Table 8.

Relations between preventive measures. Visual discomfort. And musculoskeletal disorders (2).

Preventive Measures		MSDs Shoulders	MSDs Neck	MSDs Head	MSDs Upper Back	MSDs Lower Back
		Mean	Mean	Mean	Mean	Mean
P 8.1.1 Devices or equipment appropriate for the task being performed	No	4.53	5.86	4.69	5.48	4.91
	Yes	3.67	4.91	3.88	4.77	4.01
	F(B-F)	26.26	32.14	24.63	16.12	28.55
		p < 0.001	p < 0.001	p < 0.001	p < 0.001	p < 0.001
P 8.1.4 Lecterns. footrests or other elements contributing to improve posture in front of the computer	No	3.92	5.17	4.20	4.88	4.42
	Yes	4.20	5.51	4.22	5.31	4.30
	F(B-F)	2.76	3.79	0.012	5.90	0.466
		p = 0.097	p = 0.052	p = 0.914	p = 0.015	p = 0.420
P8.3.1 General Training	No	4.52	6.04	4.95	5.49	4.91
	Yes	3.91	5.14	4.05	4.96	4.27
	F(B-F)	7.09	15.93	16.28	4.90	8.31
		p = 0.008	p < 0.001	p < 0.001	p = 0.028	p = 0.004
P 8.3.3 Training related to the use of other devices	No	4.06	5.35	4.30	5.14	4.47
	Yes	3.71	4.90	3.60	4.51	3.80
	F(B-F)	2.46	4.00	11.09	7.30	9.10
		p = 0.118	p = 0.046	p = 0.001	p = 0.007	p = 0.003

Abbreviations: TM: Technical measure. TRM: Training measure. MSDs: Musculoskeletal disorder. F(BF): Value of the Brown-Forsythe F statistic.