Table 3.

Number of hospitals and cases for complex esophageal interventions in 2006, 2008, and 2010 and number of cases per quintile

	2006	2008	2010	p
Hospitals with no. of cases ≥ 1	271	275	283
Change to 2006	-	+1,5 %	+4,4 %
Annual no. of cases	3315	3422	3576
Change to 2006	-	+3,2 %	+7,9 %
Min. – max.	1–150	1–124	1–112
Median	10,00	10,00	10,00
Mean (SD)	12,23 (13,8)	12,44 (14,1)	12,64 (14,2)
Hospitals complying MVS*: 10 per year	154 (56,8 %)	148 (53,8 %)	160 (56,5 %)
No. of cases in hospitals complying MVS	2809 (84,7 %)	2875 (84,0 %)	3066 (85,7 %)
Hospitals not complying MVS	117 (43,2 %)	127 (46,2 %)	123 (43,5 %)
No. of cases in hospitals not complying MVS	506 (15,3 %)	547 (16,0 %)	510 (14,3 %)
Quintile 1 hospitals	54	55	57
No. of cases	1636	1800	1857	0,302**
Percentage of annual cases	49,4 %	52,6 %	51,9 %
Min. – max.	16–150	17–124	17–112
Median	22,50	24,00	23,00
Mean (SD)	30,30 (22,0)	32,73 (20,3)	32,58 (20,7)
Quintile 2 hospitals	54	55	56
No. of cases	696	687	729	0,165**
Percentage of annual cases	21,0 %	20,1 %	20,4 %
Min. – max.	11–16	11–16	11–17
Median	12,50	12,00	12,00
Mean (SD)	12,89 (1,5)	12,49 (1,6)	13,02 (1,8)
Quintile 3 hospitals	55	55	57
No. of cases	557	537	569	0,040**
Percentage of annual cases	16,8 %	15,7 %	15,9 %
Min. – max.	8–11	8–11	8–11
Median	10,00	10,00	10,00
Mean (SD)	10,13 (0,7)	9,76 (0,8)	9,98 (0,6)
Quintile 4 hospitals	54	55	56
No. of cases	321	297	325	0,092**
Percentage of annual cases	9,7 %	8,7 %	9,1 %
Min. – max.	4–8	4–8	3–8
Median	6,00	5,00	6,00
Mean (SD)	5,94 (1,3)	5,40 (1,3)	5,80 (1,4)
Quintile 5 hospitals	54	55	57
No. of cases	105	101	96	0,405**
Percentage of annual cases	3,2 %	3,0 %	2,7 %	0,999#
Min. – max.	1–4	1–4	1–3
Median	2,00	2,00	2,00
Mean (SD)	1,94 (0,9)	1,84 (1,0)	1,68 (0,8)

*minimum volume standards; **Kruskal-Wallis-test; # chi-square-test