Table 4 Number of hospitals and cases for total knee replacement interventions in 2006, 2008, and 2010 and number of cases per quintile
2006 | 2008 | 2010 | p | |
|---|---|---|---|---|
Hospitals with no. of cases ≥ 1 | 855 | 905 | 949 | |
Change to 2006 | - | +5,8 % | +11,0 | |
Annual no. of cases | 114852 | 139287 | 143593 | |
Change to 2006 | - | +21,3 % | +25 % | |
Min. – max. | 1–979 | 1–1329 | 1–1367 | |
Median | 93,00 | 109,00 | 107,00 | |
Mean (SD) | 134,33 (126,7) | 153,91 (144,1) | 151,31 (140,4) | |
Hospitals complying MVS*: 50 per year | 745 (87,1 %) | 834 (92,2 %) | 870 (91,7 %) | |
No. of cases in hospitals complying MVS | 112305 (97,8 %) | 137586 (98,8 %) | 141597 (98,6 %) | |
Hospitals not complying MVS | 110 (12,9 %) | 71 (7,8 %) | 79 (8,3 %) | |
No. of cases in hospitals not complying MVS | 2547 (2,2 %) | 1701 (1,2 %) | 1996 (1,4 %) | |
Quintile 1 hospitals | 171 | 181 | 190 | |
No. of cases | 56617 | 67795 | 69609 | 0,001** |
Percentage of annual cases | 49,3 % | 48,7 % | 48,5 % | |
Min. – max. | 191–979 | 215–1329 | 219–1367 | |
Median | 276,00 | 318,00 | 309,50 | |
Mean (SD) | 331,09 (153,4) | 374,56 (181,9) | 366,36 (177,0) | |
Quintile 2 hospitals | 171 | 181 | 190 | |
No. of cases | 25650 | 30686 | 31322 | <0,001** |
Percentage of annual cases | 22,3 % | 22,0 % | 21,8 % | |
Min. – max. | 117–190 | 133–215 | 130–218 | |
Median | 147,00 | 168,00 | 163,50 | |
Mean (SD) | 150,00 (21,3) | 169,54 (24,3) | 164,85 (23,7) | |
Quintile 3 hospitals | 171 | 181 | 189 | |
No. of cases | 16051 | 19870 | 20635 | <0,001** |
Percentage of annual cases | 14,0 % | 14,3 % | 14,4 % | |
Min. – max. | 75–116 | 89–153 | 91–130 | |
Median | 93,00 | 109,00 | 107,00 | |
Mean (SD) | 93,87 (11,9) | 109,78 11,5) | 109,18 (11,7) | |
Quintile 4 hospitals | 171 | 181 | 190 | |
No. of cases | 10857 | 13302 | 14042 | <0,001** |
Percentage of annual cases | 9,5 % | 9,6 % | 9,8 % | |
Min. – max. | 53–75 | 60–89 | 59–91 | |
Median | 63,00 | 74,00 | 73,00 | |
Mean (SD) | 63,49 (6,7) | 73,49 (8,1) | 73,91 (9,2) | |
Quintile 5 hospitals | 171 | 181 | 190 | |
No. of cases | 5677 | 7634 | 7985 | <0,001** |
Percentage of annual cases | 4,9 % | 5,5 % | 5,6 % | 0,999# |
Min. – max. | 1–53 | 1–60 | 1–59 | |
Median | 40,00 | 51,00 | 51,00 | |
Mean (SD) | 33,20 (18,1) | 42,18 (18,0) | 42,03 (17,6) |