Table 8.

Incidence of work-related musculoskeletal symptoms among the examined computer users/operators.

Symptoms	Frequency
	KAU (N = 100)					SAUDIA (N = 100)					STC (N = 100)
	None	Some-times	Often	Daily	Total affected∗	None	Some-times	Often	Daily	Total affected∗	None	Some-times	Often	Daily	Total affected∗
Aching	73	18	8	1	27	84	9	6	1	16	69	20	10	1	31
Tingling	84	11	5	0	16	93	5	2	0	7	89	9	3	0	12
Numbness	93	5	1	1	7	92	2	5	1	8	88	4	7	0	11
Burning	95	3	2	0	5	98	0	1	1	2	96	1	3	0	4
Paleness	99	0	0	1	1	100	0	0	0	0	99	1	0	0	1
Swelling	98	1	0	1	2	97	1	1	1	3	97	0	3	0	3
Pain	92	2	3	3	8	84	8	6	2	16	84	6	8	2	16
Stiffness	93	4	2	1	7	91	3	4	2	9	89	4	7	0	11
Cramping	98	1	1	0	2	96	1	2	1	4	98	1	1	0	2
Total	30	47	17	6	70	49	27	21	3	51	39	47	10	4	61

∗The same subject may have more than one symptom occurring at different frequencies.