Table 2.

Association of musculoskeletal pain except LBP with new-onset LBP

	Number of musculoskeletal pain sites except LBP
	total	0	1	≥ 2	P for trend
Participants	1782	1343	283	156
New-onset LBP, n (%)	251 (14.1)	155 (11.5)	53 (18.7)	43 (27.6)
Crude OR (95% CI)		1	1.77 (1.25–2.49)	2.92 (1.98–4.30)	<  0.001
Adjusted OR (95% CI)		1	1.73 (1.16–2.57)	3.20 (2.01–5.09)	<  0.001

Adjusted for sex, age, body mass index, living area, smoking habits, drinking habits, complications, working status, walking time, living status, subjective economic condition, Kessler Psychological Distress Scale, Athens Insomnia Scale, and Lubben Social Network Scale. LBP: low back pain, OR: Odds ratio, CI: Confidence interval