Table 1 Studies of effect of hospital and surgeon volume on outcomes

Hu et al.

< 60 RP/yr

> 60 RP/yr

In hospital complications adjusted OR (95% CI)

1.0

0.84 (0.59–1.19)

0.3

Length of stay parameter estimate (95% CI)

1.0

-0.42 (-0.89–0.03)

0.08

Anastomatic stricture rate adjusted OR (95% CI)

1.0

0.72 (0.49–1.04)

0.09

Begg et al

Low (1–33)

Medium (34–61)

High (62–107)

Very High (114–252)

% 30 day mortality

0.5

0.5

0.5

0.5

0.8

% 60 day mortality

0.6

0.6

0.6

0.5

0.7

% post-op complications

32

31

30

27

0.03

% late urinary complication

28

29

23

20

0.01

% long-term incontinence

19

19

18

18

0.2

Ellison et al

Low, < 25 RP/yr

Medium, 26–54 RP/yr

High, > 54 RP/yr

In hospital mortality adjusted OR (95% CI)

1.78 (1.2–2.7)

1.71 (1.2–2.6)

1.0

<0.001

Ave length of stay (days)

7.3

-

6.1

<0.0001

Yao et al

Low, < 38/yr

Medium-low, 39–74 RP/yr

Medium high, 75–140

High > 140 RP/yr

% 30 day mortality (95% CI)

0.63 (0.53–0.73)

0.59 (0.49–0.68)

0.56 (0.47–0.66)

0.39 (0.31–0.46)

0.0015

% 60 day mortality (95% CI)

5.0 (4.7–5.3)

4.5 (4.3–4.8)

4.3(4.0–4.5)

4.1 (3.8–4.3)

0.03

% overall complications (95% CI)

31.3 (30.8–31.9)

28.7 (28.2–29.3)

27.8 (27.2–28.3)

26.3 (25.8–26.9)

0.02

Mean day length of stay (95% CI)

8.51 (8.47–8.56)

8.18 (8.14–8.22)

7.70 (7.66–7.74)

7.81 (7.77–7.85)

0.0001

Surgeon Volume

Hu et al.

Low, < 40 RP/yr

High, > 40 RP/yr

In hospital complications adjusted OR (95% CI)

1.0

0.53 (0.32–0.89)

0.02

Length of stay parameter estimate (95% CI)

1.0

0.68 (1.26–0.06)

0.03

Anastomatic stricture rate adjusted OR (95% CI)

1.0

0.89 (0.55–1.44)

0.6

Begg et al

Low 1–10 RP/yr

Medium 11–19 RP/Yr

High 20–32 RP/yr

Very High, >33 RP/yr

% 30 day mortality

0.4

0.5

0.5

0.5

0.7

% 60 day mortality

0.5

0.5

0.6

0.6

0.6

% post-op complications

32

31

30

26

<0.001

% late urinary complication

28

26

27

20

0.001

% long-term incontinence

20

20

19

16

0.04