Table 3.

Multivariate analysis of the factors related to sick leave

Sick leave (N=202)
Variables	Wald statistic	OR (95% CI)	p Value
Educational level
No education received*
Primary studies	1.44	3.89 (0.42 to 35.74)	0.230
Secondary studies	1.94	4.74 (0.53 to 42.34)	0.164
Vocational training	5.61	14.71 (1.59 to 136.24)	0.018
University studies	6.13	16.70 (1.80 to 155.07)	0.013
The individual needs assistance in grooming and dressing because of their pain
No*			0.002
Yes	9.50	2.98 (1.49 to 5.98)
The individual considers that his/her pain affects his/her family
No*			0.026
Yes	4.97	2.18 (1.10 to 4.34)
Duration of pain (months)	4.16	0.99 (0.99 to 1.00)	0.041
The individual is currently taking pain relief medication
No*
Yes	3.96	2.18 (1.01 to 4.72)	0.047

*reference category.

Hosmer-Lemeshow χ²=3.333; gl=2; p=0.975.