Table 4 Changes in composite percentage of conditions coded

	NYFHT	Non-NYFHT	Difference	Adjusted difference^*
Changes for all ICD9 codes included in CPCSSN case definitions
31 March 2013, % coded	63.9	58.2	5.8
30 September 2013, % coded	72.9	59.2	13.8
Difference (95% CI)	9.0 (8.0–9.9)	1.0 (0.5–1.4)	8.0 (7.5–8.5)^†	7.7 (7.1–8.2)^†
Changes for most common ICD9 codes in CPCSSN definitions
31 March 2013, % coded	56.0	52.8	3.2
30 September 2013, % coded	67.9	53.2	14.7
Difference (95% CI)	12.0 (10.8–13.1)	0.4 (0.1–1.0)	11.5 (10.9–12.2)^†	8.9 (8.3–9.5)^†

↵* Adjusted for patient and provider age and gender, patient comorbidity, number of encounters and average number of patients per provider
↵† p < 0.01