Table 4.

Employment status of participants after presentation to the clinic

		Groups a and b		Groups c and d		P
		n: 92	%	n: 106	%
P values calculated using a chi-square test.
Age	<35	32	42	44	57	.33
	≥35	60	49	62	50
Gender	Male	84	49	86	50	.04
	Female	8	28	20	71
Duration of work
<5years		28	40	42	60	.39
5-10 years		25	48	27	52
>10 years		39	52	36	48
Education
Primary or secondary school		28	36	48	63	.04
High school or university		64	52	58	47
Union membership
Yes		60	77	17	22	.001
No		32	26	89	73
Workplace size
<50 employees		26	28	66	71	.001
>51 employees		66	62	40	37
Diagnosis of OD
Yes		57	39	89	61	.001
No		35	67	17	32