Table 4 Quality indicators of ED’s production; p value based on t tests comparing performance indicators between 2002 and 2005 and 2002 and 2006

Production in the ED

2002

2005

p value

2006

p value

 Av. monthly visits

3493

4366

<0.001

4917

<0.001

 Hospitalisation rate

24.7%

19.1%

<0.001

17.3%

<0.001

 Total time in the ED (average ± sd)

04:34:00 ± 06:04:20

05:48:34 ± 04:56:59

<0.001

05:50:25 ± 04:55:29

<0.001

 Readmission rate at 24 h

1.1%

1.0%

0.53

1.3%

<0.001

 Readmission rate at 48 h

2.1%

2.0%

0.28

2.4%

<0.001

 Readmission rate at 72 h

2.9%

2.7%

0.14

3.3%

<0.001

 ED mortality rate

0.4%

0.6%

<0.001

0.5%

0.07

 LWBS rate

0.9%

1.4%

<0.001

4.5%

<0.001