. Author manuscript; available in PMC: 2017 Oct 10.

Published in final edited form as: J Ambul Care Manage. 2017 Jul-Sep;40(3):228–237. doi: 10.1097/JAC.0000000000000162

Table 2.

Quality Analyses, Average Rate per Period and D-I-D Estimate

	Preperiod		Postperiod		D-I-D Estimate (SE)^a

	Pilot	Comparison	Pilot	Comparison
Cervical cancer screening^b	0.32	0.33	0.35	0.34	0.0032 (0.0469)
Breast cancer screening	0.82	0.80	0.80	0.78	0.001 (0.013)
Colon cancer screening^b	0.38	0.40	0.34	0.35	0.0069 (0.0147)
Dilated eye examinations for patients with diabetes	0.91	0.90	0.91	0.92	− 0.0192 (0.012)
HbA_1c testing for patients with diabetes	0.77	0.76	0.76	0.75	− 0.0054 (0.016)
Lipid control in patient with diabetes	0.61	0.57	0.59	0.54	− 0.0006 (0.0159)
Nephropathy screening/treatment for patients with diabetes	0.60	0.57	0.59	0.54	0.0046 (0.0177)

Abbreviation: D-I-D, difference-in-difference; HbA_1c, glycated hemoglobin A_1c; SE, standard errors.

No DID estimates reached statistical significance at the p < .05 level.

Modified look-back periods were used that were prescribed by HEDIS to shorter time frames available in the data.