Table 3.

Associations of baseline and follow-up overweight and obesity with LBP

BMI at baseline, kg/m2	BMI at follow-up, kg/m2	LBP, preceding 30 days (n=1363)			Radiating LBP, preceding 30 days (n=1363)
		n*	PR†	95% CI	n*	PR†	95% CI
<25	<25	104 (509)	1.00		48 (509)	1.00
<25	25–29.9	161 (560)	1.00	0.76 to 1.32	70 (560)	1.34	0.89 to 2.00
<25	≥30	33 (106)	1.18	0.74 to 1.88	17 (106)	1.91	1.03 to 3.53
≥25	<25	2 (8)	0.84	0.17 to 4.28	0 (8)	–	–
≥25	25–29.9	21 (62)	1.39	0.79 to 2.50	10 (62)	2.10	1.00 to 4.47
≥25	≥30	26 (118)	0.76	0.47 to 1.23	18 (118)	1.65	0.89 to 3.06

Significant associations have been marked with bold.

*Number with outcome (number of exposed).

†PRs and their 95% CIs are adjusted for age, smoking and education.

BMI, body mass index; LBP, low back pain; PR, prevalence ratio.