Table 1.

Mean Infrastructure Scores, Percent of “Must Pass” Elements Achieved, and the Proportion of Practices Qualifying for Medical Home Recognition, Stratified by Practice Size and Organizational Structure

	Estimate (95 Percent Confidence Interval)
		Practice Size					Organizational Structure
Measure of Practices’ Achievement	All Practices n = 138,795	Solo/Partner n = 108,963	Small Group n = 21,638	Medium Group n = 6,497	Large Group n = 1,697	p-Value†	Single-Specialty n = 21,016	Multi-Specialty n = 8,816	p-Value††
Mean infrastructure score*	33.1 (31.4–34.8)	31.0 (29.0–32.9)	38.4 (35.8–41.0)	45.5 (41.1–49.8)	59.2 (55.1–63.2)	<.001	39.7 (37.2–42.2)	44.4 (39.3–49.4)	<.001
Percent of “must pass” elements achieved	34.9 (33.1–36.7)	32.8 (30.8–34.9)	39.9 (37.3–42.5)	46.9 (42.7–51.1)	58.4 (54.5–62.3)	<.001	41.4 (38.9–43.8)	45.2 (40.5–49.8)	<.001
Percent of practices with a given level of recognition
Not recognized	46.3 (42.5–50.2)	50.2 (45.5–54.8)	35.9 (31.0–41.2)	26.3 (19.9–33.8)	12.2 (8.3–17.6)	<.001	34.5 (29.7–39.6)	27.7 (20.1–36.8)	<.001
Level 1	30.5 (26.8–34.2)	30.0 (25.5–35.0)	31.9 (27.3–36.9)	34.7 (28.5–41.5)	24.0 (18.1–31.2)		31.7 (27.5–36.2)	33.0 (25.0–42.1)
Level 2	14.5 (12.3–16.7)	12.6 (10.2–15.5)	21.4 (17.6–25.7)	19.3 (14.6–25.0)	28.3 (21.8–35.9)		21.0 (17.5–25.0)	22.0 (16.3–29.1)
Level 3	8.7 (6.8–10.6)	7.2 (5.3–9.8)	10.8 (7.9–14.5)	19.7 (14.4–26.4)	35.5 (27.7–44.2)		12.8 (9.8–16.6)	17.3 (11.8–24.7)

^*The denominator for a practice's infrastructure score was based on the NAMCS items (that mapped to specific NCQA elements) for which it reported data. The maximum denominator for the score was 59 points; however, the denominator value changed in the setting of missing data.

^†p-value is for the comparison between solo/partnership, small, medium, and large group practices.

^††p-value is for the comparison between solo/partnership, single-specialty, and multi-specialty group practices.

NCQA, National Committee on Quality Assurance.