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Table 2 Multivariate logistic regression model of risk factors for unfavorable outcomes in the PRO score and the MCID method groups

From: Definitions of unfavorable surgical outcomes and their risk factors based on disability score after spine surgery for lumbar spinal stenosis

CharacteristicsPRO score method MCID method
Odds Ratio(95% Confidence Interval)P valueOdds Ratio(95% Confidence Interval)P value
Age (years)1.032 (0.996–1.069)0.0801.026 (0.990–1.063)0.166
BMI (kg/m2)0.950 (0.875–1.030)0.2130.993 (0.908–1.085)0.874
Sex (Female)2.340 (1.211–4.520)0.0111.496 (0.708–3.162)0.292
Type of surgery (Decompression)  1.161 (0.606–2.225)0.652
Educational level (vs. university)
Elementary school2.875 (1.075–7.688)0.0351.299 (0.481–3.506)0.606
Middle school1.082 (0.456–2.566)0.8590.718 (0.283–1.819)0.485
High school0.859 (0.380–1.943)0.7150.892 (0.372–2.138)0.798
Hypertension1.387 (0.714–2.697)0.334  
Preoperative ODI2.340 (1.211–4.520)0.0280.920 (0.897–0.944)< 0.001
  1. Mean ± standard deviation; PRO score method divided the patients into favorable and unfavorable outcome groups by ODI scores ≤22 and ODI scores > 22, respectively; MCID method divided the patients into more and less-improved outcome groups based on a decrease in ODI scores by greater than 12.8 or less; VAS Visual analog scale; ODI Oswestry disability index