STUDY DESIGN: Retrospective cohort study. OBJECTIVE: The objective of this study was to investigate the predictive validity of 2 comorbidity indices in a study of @entity1 outcomes following cervical decompression surgery. The comorbidity indices evaluated were the Charlson comorbidity index (CCI) and the self-administered comorbidity questionnaire (SCQ). SUMMARY OF BACKGROUND DATA: Comorbidities have been shown to have independent prognostic factors for HRQOL outcome in @entity1 with @entity74 . However, no appropriate evaluation method of comorbidity has been established in spinal research. METHODS: We retrospectively reviewed 86 cervical @entity602 cases treated by decompression surgery between 2004 and 2010. Health-related quality of life (HRQOL) outcomes were measured using the short form 36 physical component summary (PCS) and the @entity717 ( @entity717 ), administered both pre- and postoperatively. @entity1 comorbidity was evaluated by the CCI and SCQ. The CCI was calculated by the medical record review, whereas the SCQ was obtained from @entity1 ' self-reports. The correlations between HRQOL outcomes and comorbidity indices were investigated. Thereafter, multiple liner regression analyses were performed to assess the performance of these comorbidity indices for predicting @entity86 . RESULTS: The SCQ significantly correlated with both pre- and postoperative PCS scores and both pre- and postoperative @entity717 scores. The CCI did not correlate significantly with any outcome measure. On regression analysis, the CCI was a poor predictor of @entity86 , demonstrating only 0.2% of variance in the PCS score (P=0.25) and only 0.4% of variance in the @entity717 score (P=0.59). In comparison, the SCQ was a significant predictor of @entity86 , demonstrating 4.0% of variance in PCS score (P=0.011) and 10.2% of variance in @entity717 score (P=0.0001). CONCLUSION: The SCQ, but not the CCI, was a robust predictor of @entity86 . Our study suggests that the SCQ score is a more appropriate adjustment for HRQOL outcomes following cervical decompression surgery. LEVEL OF EVIDENCE: 3.

Evaluation of Comorbidity Indices for a Study of XXXX Outcomes Following Cervical Decompression Surgery: A Retrospective Cohort Study.

@entity1 :: ('9606', 'Species') :: ['patients', 'patient', 'Patient'] @entity602 :: ('MESH:D013118', 'Disease') :: ['myelopathy'] @entity86 :: ('MESH:D019106', 'Disease') :: ['postoperative HRQOL'] @entity74 :: ('MESH:D030342', 'Disease') :: ['spinal disorders'] @entity717 :: ('MESH:D009069', 'Disease') :: ['NDI', 'neck disability index']
@entity1 :: (9606,Species) :: ['Patient']
