In multivariable analysis adjusting for Outerbridge grade and other confounders, the ≥3 zone group showed a trend towards reduced odds of achieving MCID (OR = 0.43, 95% CI: 0.18–1.02).
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In multivariable analysis adjusting for Outerbridge grade and other confounders, the ≥3 zone group showed a trend towards reduced odds of achieving MCID (OR = 0.43, 95% CI: 0.18–1.02).