Correction: Journal of Orthopaedic Surgery and Research (2023) 18:323 https://doi.org/10.1186/s13018-023-03805-6

Following publication of the original article [1], the abstract section was incorrectly given as “ΔSTEF was selected as the factor associated with JOA improvement in patients ≥ 67 years (odds ratio (OR) 0.95, 95% confidence interval (CI) 0.90–0.99, p = 0.047); in patients < 67 years, Δgrip strength was identified (OR 0.53, CI 0.33‒0.85, p = 0.0086).”, but should have been “ΔSTEF was selected as the factor associated with JOA improvement in patients ≥ 67 years (odds ratio (OR) 1.06, 95% confidence interval (CI) 1.01–1.12, p = 0.0268); in patients < 67 years, Δgrip strength was identified (OR 1.30, CI 1.04‒1.62, p = 0.0049).”

The authors identified an error in Fig. 4. The correct Fig. 4 is given below.

Fig. 4
figure 4

a The independent factor for improvement of JOA score in patients who were over 67 years. Factors associated with ΔSTEF improving JOA in 67 years and older. b The independent factor for improvement of JOA score in patients who were less than 67 years. Factors associated with Δgrip strength improving JOA below 67 years

The original article [1] has been corrected.