Table 1 : Patients and epidural characteristics per group for groups 1 to 4 (≤24, >24 to ≤48, >48 to ≤72 and >72 hours of epidural analgesia respectively). Data are numbers and percentages unless otherwise noted.


  Group 1 Group 2 Group 3 Group 4 Overall p*

Year 2009 18 41.9% 8 17.8% 39 29.8% 7 29.2% 72 29.6% N.S.
2010 14 32.6% 16 35.6% 46 35.1% 3 12.5% 79 32.5% N.S.
2011 7 16.3% 11 24.4% 37 28.2% 10 41.7% 65 26.7% N.S.
2012 4 9.3% 10 22.2% 9 6.9% 4 16.7% 27 11.1% 0.021

Age (mean±SD) -- 67±13 -- 65±12 -- 68±11 -- 62±17 -- 67±13 N.S.

Gender Male 20 46.5% 17 37.8% 68 51.9% 10 41.7% 115 47.3% N.S.
Female 23 53.5% 28 62.2% 63 48.1% 14 58.3% 128 52.7% N.S.

ASA ASA I/II 34 79.1% 29 64.4% 96 73.3% 18 75.0% 177 72.8% N.S.
ASA III/IV 7 16.3% 10 22.2% 16 12.2% 2 8.3% 35 14.4% N.S.
Not recorded 2 4.7% 6 13.3% 19 14.5% 4 16.7% 31 12.8% N.S.

Initial disposition Ward 36 83.3% 38 84.4% 114 87.0% 20 83.3% 208 85.6% N.S.
MCU/ICU 7 16.3% 7 15.6% 17 13.0% 4 16.7% 35 14.4% N.S.

Level of
Insertion.
High Thoracic
(Th2-Th7)
3 7.0% 2 4.4% 6 4.6% 4 16.7% 15 6.2% N.S.
Low Thoracic
(Th8-Th12)
25 58.1% 22 48.9% 76 58.0% 10 41.7% 133 54.7% N.S.
Lumbar (L1-L4) 7 16.3% 13 28.9% 32 24.4% 7 29.2% 59 24.3% N.S.
Not recorded 8 18.6% 8 17.8% 17 13.0% 3 12.5% 36 14.8% N.S.

Type of surgery (Low-)Anterior/Rectal/
Rectosigmoid Resection
15 34.9% 13 28.9% 48 36.6% 6 25.0% 82 33.7% N.S.
  Hemicolectomy 10 23.3% 12 26.7% 37 28.2% 3 12.5% 62 25.5% N.S.
  SigmoidResection 11 25.6% 7 15.6% 26 19.8% 6 25.0% 50 20.6% N.S.
  Stoma Construction/Reversal 2 4.7% 4 8.9% 7 5.3% 3 12.5% 16 6.6% N.S.
  (Subtotal) Colectomy/Proctocolectomy 1 2.3% 3 6.7% 8 6.1% 2 8.3% 14 5.8% N.S.
  IleocecalResection 3 7.0% 2 4.4% 3 2.3% 0 0.0% 8 3.3% N.S.
  (Exploratory) Laparotomy 1 2.3% 2 4.4% 1 0.8% 2 8.3% 6 2.5% N.S.
  Others 0 0.0% 2 4.4% 1 0.8% 2 8.3% 5 2.1% N.S.

*: after Bonferonni correction. †: 1 of these surgeries was done laparoscopic; ICU: Intensive care unit;
MCU: Medium care unit; Th: Thoracic; L: Lumbar

Koolwijk et al.Journal of Anesthesiology and Clinical Science  2013 2:27DOI : 10.7243/2049-9752-2-27