Table 3 Interobserver agreement
From: Reliability of preoperative MRI findings in patients with lumbar spinal stenosis
Parameter | Observer 1 and 2 | Observer 1 and 3 | Observer 1 and 4 | Observer 2 and 3 | Observer 2 and 4 | Observer 3 and 4 | All observers |
|---|---|---|---|---|---|---|---|
Lee grade | 0.82 (0.78–0.86) | 0.88 (0.85–0.91) | 0.90 (0.87–0.93) | 0.78 (0.74–0.83) | 0.82 (0.78–0.86) | 0.86 (0.83–0.90) | 0.85 (0.82–0.87) |
Schizas grade | 0.74 (0.65–0.82) | 0.53 (0.42–0.64) | 0.72 (0.63–0.80) | 0.61 (0.51–0.71) | 0.75 (0.67–0.84) | 0.71 (0.62–0.80) | 0.67 (0.60–0.74) |
Weishaupt grade | 0.72 (0.66–0.78) | 0.23 (0.13–0.32) | 0.39 (0.31–0.48) | 0.22 (0.13–0.31) | 0.48 (0.40–0.56) | 0.30 (0.22–0.39) | 0.39 (0.33–0.45) |
Redundant nerve roots (RNR) | 0.82 (0.76–0.88) | 0.84 (0.78–0.89) | 0.68 (0.60–0.76) | 0.77 (0.70–0.84) | 0.64 (0.55–0.73) | 0.68 (0.60–0.76) | 0.74 (0.69–0.80) |
Intraspinal cysts | 0.97 (0.95–0.98) | 0.98 (0.96–0.99) | 0.98 (0.97–0.99) | 0.98 (0.97–0.99) | 0.98 (0.97–0.99) | 0.99 (0.99–1.0) | 0.98 (0.97–0.99) |
DSCA | 0.86 (0.64–0.93) | 0.88 (0.53–0.95) | 0.91 (0.77–0.95) | 0.91 (0.90–0.93) | 0.92 (0.90–0.94) | 0.96 (0.93–0.97) | 0.91 (0.86–0.94) |