Table 3 Surgeon and hospital patient volumes for different time-periods
Period | 1988–1993 | 1993–1995 | 1995–1997 | Total | Cusick's test for trend a |
|---|---|---|---|---|---|
Surgeon volumeb | 67 (47–90) 1–90 | 58 (51–67) 1–90 | 58 (51–67) 1–90 | 65 (51–90) 1–90 | z=−14.72, P<0.01 |
Hospital volumeb | 83 (64–86) 1–86 | 68 (44–83) 1–86 | 64 (34–83) 1–86 | 68 (44–83) 1–86 | z=−18.66, P<0.01 |
