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. 2022 Oct 7;34:404–413. doi: 10.1016/j.jor.2022.10.001

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© 2022 Professor P K Surendran Memorial Education Foundation. Published by Elsevier B.V. All rights reserved.

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Fig. 3 — a. Forest plot of the relative risk (RR) of acetabular cup malposition with regard to anteversion for PSI versus SI (control). Malposition was defined as cup placement outside Lewinnek safe zone for anteversion (15° ± 10°). PSI was associated with lower relative risk of malposition (RR = 0.23, p = 0.005). b. Forest plot of the relative risk (RR) of acetabular cup malposition with regard to inclination for PSI versus SI (control). Malposition was defined as cup placement outside Lewinnek safe zone for inclination (40° ± 10°). PSI was associated with lower relative risk of malposition (RR = 0.12, p < 0.0001).