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Table 2 Wilcoxon rank-sum test comparing LMA between different intervertebral levels or sides of the scoliosis

From: Correlation between multifidus muscle atrophy, spinopelvic parameters, and severity of deformity in patients with adult degenerative scoliosis: the parallelogram effect of LMA on the diagonal through the apical vertebra

Variables Goutallier grade Concave side Convex side Z value (convex-concave) P value
Upper intervertebral level 0 0 11 − 7.616 < 0.001
1 5 6   
2 17 49   
3 66 44   
4 44 22   
Lower intervertebral level 0 0 6 − 2.345 0.019
1 6 5   
2 16 11   
3 66 33   
4 44 77   
Z value (lower-upper)   − 0.093 − 7.049   
P value   0.926 < 0.001   
  1. LMA lumbar multifidus muscle atrophy