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Table 2 Statistical analysis of the correlation between cervical pillar hyperplasia and degenerative joint disease in an age-matched sample (n = 320). Abbreviations defined: hyp = hyperplasia; IVD levels = number of intervertebral disc levels involved; facet levels = number of facet levels involved.

From: Inter-examiner reliability of the diagnosis of cervical pillar hyperplasia (CPH) and the correlation between CPH and spinal degenerative joint disease (DJD)

  Age Category (years)
  40–44 45–49 50–54 55–59
Statistics # of levels IVD levels Facet levels # of levels IVD levels Facet levels # of levels IVD levels Facet levels # of levels IVD levels Facet levels
χ hyp 2.5 1.1 1.4 2.75 1.3 1.45 3.35 1.85 1.5 5.15 2.2 2.95
χ nonhyp 2.4 1.2 1.2 2.8 1.45 1.35 3.05 1.55 1.5 4.95 2.15 2.8
t-statistic 0.1738 -0.3121 0.4595 -0.0741 -0.4088 0.2038 0.4204 0.7457 0 -0.3012 -0.1151 -0.3266
p-value 0.863 0.757 0.648 0.941 0.685 0.84 0.677 0.46 1 0.765 0.909 0.746
  Age Category (years)
  60–64 65–69 70–74 over 75
Statistics # of levels IVD levels Facet levels # of levels IVD levels Facet levels # of levels IVD levels Facet levels # of levels IVD levels Facet levels
χ hyp* 4.25 1.75 2.5 5.8 2.25 3.55 6.9 2.7 4.2 7.15 2.65 4.5
χ nonhyp 5.9 2.45 3.45 5.45 2.2 3.25 7.7 3.05 4.65 8.15 3.3 4.85
t-statistic -2.4139 -1.9553 -1.9975 0.4537 0.1111 0.5828 -1.4356 -0.9358 -1.2695 1.9015 1.7786 1.2147
p-value 0.021 0.058 0.053 0.653 0.912 0.563 0.159 0.355 0.212 0.065 0.083 0.232