Table 3.

Risk-adjusted patient outcomes before vs. after enrolling in the American College of Surgeons National Surgical Quality Improvement Program (ACS-NSQIP) as compared to Non-ACS-NSQIP matched control hospitals. P-value for trends over time are displayed for ACS-NSQIP and control hospitals.

	ACS-NSQIP Hospitals							Non-ACS-NSQIP Control Hospitals
	Pre-enrollment			Post-enrollment				Pre-enrollment			Post-enrollment
Risk-adjusted outcomes	Year 3	Year 2	Year 1	Year 1	Year 2	Year 3	p-value	Year 3	Year 2	Year 1	Year 1	Year 2	Year 3	p-value
Hospitals, N	204	263	263	263	263	261		413	526	526	525	519	515
Patients, N	60,640	79,651	77,033	73,566	70,816	68,473		113,107	148,198	143,358	137,616	130,082	123,957
Mortality, N	2739	3637	3391	3225	3057	3014		5315	6829	6359	6392	6059	5697
% (95% CI)*	4.6 (4.6–4.7)	4.6 (4.6–4.7)	4.4 (4.4–4.5)	4.3 (4.2–4.3)	4.1 (4.0–4.1)	4.2 (4.2–4.3)	<.0001	4.9 (4.8–4.9)	4.8 (4.8–4.8)	4.6 (4.5–4.6)	4.6 (4.6–4.7)	4.5 (4.4–4.5)	4.6 (4.5–4.6)	<.0001
Serious complications, N	6555	79651	77033	73566	70816	68473		11321	14880	14859	14460	14311	13735
% (95% CI)*	11.0 (11.0–11.1)	11.3 (11.2–11.4)	11.5 (11.4–11.6)	11.3 (11.2–11.4)	11.0 (10.9–11.1)	11.2 (11.1–11.3)	0.0102	10.4 (10.4–10.5)	10.4 (10.4–10.5)	10.6 (10.6–10.7)	10.4 (10.4–10.5)	10.6 (10.5–10.7)	10.9 (10.8–11.0)	<.0001
Reoperations, N	252	352	366	411	399	382		432	595	610	588	622	648
% (95% CI)*	0.4 (0.4–0.4)	0.4 (0.44–0.44)	0.5 (0.46–0.47)	0.5 (0.52–0.53)	0.5 (0.5–0.5)	0.5 (0.5–0.5)	0.0156	0.4 (0.4–0.4)	0.4 (0.4–0.4)	0.5 (0.4–0.5)	0.4 (0.4–0.4)	0.5 (0.5–0.5)	0.5 (0.5–0.5)	0.0176
Readmissions, N	7617	10250	10228	10188	9879	9720		13025	17374	17202	16770	16478	15903
% (95% CI)*	12.5 (12.5–12.6)	12.7 (12.7–12.8)	13.1 (13.1–13.2)	13.6 (13.6–13.6)	13.6 (13.6–13.7)	13.9 (13.9–14.0)	<.0001	11.7 (11.6–11.7)	11.9 (11.9–11.9)	12.1 (12.1–12.2)	12.2 (12.2–12.2)	12.7 (12.6–12.7)	12.9 (12.9–13.0)	<.0001

^*All models are adjusted for patient characteristics, comorbidities and procedure type.