Table 4.

Contrast estimate results from sway velocities intensities GEE model

Label	Estimate ± SE	95% CL		χ2	P-value
Between—group differences at different bevel degrees
Minor SBO vs. Control at 0°	2.7636 ± 0.3707	2.0370	3.4902	55.57	< 0.0001
Major SBO vs. Control at 0°	4.0881 ± 0.6000	2.9121	5.2640	46.42	< 0.0001
Minor vs. Major SBO at 0°	−1.3244 ± 0.6970	−2.6905	0.0416	3.61	0.0574
Minor SBO vs. Control at 10°	0.3471 ± 0.4072	−0.4509	1.1452	0.73	0.3939
Major SBO vs. Control at 10°	2.3027 ± 0.4405	1.4393	3.1662	27.32	< 0.0001
Minor vs. Major SBO at 10°	−1.9556 ± 0.5932	−3.1181	−0.7930	10.87	0.0010
Minor SBO vs. Control at 20°	0.2851 ± 0.3911	−0.4814	1.0515	0.53	0.4660
Major SBO vs. Control at 20°	2.1100 ± 0.4665	1.1958	3.0243	20.46	< 0.0001
Minor vs. Major SBO at 20°	−1.8250 ± 0.5939	−2.9891	−0.6609	9.44	0.0021
Within—group variations
Minor SBO, 10° vs. 0°	−1.6825 ± 0.3713	−2.4102	−0.9549	20.54	< 0.0001
Minor SBO, 20° vs. 0°	−0.4143 ± 0.3315	−1.0641	0.2355	1.56	0.2114
Major SBO, 10° vs. 0°	−1.0514 ± 0.4825	−1.9972	−0.1056	4.75	0.0293
Major SBO, 20° vs. 0°	0.0862 ± 0.4749	−0.8444	1.0169	0.03	0.8559
Control, 10° vs. 0°	0.7340 ± 0.0979	0.5420	0.9259	56.18	< 0.0001
Control, 20° vs. 0°	2.0643 ± 0.1467	1.7768	2.3518	198.03	< 0.0001

Contrasts and estimates were statistically assessed in the GEE model listed in Table 3 by using SAS 9.13

GEE Generalized estimating equations, SE standard error, CL confidence limits