Table 2.

Characteristics of the employees' sample: gender, age, and duration of daily VDT use at various workplaces (> 1 h/d)

Workplace	Gender	Number* (n)	Age		Daily VDT work		Percentage of all
			(years)	(± sd)	(hours)	(± sd)	(%)
Office	Female	306	38.8	10.8	5.9	2.1	28.9
	Male	497	41.5	9.0	5.4	2.1	46.9
	Total	803	40.5	9.5	5.6	2.1	75.8
Laboratory	Female	65	37.6	8.9	4.0	2.2	6.1
	Male	94	39.0	9.7	3.1	1.6	8.9
	Total	159	38.4	9.4	3.5	1.9	15.0
Storehouse/production	Female	5	30.6	5.6	3.5	1.0	0.5
	Male	77	38.1	9.0	3.9	2.5	7.3
	Total	82	37.6	9.0	3.9	2.5	7.7
Miscellaneous	Female	5	28.8	9.4	3.1	2.0	0.5
	Male	11	41.4	11.2	5.2	3.8	1.0
	Total	16	37.4	12.0	4.6	3.5	1.5
All	Female	381	38.3	9.9	5.5	3.2	35.9
	Male	679	40.8	9.2	4.9	2.3	64.1
	Total	1,060*	39.9	9.5	5.1	2.3	100.0

* 5 subjects didn't indicate their age