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Table 4 Statistical analysis of the incidence of ASD diagnosed by MRI in different groups of patients

From: Early developed ASD (adjacent segmental disease) in patients after surgical treatment of the spine due to cancer metastases

Group A B C D E F G
Number of ASD diagnosed by MRI according to the Oner, Rijt, and Ramos classifications
N (%) 31 (16) 87 (45) 6 (3) 12 (6) 9 (5) 31 (16) 18 (9)
 ASD N (%) 3 (10) 11 (13) 0 (0) 3 (25) 1 (11) 3 (10) 1 (6)
Number of ASD diagnosed by MRI according to the Pfirrmann and Metzdorf classifications
N (%) 31 (16) 87 (45) 6 (3) 12 (6) 9 (5) 31 (16) 18 (9)
 ASD N (%) 6 (19) 20 (23) 1 (17) 6 (50) 2 (22) 7 (23) 4 (22)
  1. Results are presented as a number and percent
  2. ASD adjacent segment disease
  3. p < 0.05 for inter-group difference χ 2