Table 2 Inter-rater agreement between the three raters regarding the degree of degeneration

Variable

Kappa value

p-value

Height loss

0.467

< 0.001

Anterior osteophytes

0.633

0.000

Endplate sclerosis

0.241

0.092

Overall degree of disc degeneration (score 0–9 points)

0.470

< 0.001

Variable

Kappa value

p-value

Joint space narrowing

0.569

< 0.001

Osteophytes

0.313

0.154

Irregularity of articular surface

0.365

0.011

Overall degree of facet joint degeneration (score 0–3 points)

0.542

< 0.001

Variable

Kappa value

p-value

Total degeneration score (0–12 points)

0.695

< 0.001