU - Horton,William, AU - Hu,Serena, Y1 - 2008/09/06/ PY - 2008/03/31/received PY - 2008/06/26/accepted PY - 2008/9/9/pubmed PY - 2009/5/12/medline PY - 2008/9/9/entrez SP - 317 EP - 22 JF - The spine journal : official journal of the North American Spine Society JO - Spine J VL - 9 IS - 4 N2 - BACKGROUND CONTEXT: Health-related quality-of-life (HRQOL) measures are being used more frequently in the evaluation of the adult deformity patient. This is due in part to the validation of the deformity-specific Scolios Research Society-22 (SRS-22). Hence, relationships between HRQOL outcomes and traditional measures of success such as deformity correction, fusion healing, and complications are being established. PURPOSE: To examine the pattern of HRQOL outcome responses after adult deformity surgery. STUDY DESIGN: Analysis of prospective multicenter cohort. PATIENT SAMPLE: Two hundred and eighty-three adult deformity patients with preoperative, 1-, and 2-year postoperative outcome measures. OUTCOME MEASURES: SRS-22, Short Form-12 (SF-12), Oswestry Disability Index (ODI), and back and leg pain numeric rating scale scores. METHODS: Preoperative versus postoperative health status measures were evaluated by matched-pairs sample t test statistics and post hoc analysis of variance (ANOVA) findings. RESULTS: SRS-22 improved from a mean 3.03 points at baseline to 3.21 points at 6 months, 3.71 points at 1 year, and 3.70 points at 2 years post-op. Mean ODI score was 37.0 points pre-op and improved to 27.0 points at 6 months, and 22.8 points at 1 and 2 years post-op. Mean SF-12 physical component score was 33.7 points at baseline, improving to 36.9 points at 6 months, 40.6 points at 1 year, and 40.5 points at 2 years post-op. Paired samples analysis comparing 6-month and 1-year post-op scores showed deterioration for numeric rating scale leg pain (p=0.05). There was a trend for improvement in SF-12 physical component score (p=0.06). Significant improvement between 6 months and 1 year post-op was noted for ODI (p=0.02) and SRS total score (p<0.0001). Comparison of 1- versus 2-year postoperative scores revealed no statistically significant differences for any of the HRQOL parameters. CONCLUSIONS: This study supports the application of HRQOL measures, including the deformity-specific SRS-22, as a valuable tool in the assessment of adult deformity patients. Change in outcome score stabilized after the 1-year postoperative interval, for most patients. SN - 1878-1632 UR - https://www.unboundmedicine.com/medline/citation/18774752/Do_1_year_outcomes_predict_2_year_outcomes_for_adult_deformity_surgery L2 - https://linkinghub.elsevier.com/retrieve/pii/S1529-9430(08)00714-6 DB - PRIME DP - Unbound Medicine ER -