Article Figures & Data
Figures
- Figure 1
Distribution of operation times in the adult spinal deformity cohort (N = 544). Operative times are shown in minutes.
- Figure 2
Survivorship curves for intraoperative infection, cardiopulmonary, and major and minor complications, respectively.
- Figure 3
Kaplan-Meier curve utilizing operative time and major intraoperative complications as the status event.
- Figure 4
Kaplan-Meier curve utilizing operative time and minor intraoperative complications as the status event.
Tables
- Table 1
Summary of demographics and surgeries performed in adult spinal deformity patients.
Demographics N = 544 Woman, % 75.4% Age, y, mean 58.1 Body mass index, mean 28.1 Charlson Comorbidity Index 1.6 Smoker, % 7.2% Previous fusion surgery, % 37.0% Surgeries performed Mean number levels fused 11.4 Approach, % Anterior 0.5% Posterior 85.4% Anterior then posterior 13.9% Three-column osteotomy 49.4% - Table 2
Predictive analytics utilizing decision trees in determining significant clincial variables affecting operative time in adult spinal deformity corrective surgery.
Significant Clinical Variables Affecting Operative Time Overall Rank Variable Name Groups Compared Difference P Value Global 01 Surgery site Centers a,b vs centers c-fCenters c-f vs centers g-j 120.90642.656 0.0000.000 Procedural 02 Approach Comb. vs post. 139.034 0.000 03 Levels fused ≤4 vs 5–95–9 vs 10+ 68.20747.613 0.0140.000 04 Interbody device 0 vs <0 44.710 0.000 11 Number of pedicle screw osteotomies ≥1 vs 0 32.858 0.027 08 Number of 3-column osteotomies used ≥1 vs 0 35.269 0.005 09 Decompression technique used Decmp. vs none 48.651 0.000 Patient Characteristics 05 Frailty index < 1.5 vs ≥ 1.5 78.375 0.000 06 Charlson Comorbidity Index 0 vs <0 66.054 0.000 07 Scoliosis Research Scoiety-22-Schwab Global Alignment 0 vs ++ vs ++ 30.19634.963 0.0250.016 10 Scoliosis Research Society-Schwab PI-LL 0 vs (+ & ++) 46.164 0.000 14 Body mass index <25 vs 25–3025–30 vs ≥30 34.38229.854 0.0070.027 Intraoperative Complications 12 Minor ≥1 vs 0 66.520 0.001 13 Major ≥1 vs 0 66.552 0.001 - Table 3
Spearman correlations determining significant correlations between clinical variables and operative time in adult spinal deformity surgical patients.
Correlation Between Clinical Variables and Operative Time Variable Prediction Accuracy (Spearman Coefficient) Significance (2-Tailed) EBL 0.331 <0.001 LOS 0.263 <0.001 2-y ODI 0.141 0.015 2-y SRS-22 −0.069 0.232 2-y EQ-5D −0.023 0.808 EBL, estimated intraoperative blood loss; EQ-5D, EuroQol 5-dimensional; LOS, hospital length of stay; ODI, Oswestry Disability Index; SRS, Scoliosis Research Society-22.
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