Table 3

Odds of chiropractic use in U.S. Population with chronic spine pain using MEPS

	OR	95% CI		OR	95% CI
Age			SF-12/36 PCS
18 to 30	1.00	Reference	Quartile 1	1.00	Reference
31 to 50	1.04	(0.83 to 1.29)	Quartile 2	1.39**	(1.10 to 1.76)
51 to 64	1.03	(0.83 to 1.29)	Quartile 3	2.15***	(1.61 to 2.89)
65 to 84	0.87	(0.68 to 1.11)	Quartile 4	2.88***	(2.10 to 3.94)
85 and above	0.41**	(0.22 to 0.75)	SF-12/36 MCS
Sex			Quartile 1	1.00	Reference
Male	1.00	Reference	Quartile 2	1.08	(0.87 to 1.35)
Female	1.22***	(1.09 to 1.36)	Quartile 3	1.36*	(1.07 to 1.74)
Race			Quartile 4	1.47**	(1.11 to 1.94)
Alaskan Native, or American Indian	0.57	(0.29 to 1.12)	QALYs
Asian	0.59**	(0.42 to 0.84)	Quartile 1	1.00	Reference
Multiple Race	1.02	(0.66 to 1.57)	Quartile 2	1.34*	(1.05 to 1.71)
Other Race	0.58	(0.19 to 1.76)	Quartile 3	1.40*	(1.03 to 1.90)
White	1.00	Reference	Quartile 4	1.32	(0.93 to 1.88)
Black/African American	0.27***	(0.21 to 0.34)
Ethnicity
Hispanic	0.37***	(0.30 to 0.46)
Not Hispanic	1.00	Reference

*P≤0.05, **P≤0.01, ***P≤0.001

*Data from MEPS using 12,679 observations representative of 15,604,791 U.S. adults

OR=odds ratio; CI=confidence interval