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Table 3 Univariate and multivariate analysis for predictors of MCID improvement in ODI and/or SRS-22r scores

From: Predictive factors for successful non-operative treatment and achieving MCID improvement in health-related quality of life in adult spinal deformity

Factors

Univariate analysis

Multivariate analysis

Pearson’s correlation coefficient

p-value

Odds ratio for successful treatment (95% CI)

p-value

Outcomes - ODI MCID

Multivariate regression statistics:

X2 = 10.878 (p = 0.004), −2 Log likelihood = 36.214, Cox & Snell R Square = 0.261, Nagelkerke R2 = 0.357

Presence of comorbidities

−0.396

0.014

0.18 (0.03–1.03)

0.054

Range of lateral spinal flexion

−0.417

0.011

0.92 (0.85–1.00)

0.061

Outcomes - SRS-22r MCID

Multivariate regression statistics:

X2 = 14.506 (p = 0.013), −2 Log likelihood = 23.737, Cox & Snell R Square = 0.404, Nagelkerke R2 = 0.543

Trunk shift

0.407

0.028

1.07 (0.96–1.19)

0.204

Pelvic incidence

0.422

0.009

1.05 (0.96–1.15)

0.322

Lateral flexion range

−0.592

<  0.001

0.91 (0.81–1.03)

0.138

EQ-5D-5L anxiety/decompression dimension score

0.361

0.026

2.21 (0.19–25.70)

0.528

SRS-22r total score

−0.435

0.006

0.15 (0.002–10.03)

0.567

Outcomes - Both ODI and SRS-22r MCIDs

Multivariate regression statistics:

X2 = 22.346 (p < 0.001), −2 Log likelihood = 15.282, Cox & Snell R Square = 0.472, Nagelkerke R2 = 0.716

Presence of comorbidities

−0.382

0.018

0.11 (0.01–1.95)

0.131

Lateral flexion range

−0.400

0.016

0.85 (0.71–1.02)

0.073

Presence of spondylolisthesis

0.439

0.007

15.70 (0.72–342.67)

0.080

Physiotherapy prescription

−0.310

0.059

0.01 (< 0.001–0.89)

0.044

  1. MCID Minimal clinically important difference, CI Confidence interval, X2 Chi-square, ODI Oswestry Disability Index, SRS-22r Refined Scoliosis Research Society 22-item, EQ-5D-5L EuroQol 5-Dimension 5-Level