TABLE 3.

Descriptive statistics and the effect of age group, gender, and interaction between the two on test metrics

Test	Metrics	Descriptive statistics			ANOVA
					(1)		(2)		(3)
		N	Mean	SD	Age group		Gender		Age group		Gender		Age × gender
					F	P‐value	F	P‐value	F	P‐value	F	P‐value	F	P‐value
OKN 20 deg/s	Average eye velocity CCW (deg/s)	286	−16.88	1.91	2.776	0.097	0.395	0.530	4.091	0.044	0.059	0.808	1.744	0.188
	Average eye velocity CW (deg/s)	286	17.66	1.34	1.077	0.300	0.774	0.380	0.908	0.341	0.065	0.799	0.340	0.560
	Gain	286	0.86	0.08	2.440	0.119	0.346	0.557	2.168	0.142	0.832	0.362	0.162	0.687
	Gain asymmetry (%)	286	2.27	4.60	0.114	0.735	0.941	0.333	0.127	0.721	0.337	0.562	3.227	0.074
	Area under velocity fit +(30 deg)	286	8172	1452	0.035	0.853	0.164	0.685	0.017	0.896	0.058	0.810	0.012	0.915
	Area under velocity fit ‐(30 deg)	286	−8525	1378	0.423	0.516	0.707	0.401	0.346	0.557	0.611	0.435	0.028	0.868
OKN 60 deg/s	Average eye velocity CCW (deg/s)	447	−38.27	8.71	14.709	0.000	0.118	0.731	11.961	0.001	0.004	0.949	0.382	0.537
	Average eye velocity CW (deg/s)	447	41.65	8.85	0.118	0.731	0.247	0.620	18.978	0.000	0.077	0.782	0.180	0.672
	Gain	447	0.68	0.13	24.273	0.000	0.279	0.598	22.025	0.000	0.064	0.801	0.005	0.942
	Gain asymmetry (%)	447	4.02	7.21	0.056	0.813	0.009	0.925	0.437	0.509	0.000	0.998	2.006	0.157
	Area under velocity fit +(30 deg)	447	8564	1461	0.442	0.506	0.680	0.410	0.092	0.762	0.490	0.484	0.834	0.362
	Area under velocity fit ‐(30 deg)	447	−8499	1315	4.073	0.044	2.211	0.138	3.831	0.051	2.781	0.096	0.071	0.790
SHA 0.02 Hz	Gain average	296	0.42	0.12	0.527	0.468	0.455	0.501	1.112	0.293	0.014	0.906	1.107	0.294
	Asymmetry (%)	296	4.24	10.89	1.861	0.174	0.024	0.878	1.644	0.201	0.030	0.862	0.001	0.978
	Phase (deg)	296	21.37	6.20	0.471	0.493	0.564	0.453	0.444	0.506	1.651	0.200	0.721	0.396
SHA 0.64 Hz	Gain average	295	0.58	0.14	0.119	0.730	0.011	0.915	0.556	0.456	0.487	0.486	1.670	0.197
	Asymmetry (%)	295	−2.57	7.81	0.218	0.641	0.164	0.685	0.658	0.418	0.135	0.713	1.294	0.256
	Phase (deg)	295	4.30	4.60	0.112	0.738	5.172	0.024	0.444	0.506	1.651	0.200	0.721	0.396
VE 0.64 Hz	Gain average	295	0.98	0.08	1.751	0.187	0.026	0.872	2.530	0.113	0.627	0.429	1.308	0.254
	Asymmetry (%)	295	0.34	1.51	1.198	0.275	1.478	0.225	1.535	0.216	1.990	0.159	0.617	0.433
	Phase (deg)	295	0.09	1.75	1.839	0.176	0.092	0.762	0.848	0.358	1.040	0.309	1.477	0.225
VS 0.64 Hz	Gain average	290	0.14	0.04	0.048	0.827	0.122	0.727	0.179	0.672	0.011	0.917	0.390	0.533
	Asymmetry (%)	290	1.29	11.40	2.649	0.105	0.407	0.524	0.003	0.959	3.586	0.059	1.050	0.306
	Phase (deg)	290	12.67	10.05	0.378	0.539	2.382	0.124	0.389	0.533	1.732	0.189	0.038	0.845
crHIT	Gain	299	0.96	0.03	0.702	0.403	3.399	0.066	0.843	0.359	2.096	0.149	0.524	0.470
	Asymmetry (%)	299	−0.17	2.12	0.003	0.953	0.405	0.525	0.333	0.565	2.170	0.142	2.431	0.120
SVV	Mean error (deg)	446	0.09	1.49	1.575	0.210	0.366	0.545	1.102	0.294	0.486	0.486	0.269	0.605
SVH	Mean error (deg)	291	−0.13	1.45	0.697	0.404	0.112	0.738	0.393	0.531	0.007	0.935	0.273	0.602

Note: Mean and standard deviation (SD) are presented for each test metric. Effects of age group (1), gender (2) on test metrics are calculated using one‐way ANOVA. Effects of the interaction between the age group and gender (3) are calculated using two‐way ANOVA. The t‐test‐based results examining the effect of age and gender are not reported in this paper. However, it should be noted that these results, as expected, are consistent with those of one‐way ANOVA.