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Table 4 Results of the accessibility analysis for 2007

From: Volume-outcome relationship and minimum volume regulations in the German hospital sector – evidence from nationwide administrative hospital data for the years 2005–2007

  All patients Affected patients
Observed travel time Minimum travel time Observed travel time Minimum travel time
Status quo Immediate closure Successive closure Status quo Immediate closure Successive closure
Liver
 Average 69.0 45.0 49.3 48.4 43.7 36.2 70.0 67.8
 Standard deviation 67.9 28.1 30.4 30.2 42.7 25.6 34.4 39.6
 Minimum 2 2 2 2 4 4 13 13
 Maximum 497 166 167 167 276 108 167 167
 25% percentile 26 23 25 25 17 16 48 35
 50% percentile 49 41 45 43 32.5 30.5 63.5 56
 75% percentile 89 60 67 65 57 48 88 93
 95% percentile 193 98 106 106 106 85 126 128
 Min volume threshold 9 9 21 21     
 Number of hospitals 22 22 17 18     
 Number of patients 1041 1041 1041 1041 62 62 62 49
Kidney
 Average 52.4 38.2 38.9 38.9 36.8 32.6 50.7 50.7
 SD 41.6 23.5 23.8 23.8 18.8 15.5 15.5 15.5
 Minimum 2 2 2 2 5 5 23 23
 Maximum 451 130 130 130 83 61 82 82
 25% percentile 23 19 20 20 25 25 41 41
 50% percentile 43 33 34 34 38 34 53 53
 75% percentile 71 54 55 55 48 45 61 61
 95% percentile 125 84 84 84 61 55 72 72
 Min volume threshold 19 19 26 26     
 Number of hospitals 42 42 40 40     
 Number of patients 2835 2835 2835 2835 41 41 41 41
Oesophagus
 Average 35.7 19.6 26.2 23.5 24.6 16.0 29.5 26.1
 SD 44.9 13.9 17.6 16.1 36.4 11.9 18.0 16.6
 Minimum 0 0 0 0 0 0 2 0
 Maximum 495 85 107 104 395 64 100 85
 25% percentile 12 9 12 11 9 7 15 13
 50% percentile 22.5 16 22 20 16 13 25 22
 75% percentile 43 27 37 34 27 21 41 36
 95% percentile 102 47 60 56 69 39 63 59
 Min volume threshold 3 3 11 10     
 Number of hospitals 270 270 117 150     
 Number of patients 3080 3080 3080 3080 842 842 842 598
Pancreas
 Average 33.2 15.6 19.1 18.1 17.4 12.8 24.4 22.9
 SD 43.2 10.6 13.0 12.5 21.8 9.0 14.5 14.1
 Minimum 0 0 0 0 0 0 1 1
 Maximum 535 84 89 87 324 58 85 67
 25% percentile 11 7 9 9 7 6 12 12
 50% percentile 19 13 16 15 13 11 21 20
 75% percentile 38 21 27 25 21 17 34 31
 95% percentile 104 36 44 43 43 30 52 51
 Min volume threshold 3 3 10 10     
 Number of hospitals 502 502 303 338     
 Number of patients 8733 8733 8733 8733 1111 1111 1111 829
Stem cell
 Average 51.4 30.7 33.2 32.5 37.2 25.3 39.3 37.1
 SD 49.6 19.8 20.7 20.5 39.6 16.3 19.4 19.8
 Minimum 0 0 0 0 2 1 4 4
 Maximum 481 117 117 117 251 109 109 109
 25% percentile 20 15 16 16 16 14 23 21
 50% percentile 39 26 29 28 26 22 37 34
 75% percentile 65 42 46 45 44 32 52 50
 95% percentile 138 70 73 72 113 58 73 72
 Min volume threshold 4 4 25 25     
 Number of hospitals 90 90 65 68     
 Number of patients 5517 5517 5517 5517 317 317 317 264
Knee
 Average 26.7 12.9 13.6 13.5 22.3 11.8 16.8 16.5
 SD 32.1 7.8 8.2 8.1 30.2 7.3 9.2 8.9
 Minimum 0 0 0 0 0 0 0 0
 Maximum 553 92 92 92 465 46 62 53
 25% percentile 11 7 7 7 9 6 10 10
 50% percentile 19 11 12 12 15 10 16 15
 75% percentile 31 18 18 18 25 16 22 22
 95% percentile 68 27 29 29 60 26 34 34
 Min volume threshold 3 3 50 50     
 Number of hospitals 974 974 845 853     
 Number of patients 133,389 133,389 133,389 133,389 3290 3290 3290 2924
CABG
 Average 45.1 31.3 32.5 32.5 45.2 29.7 49.5 48.6
 SD 38.8 18.5 19.3 19.2 46.9 19.2 25.4 24.7
 Minimum 0 0 0 0 0 0 2 2
 Maximum 497 113 113 113 458 96 110 106
 25% percentile 19 17 17 17 16 15 29 27
 50% percentile 34 28 28 28 29 25 48 49
 75% percentile 59 43 45 45 62 41 65 65
 95% percentile 113 66 69 68 132 68 96 92
 Min volume threshold 3 3 200 200     
 Number of hospitals 83 83 71 72     
 Number of patients 37,965 37,965 37,965 37,965 1133 1133 1133 943