Measure	Survey year
Measure	2002 (N = 8201)	2007 (N = 5969)	2012 (N = 9913)
Saw OT/PT in past 12 months*
Yes, n	1174	864	1467
Weighted % (95% CI)	14.4 (13.5–15.3)	15.2 (14.2–16.2)	15.0 (14.1–15.8)
Saw/talked to chiropractor in past 12 months*
Yes, n	1307	958	1562
Weighted % (95% CI)	16.4 (15.6–17.3)	17.1 (15.9–18.2)	16.2 (15.4–17.0)
Saw chiropractor in past 12 months**
Yes, n	1139	907	1375
Weighted % (95% CI)	14.6 (13.7–15.4)	16.3 (15.1–17.5)	14.6 (13.8–15.5)
Chiropractic use for back pain or problem in past 12 months**
Yes, n	800	648	682
Weighted % (95% CI)	10.4 (9.6–11.2)	11.6 (10.7–12.6)	7.1 (6.5–7.7)
Ever saw chiropractor**
Yes, n	2507	2125	3358
Weighted % (95% CI)	32.1 (31.0–33.2)	38.1 (36.4–39.8)	35.8 (34.7–37.0)

^*Measures from yearly NHIS survey used in main analyses to estimate use of OT/PT and chiropractic care among adults with low back pain and back-related leg pain
^**Additional measures of chiropractic care use were available in 2002, 2007, and 2012 from the Adult Complementary and Alternative Medicine (ACAM) Survey. Similar measures of OT/PT use were not available for comparison

Table 3.