Table 2.

Intraobserver and interobserver differences and limits of agreement

	Intraobserver obs1 (ss1–ss2)			Intraobserver obs2 (ss1–ss2)			Interobserver ss1 (obs1–obs2)			Interobserver ss2 (obs1–obs2)
	φ	θ	ψ	φ	θ	ψ	φ	θ	ψ	φ	θ	ψ
Mean	0.5	0.7	−0.7	1.3	−0.1	−0.5	−0.1	−0.4	−0.3	0.7	−1.2	0.0
Standard deviation	5.5	2.8	3.1	4.1	2.8	1.0	5.3	2.8	2.9	4.3	3.9	1.4
Median	0.0	0.0	−0.2	0.7	−0.2	−0.6	0.0	−0.3	0.2	−0.4	−0.1	−0.1
25-percentile	−1.3	−0.5	−1.1	−0.8	−1.9	−1.0	−1.5	−1.5	−0.8	−1.6	−1.9	−0.9
75-percentile	2.1	0.8	0.5	3.4	2.6	0.1	1.9	0.7	0.9	3.1	1.2	1.2
Interquartile range	3.4	1.3	1.6	4.2	4.5	1.1	3.4	2.2	1.6	4.8	3.1	2.1
Minimum	−17.7	−3.0	−15.6	−4.7	−5.9	−2.5	−15.3	−6.9	−13.7	−7.9	−12.5	−2.8
Maximum	19.5	10.6	2.6	16.9	3.9	2.0	17.9	8.0	3.0	14.3	4.0	2.8
Range	37.2	13.6	18.3	21.7	9.8	4.5	33.2	14.9	16.7	22.2	16.5	5.6

Observer  1 and 2 (obs1, obs2). Session 1and 2 (ss1,ss2).