Table 2.

Mean Difference in PPC^®-PCMH™ Standards Scores between Baseline and 18-Month Follow-up within Each Study Condition (N = 28)*

Standards (points)	Mean of difference†	SE of difference†	Differential change (95 % CI)‡, §	P-value§
PPC 1: Access and Communication (9)
Intervention||	5.59	0.66	3.15 (0.99, 5.30)	0.006
Controls||	2.44	0.96
PPC 2: Patient Tracking and Registry Functions (21)
Intervention||	14.51	1.68	7.82 (2.32, 13.32)	0.007
Controls||	6.69	2.44
PPC 3: Care Management (20)
Intervention||	14.08	1.54	8.22 (3.18, 13.26)	0.002
Controls||	5.86	2.24
PPC 4: Patient Self-Management Support (6) ||
Intervention||	4.21	0.48	2.99 (1.42, 4.56)	<0.001
Controls	1.22	0.70
PPC 5: Electronic Prescribing (8)
Intervention||	3.83	0.64	2.52 (0.46, 4.59)	0.02
Controls	1.31	0.92
PPC 6: Test Tracking (13)
Intervention||	7.47	1.21	4.20 (0.14, 8.25)	0.04
Controls	3.28	1.76
PPC 7: Referral Tracking (4)
Intervention||	2.10	0.39	1.44 (0.13, 2.74)	0.03
Controls	0.67	0.56
PPC 8: Performance Reporting and Improvement (15)
Intervention||	8.96	1.12	6.24 (2.48, 10.00)	0.002
Controls	2.72	1.63
PPC 9: Advanced Electronic Communications (4)
Intervention	0.08	0.06	−.03 (−0.24, 0.17)	0.75
Controls	0.11	0.09

Multivariate test of study condition X time F[9, 18] = 2.79 p = 0.03.

* Intervention practices (n = 19), Control practices (n = 9).

^† Final PPC minus Baseline PPC; positive values reflect improvement in PPC scores.

^‡ Differential PPC^®-PCMH™ standards score change from Baseline to 18-month follow-up between intervention and control practices.

^§ Between-within effects using doubly Multivariate Analysis of Variance (MANOVA).

^|| Significant simple slope test within study condition (p < 0.05).