Table 3

Number of patients in the four different MABP groups in different time periods

Period

Group 1

Group 2

Group 3

Group 4

All groups

1987-1992

72 (6.5)

88 (8.0)

40 (3.6)

901 (81.9)

1101 (100.0)

1993-1997

272 (8.7)

279 (8.9)

299 (9.6)

2277 (72.8)

3173 (100.0)

1998-2003

490 (11.7)

459 (11.0)

638 (15.2)

2604 (61.1)

4191 (100.0)

1987-2003

834 (9.9)

826 (9.8)

977 (11.6)

5782 (68.7)

8419 (100.0)

Group 1 - Cholecystectomy during index stay. Group 2 - No cholecystectomy at index stay but within 30 days of index admission. Group 3 - Sphincterotomy but not cholecystectomy within 30 days of index admission. Group 4 - Neither cholecystectomy nor sphincterotomy within 30 days of index admission. Percent within brackets.

Sandzén et al. BMC Gastroenterology 2009 9:80   doi:10.1186/1471-230X-9-80