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Table 3 Distribution of the improvement of pain scores, comparing the cases to controls at each follow-up

From: Does partial coating with titanium improve the radiographic fusion rate of empty PEEK cages in cervical spine surgery? A comparative analysis of clinical data

  6 months 12 months 18 months
  25th % Median 75th % 25th % Median 75th % 25th % Median 75th %
Cases 2 3 4 3 3 4.5 3.5 5 5
Controls 2 2 3 2.5 3 4 3 4 5
p-value 0.029 0.394 0.121