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Revision surgery according to postoperative lordosis distribution index (LDI). Revision surgery excluding hematoma, infection, and wound dehiscence according to postoperative LDI. Revision rates were lowest in patients with “normal” postoperative LDI (LDI 50–80). LDI ratios refer to the following LDI groups: 50–80, normal distribution; < 50, hypolordotic maldistribution; > 80, hyperlordotic maldistribution.
