Table 3c.

Ambulatory Utilization for “Users” of back pain services (N = 8,244)

		OB only	OP only	ER only	Rx only	COMB
A1) Single BP Period - Uncensored One “active” round preceded and followed by “inactive” rounds Round-by-Round Patterns: OOOXO, OOXOO, OXOOO	n = 2,824	44.8 %	1.3 %	2.5 %	9%	42.3%
A2) Single BP Period – Censored One “active” round bounded on one side by sample frame and bounded on other side by “inactive” rounds Round-by-Round Patterns: OOOOX, XOOOO	n = 1,526	44.9 %	1.6 %	1.9 %	14%	37.6%
B1) Two contiguous BP Periods - Uncensored Two “active” rounds preceded and followed by “inactive” round Round-by-Round Patterns: OXXOO, OOXXO	n = 516	30.2 %	.6 %	.2 %	5.4%	63.6%
B2) Two contiguous BP Periods - Censored Two “active” rounds bounded on one side by sample frame and bounded on other side by “inactive” rounds Round-by-Round Patterns: XXOOO, OOOXX	n = 673	36.1 %	0 %	0 %	6.2%	57.7%
C) Three or more contiguous BP Periods Round-by-Round Patterns: OOXXX, OXXXO, XXXOO, OXXXX, XXXXO, XXXXX	n = 1,495	23.3 %	.1 %	0 %	4.2%	72.4%
D) Multiple, recurrent BP Periods Two or more “active” rounds interspersed with “inactive” rounds Round Patterns: OOXOX, OXOOX, OXOXO, OXOXX, OXXOX, XOOOX, XOOXO, XOOXX, XOXOO, XOXOX, XOXXO, XOXXX, XXOOX, XXOXO, XXOXX, XXXOX.	n = 1,210	29.2 %	0 %	.1 %	6.8%	64%

Note: Reading Row one as example, of the 2,824 individuals in category (A1), 44.8% were identified with back pain events in only the Office-Based (OB) setting, 1.3% were identified with back pain events in only OutPatient (OP), 2.5% were identified with back pain events in only ER, 9% were identified with only back pain Rx events, and 42.3% were identified with back pain events in more than one, i.e. some combination of OB, OP, ER, and/or Rx back pain events. This table represents adult back pain cases identified in MEPS Panels 5-through-10 Ambulatory Utilization Events files, Office-Based (OB), Outpatient (OP), ER, and Rx, by categories of approximated back pain episodes-of-care groups (N = 8,244).