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Scatter plot for correlations between HPT duration and the changes in Cobb angle and left lung volumes. A negative correlation is evident between HPT duration and changes in Cobb angle (A). Additionally, positive correlations are evident between traction duration and changes in left lung volumes at end inspiration (B) and end expiration (C). HPT, halo-pelvic traction; LLVEI, left lung volume at end inspiration; LLVEE, left lung volume at end expiration.
