Table 4.

Occurrence of non-specific low back pain, depending on the levels of physical activity.

The level of physical activity	Recurrent nsLBP		Chronic nsLBP
	OR (95 %CI)	p	OR (95% CI)	p
Sedentery lifestyle	3.582 (2.549 – 5.033)∗	<0.001	0.110 (0.060 – 0.202)∗∗	<0.001
Moderate	0.086 (0.041 – 0.181)∗∗	<0.001	0.939 (0.532 – 1.659)	0.829
Increased	0.067 (0.021 – 0.217)∗∗	<0.001	0.451 (0.176 – 1.159)	0.098
High	1.512 (1.038 – 2.203)∗	0.031	10.690 (6.646 – 17.195)∗	<0.001

OR- odds ratio,

∗the risk of nsLBP was significantly increased; ∗∗ the risk of nsLBP was significantly decreased (the univariate logistic regression model).