Fig. 1

Fusion status as terminal visit. Terminal visits were divided into post-operative time periods: at 6 months, > 6–12 months, and > 12 months. The X-axis describes the number of patients at each surgical level in the respective terminal visit time period. The Y-axis describes the percent of patients at each surgical level for each terminal time period that had Lenke fusion A, B, C, or D. a For the terminal visits at 6 months, 96% of patients were considered fused (80 Lenke A and 16% Lenke B), while 4% were not fused (Lenke C). b For patients who had post-operative terminal visits > 6–12 months, 100% were considered fused (76% Lenke A and 24% Lenke B). c For the patients whose terminal visit happened after 12 months post-operatively, 98% were considered fused (83% Lenke A, 15% Lenke B, 2% Lenke D)