Table 4.

Interobserver agreement for 3 observers using Bland–Altman for all metrics across OA and non OA study participants

Observers	Measurement	Mean percentage difference between observers	95% limits of agreement	Correlation coefficient
1 versus 2	JSW	− 20.2 (− 39.1, 7.5)	− 38.9, 18.5	0.90 (0.82. 0.95)
	ME	− 5.8 (− 49.1, 38.7)	− 71.7, 60.0	0.94 (0.88, 0.97)
1 versus 3	JSW	− 4.4 (−23.9, 19.2)	− 39.4, 30.5	0.92 (0.86, 0.96)
	ME	− 5.5 (− 36.5, 24.1)	− 48.6, 37.7	0.98 (0.96, 0.99)
2 versus 3	JSW	16.3 (− 11.7, 29.9)	− 26.0, 48.5	0.89 (0.79, 0.94)
	ME	0.5 (− 40.1, 42.1)	− 63.4, 64.4	0.95 (0.91, 0.98)

JSW = joint space width; NWB = non-weight bearing; WB = weight bearing.