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Table 4 Comparison of non-contrast and coloured data sets

From: Evaluation of canine intervertebral disc degeneration in colour-coded computed tomography

Comparison Observer ĸ Limits of confidence p-value of Bowker’s test
Non-contrast : B16 1 0.73 0.72–0.86 0.57
2 0.57 0.47–0.67 0.21
3 0.67 0.60–0.74 0.61
Non-contrast : Spectrum 1 0.74 0.67–0.81 0.92
2 0.51 0.41–0.61 <0.0001***
3 0.67 0.59–0.74 0.77
Non-contrast : Union Jack 1 0.76 0.69–0.83 0.84
2 0.66 0.58–0.74 0.023**
3 0.62 0.55–0.69 0.10
  1. Bowker’s test shows significant differences in evaluation of IVD degeneration between non-contrast and coloured images in observer 2 with p-value: **p < 0.01, ***p < 0.001