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Table 4 Cross-sectional and retrospective mean waiting times

From: A model to prioritize access to elective surgery on the basis of clinical urgency and waiting time

  Cross-sectional mean waiting time (days) Retrospective mean waiting time (days)
Index day A1 A2 B C D A1 A2 B C D
01/08/2005 9 46 58 115 461 8 66 72 115 189
01/09/2005 7 42 71 114 414 - 80 76 135 185
01/10/2005 - 37 49 114 444 7 63 88 149 172
01/11/2005 13 28 45 113 429 7 42 77 169 184
01/12/2005 - 27 52 144 457 7 38 67 188 -
01/01/2006 7 31 54 110 485 8 60 86 212 -
01/02/2006 - 17 51 128 520 6 33 81 220 -
01/03/2006 4 19 52 74 484 10 25 55 179 -
01/04/2006 10 15 51 38 312 12 25 52 169 -
01/05/2006 - 18 38 46 340 14 29 68 159 -
01/06/2006 - 18 42 57 368 15 28 62 143 -
01/07/2006 - 25 38 81 400 13 30 64 195 -
01/08/2006 8 26 42 89 419 12 33 61 175 -
01/09/2006 11 24 57 101 467 6 35 57 157 -
01/10/2006 - 22 27 102 462 11 29 73 132 227
01/11/2006 1 22 31 103 490 9 28 68 130 -
01/12/2006 5 28 44 100 400 4 25 65 130 -
01/01/2007 7 33 48 71 353 8 37 68 142 -
01/02/2007 - 35 47 79 381 6 32 71 176 -
01/03/2007 5 40 54 93 309 3 38 82 162 -
Mean ± SD 7.2 ± 3.3 27.6 ± 8.9 48.5 ± 9.9 93.6 ± 27.0 419.7 ± 61.1 8.7 ± 3.3 38.8 ± 15.7 69.6 ± 10 161.8 ± 28.3 191.4 ± 20.9
Median 7 26 48 100 424 8 33 68 160 185
95% CI           
From 5.17 23.5 42.9 80.9 391.2 7.1 31.4 65.0 149.0 165.5
To 9.33 31.8 52.2 106.3 448.3 10.3 46.1 74.3 175.1 217.3
  1. SD: Standard deviation. CI: Confidence interval. Mean waiting times were measured in days as cross sectional indexes, calculated among waiting patients at an index day (cross-sectional indexes), and in admitted patients (retrospective indexes).