The subgroup analysis showed a statistically significant difference regarding the adjacent segment ratio between both age groups ( p < 0.05); the differences in degeneration ratio and instability ratio were not significantly different between the two age groups but showed a trend towards a difference ( p -values 0.071 and 0.114, respectively) ( Table 1 ).
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Are Congenital Cervical Block Vertebrae a Risk Factor for Adjacent Segment Disease? A Retrospective Cross-Sectional CT and MR Imaging Study.
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