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Egyptian Journal of Neurosurgery

Table 3 Comparison between preoperative and postoperative angles (Cobb and Kyphosis)

From: Safety and efficacy of posterior vertebral column resection in complex pediatric deformities

  Preoperative Postoperative Test of Sig.
Immediate After 2 years
COBB (21 cases)
 Mean ± SD. 82.9 ± 23.9 28.8 ± 14.2 30.2 ± 14.9 Fr = 39.975*
 Median (Min.–Max.) 88 (33–140) 29 (7–62) 30 (7–65)  
 Significance between periods p1 < 0.001*, p2 < 0.001*  
 Correction rate and correction loss % 66.9 ± 10.8
4.3 ± 3.1 		 
KYPHOSIS (7cases)
 Mean ± SD. 74.1 ± 15.9 25.4 ± 4.5 26.7 ± 5.2 F = 118.964*
 Median (Min.–Max.) 66 (60–100) 23 (20–33) 25 (20–35)  
 Significance between periods p1 < 0.001*, p2 < 0.001*  
 Correction rate and correction loss % 65.4 ± 2.9
4.8 ± 3.5 		 
  1. Correction rate and loss are bold because as they are the most important information in the table
  2. F: F test (ANOVA) with repeated measures, significance between periods was done using post hoc test (adjusted Bonferroni)
  3. Fr: Friedman test, Sig. bet. periods was done using post hoc test (Dunn's)
  4. p1: p value for comparing between preoperative and immediate postoperative period
  5. p2: p value for comparing between preoperative and 2-year postoperative period
  6. *Statistically significant at p ≤ 0.05
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