. 2022 Oct 31;19(21):14254. doi: 10.3390/ijerph192114254

Table 3.

Repeated measure analysis results of quantitative outcome variables.

Repeated Measure Comparisons					Post Hoc Comparisons (Tukey)
Outcome Variable	Variables	Mean ± SD	F	p	Variables		t	p
	VDT_C	39.13 ± 5.86			VDT_C	VDT_S	−2.75	0.026 *
CVA (°)	VDT_S	41.63 ± 7.00	115.30	<0.001 *	VDT_C	VDT_U	−13.72	<0.001 *
	VDT_U	54.52 ± 4.32			VDT_S	VDT_U	−10.53	< 0.001 *
	VDT_C	17.87 ± 1.70			VDT_C	VDT_S	−2.07	0.112
Tone_R_LS (Hz)	VDT_S	18.39 ± 1.57	9.02	<0.001 *	VDT_C	VDT_U	2.36	0.062
	VDT_U	17.24 ± 1.50			VDT_S	VDT_U	3.91	0.001 *
	VDT_C	18.08 ± 1.70			VDT_C	VDT_S	−3.97	0.001 *
Tone_L_LS (Hz)	VDT_S	18.87 ± 1.52	20.41	<0.001 *	VDT_C	VDT_U	2.73	0.027 *
	VDT_U	17.48 ± 1.90			VDT_S	VDT_U	6.01	<0 .001 *
	VDT_C	17.20 ± 1.45			VDT_C	VDT_S	4.55	<0.001 *
Tone_R_SM (Hz)	VDT_S	16.14 ± 1.56	7.53	0.001 *	VDT_C	VDT_U	1.29	0.413
	VDT_U	16.79 ± 1.78			VDT_S	VDT_U	−2.41	0.055
	VDT_C	17.40 ± 1.64			VDT_C	VDT_S	2.91	0.017 *
Tone_L_SM (Hz)	VDT_S	16.59 ± 1.71	3.92	0.025 *	VDT_C	VDT_U	0.92	0.634
	VDT_U	17.07 ± 1.71			VDT_S	VDT_U	−2.16	0.094
	VDT_C	343.82 ± 60.17			VDT_C	VDT_S	−4.23	<0.001 *
Stiffness_L_LS (N/m)	VDT_S	368.97 ± 56.87	11.36	<0.001 *	VDT_C	VDT_U	1.23	0.445
	VDT_U	334.88 ± 66.83			VDT_S	VDT_U	4.11	<0.001 *
	VDT_C	324.79 ± 44.97			VDT_C	VDT_S	3.77	0.002 *
Stiffness_R_SM (N/m)	VDT_S	296.09 ± 46.84	6.08	0.004 *	VDT_C	VDT_U	0.24	0.968
	VDT_U	322.24 ± 54.33			VDT_S	VDT_U	−2.93	0.016 *
	VDT_C	328.32 ± 48.63			VDT_C	VDT_S	3.07	0.012 *
Stiffness_L_SM (N/m)	VDT_S	302.91 ± 56.25	5.28	0.007 *	VDT_C	VDT_U	0.40	0.916
	VDT_U	324.50 ± 51.73			VDT_S	VDT_U	−2.95	0.016 *
	VDT_C	211.68 ± 27.52			VDT_C	VDT_S	0.63	0.805
Stiffness_R_SCM (N/m)	VDT_S	208.53 ± 31.00	3.48	0.037 *	VDT_C	VDT_U	2.95	0.016 *
	VDT_U	200.29 ± 19.43			VDT_S	VDT_U	1.86	0.168
	VDT_C	113.57 ± 16.86			VDT_C	VDT_S	1.95	0.142
R_PSV (cm/s)	VDT_S	109.82 ± 16.37	4.80	0.012 *	VDT_C	VDT_U	−1.47	0.319
	VDT_U	116.40 ± 20.81			VDT_S	VDT_U	−2.71	0.029 *

Abbreviations: CVA, craniovertebral angle; R, right; L, left; LS, levator scapulae; SM, suboccipital muscles; SCM, sternocleidomastoid; RT, reaction time; PSV, peak systolic velocity; VDT_C, conventional visual display terminal workstation; VDT_S, support visual display terminal workstation; VDT_U, upright visual display terminal workstation; SD, standard deviation. * Statistically significant difference: p < 0.05.