Table 2.

Association between chronic LBP and degree of stress on multiple logistic regression analysis.

	Model 1			Model 2			Model 3
	OR	95% CI	P-value	OR	95% CI	P-value	OR	95% CI	P-value
Degree of stress
None	1			1			1
Mild	1.20	1.03–1.41	0.024	1.57	1.34–1.85	< 0.001	1.55	1.32–1.83	< 0.001
Moderate	2.28	1.89–2.75	< 0.001	2.74	2.27–3.32	< 0.001	2.55	2.1–3.1	< 0.001
Severe	2.60	1.95–3.47	< 0.001	3.26	2.4–4.43	< 0.001	2.83	2.1–3.83	< 0.001

Model 1, no adjustments for other variables; Model 2, adjustments for sex and age; and Model 3, adjustments for sex, age, and other environmental factors, such as obesity, sleep duration, smoking, alcohol consumption, education level, household income, occupation, physical activity, and comorbidities.

CI confidence interval, LBP low back pain, OR odds ratio.

P < 0.05 was taken to indicate statistical significance.