Table 4.

Unadjusted and Propensity Score Weighted 30, 60, 90 day cumulative mortality Percent, 95% Confidence Intervals, by Hospital and Surgeon Average Annual Volume, 2010–2013 Diagnosis Years

	30 Day Mortality, 95% CI	60 Day Mortality 95% CI	90 Day Mortality 95% CI
Hospital Volume	Unadjusted	Unadjusted	Unadjusted
< 5 (n=4,630)	3.3 (2.7–3.8)	5.7 (5.1–6.4)	8.5 (7.7–9.3)
5–9 (n=3,762)	2.9 (2.4–3.4)	5.7 (4.9–6.4)	8.4 (7.4–9.3)
10–19 (n=3,064)	2.4 (1.8–2.9)	5.0 (4.2–5.8)	7.2 (6.3–8.1)
20–29 (n=1,859)	2.2 (1.5–2.9)	4.1 (3.2–5.0)	6.4 (5.2–7.5)
>=30 (n=5,887)	1.9 (1.5–2.2)	3.8 (3.3–4.3)	5.6 (5.0–6.2)
Hospital Volume	Weighted	Weighted	Weighted
< 5 (n=4,630)	2.8 (2.2–3.5)	5.1 (4.3–5.9)	7.8 (6.7–8.9)
5–9 (n=3,762)	2.8 (2.1–3.6)	5.5 (4.4–6.6)	8.0 (6.7–9.2)
10–19 (n=3,064)	2.5 (1.8–3.3)	5.3 (4.2–6.4)	7.6 (6.2–8.9)
20–29 (n=1,859)	2.4 (1.5–3.2)	4.1 (3.0–5.2)	7.0 (5.5–8.5)
>=30 (n=5,887)	1.9 (1.4–2.4)	3.6 (2.9–4.3)	5.5 (4.6–6.3)
Surgeon Volume	Unadjusted	Unadjusted	Unadjusted
<5 (n=10,191)	2.9 (2.6–3.2)	5.5 (5.1–6.0)	8.1 (7.6–8.6)
5–9 (n=2,992)	2.2 (1.6–2.8)	4.6 (3.8–5.4)	6.9 (5.9–7.8)
10–19 (n=3,456)	2.1 (1.6–2.6)	4.1 (3.3 −4.8)	6.3 (5.4–7.2)
20–29 (n=1,463)	2.2 (1.4–2.9)	4.0 (2.9–5.1)	5.7 (4.4–7.0)
>=30 (n=1,100)	1.8 (1.0–2.6)	2.7 (1.7–3.7)	4.0 (2.8–5.2)
Surgeon Volume	Weighted	Weighted	Weighted
<5 (n=10,191)	2.5 (2.2–2.9)	5.0 (4.5–5.5)	7.3 (6.7–8.0)
5–9 (n=3,762)	2.4 (1.5–3.3)	4.9 (3.8–6.0)	7.0 (5.7–8.3)
10–19 (n=3,064)	2.1 (1.5–2.8)	4.1 (3.2–5.1)	6.8 (5.6–8.1)
20–29 (n=1,859)	2.3 (1.1–3.6)	4.2 (2.5–5.8)	5.9 (4.1–7.8)
>=30 (n=5,887)	2.1 (0.6–3.6)	2.9 (1.2–4.5)	4.9 (2.6–7.3)
Total
All Patients	2.5 (2.3–2.7)	4.8 (4.5–5.1)	7.2 (6.8–7.6)