Table 4.

Inter- and intraobserver agreement for fracture involvement determined using six measurement methods.

Examiner	Plain radiographs	Axial CT linear	Sagittal CT linear	Axial CT plane	3D CT linear	3D CT surface
Chief-chief	0.82 (0.74–0.87)	0.89 (0.85–0.93)	0.88 (0.83–0.92)	0.92 (0.88–0.94)	0.91 (0.88–0.94)	0.94 (0.92–0.96)
Attending-attending	0.77 (0.68–0.84)	0.92 (0.88–0.94)	0.85 (0.78–0.89)	0.96 (0.94–0.97)	0.91 (0.87–0.94)	0.95 (0.93–0.97)
Resident-resident	0.46 (0.30–0.60)	0.90 (0.86–0.93)	0.82 (0.75–0.88)	0.94 (0.91–0.96)	0.88 (0.82–0.91)	0.91 (0.88–0.94)
Chief-attending	0.41 (0.24–0.55)	0.79 (0.70–0.85)	0.73 (0.63–0.81)	0.66 (0.53–0.75)	0.84 (0.78–0.89)	0.95 (0.93–0.97)
Chief-resident	0.43 (0.26–0.57)	0.68 (0.56–0.77)	0.52 (0.37–0.65)	0.70 (0.59–0.78)	0.81 (0.74–0.87)	0.95 (0.93–0.97)
Attending-resident	0.67 (0.55–0.76)	0.70 (0.59–0.79)	0.59 (0.45–0.70)	0.60 (0.46–0.71)	0.83 (0.76–0.88)	0.90 (0.86–0.93)

Values are presented as intraclass correlation coefficient values with 95% confidence interval; agreement was divided into 6 levels, including almost perfect (0.81 to 1.00), substantial (0.61–0.80), moderate (0.41 to 0.60), fair (0.21 to 0.40), slight (0.00 to 0.20), and poor (below 0.00).