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Table 3 Number of hospitals and cases for complex esophageal interventions in 2006, 2008, and 2010 and number of cases per quintile

From: Minimum volume standards in German hospitals: do they get along with procedure centralization? A retrospective longitudinal data analysis

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