Table 5.

Risk of surgically treated CTS in socio-occupational categories stratified according to biomechanical exposure (in terms of at least 1 plausible risk factor)

			Univariate	Multivariate*
	Cases	Controls	OR (95% CI)	OR (95% CI)
White-collar workers
Not exposed	16	122	1.0	1.0
Exposed	3	12	1.9 (0.5-7.6)	2.1 (0.5-9.5)
Blue-collar/housewife status
Not exposed	66	93	5.4 (2.8-10.3)	5.1 (2.6-9.9)
Exposed	106	59	13.7 (6.6-28.3)	12.8 (6.4-25.3)

*Unconditional logistic regression model adjusted for the individual factors entered in the multivariate model reported in Table 1 (ie BMI, height, alcohol, family history of CTS, rheumatoid arthritis, trigger finger and diabetes), as well as age, gender and center.