EXHIBIT 2

Adult Ambulatory Visits To Providers Of, And National Expenditures On, Complementary And Alternative Medicine Services, 2002 And 2008

	2002				2008
	Chiropractic care	Acupuncture	Massage therapy	Other CAM services	Chiropractic care	Acupuncture	Massage therapy	Other CAM services
Adult users (millions)	11.5	0.9	3.2	1.1	11.9	1.1	3.4	1.2
Visits (millions)	98.6	6.4	17.1	3.6	96.1	5.4	17.0	3.7
Mean visits per usera	8.6	6.7	5.4	3.3	8.1	4.8b	5.0	3.2
Expenditures (billions)	6.2	0.4	1.0	0.4	6.9	0.4	1.0	0.3
Mean expenditures per usera	447	360	259	301	582b	325	305	214

SOURCE Authors’ analyses of data from the Medical Expenditure Panel Survey (Note 12 in text).

NOTES Other complementary and alternative medicine (CAM) includes homeopathy, naturopathy, and herbal medicine. Expenditures are 2008 dollars, adjusted for inflation.

^aLinear regression adjusted for age, sex, and health care insurance status (uninsured, private, or public health insurance) used in comparisons of means (expenditures were log transformed) across years 2002–08 to test for trend.

^bp ≤ 0.05 for coefficient of year included as categorical variable in models.