Table 7.

Relations between preventive measures, visual discomfort, and MSDs (1).

Preventive Measures		Visual Discomfort	MSDs Fingers	MSDs Wrists	MSDs Elbows	MSDs Legs
		Mean	Mean	Mean	Mean	Mean
TM1. Appropriate devices or equipment for the task being performed	No	3.96	2.70	3.18	2.38	3.39
	Yes	3.36	2.09	2.38	2.05	2.69
	F (B-F)	20.8	23.26	33.79	8.42	21.97
		p < 0.001	p < 0.001	p < 0.001	p = 0.004	p < 0.001
TM4. Lecterns, footrests, or other elements contributing to improve posture in front of the computer	No	3.50	2.39	2.63	2.20	2.92
	Yes	3.76	2.26	2.82	2.17	3.04
	F (B-F)	3.78	1.08	2.20	0.045	0.651
		p = 0.052	p = 0.297	p = 0.138	p = 0.831	p = 0.420
TRM1. General Training	No	4.20	2.68	3.03	2.56	3.12
	Yes	3.48	2.27	2.63	2.11	2.94
	F(B-F)	17.77	5.31	4.22	7.22	0.84
		p < 0.001	p = 0.022	p = 0.041	p = 0.008	p = 0.362
TRM3. Training related to the use of other devices	No	3.65	2.37	2.74	2.19	3.04
	Yes	3.32	2.15	2.44	2.16	2.55
	F(B-F)	3.82	2.08	2.96	0.033	7.31
		p = 0.052	p = 0.150	p = 0.086	p = 0.855	p = 0.007

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