Skip to main content

Table 1 Baseline patient demographic and hospital characteristics according to presence or absence of post-operative sepsisa (n = 144,503)

From: The impact of post-operative sepsis on mortality after hospital discharge among elective surgical patients: a population-based cohort study

Characteristics Non-sepsis Sepsis IR of sepsis
Total 142,646 1857 12.9
Year of admission
 2007 23,564 (16.5%) 281 (15.1%) 11.8
 2008 23,993 (16.8%) 293 (15.8%) 12.1
 2009 23,305 (16.3%) 280 (15.1%) 11.9
 2010 24,447 (17.1%) 324 (17.5%) 13.1
 2011 24,195 (17.0%) 315 (17.0%) 12.9
 2012 23,142 (16.2%) 364 (19.6%) 15.5
Hospitalisation in preceding year
 2007 N/A N/A  
 2008 2275/23,993 (9.5%) 35/293 (12.0%)  
 2009 2734/23,305 (11.7%) 40/280 (14.3%)  
 2010 3344/24,447 (13.7%) 46/324 (14.2%)  
 2011 3771/24,195 (15.6%) 54/315 (17.1%)  
 2012 3889/23,142 (16.8%) 64/364 (17.6%)  
Age
 ≥18 years to <35 years 8838 (6.2%) 106 (5.7%) 11.9
 ≥35 years to <55 years 28,015 (19.6%) 348 (18.7%) 12.3
 ≥55 years to <75 years 64,382 (45.1%) 814 (43.8%) 12.5
 ≥75 years 41,411 (29.0%) 589 (31.7%)* 14
 Mean ± SD 63.8 ± 16.3 64.8 ± 16.3**  
Sex
 Male 67,011 (47.0%) 1147 (61.8%)** 16.8
 Female 75,635 (53.0%) 710 (38.2%)** 9.3
Country of birth
 Australia and New Zealand 98,787 (69.3%) 1249 (67.3%) 12.5
 United Kingdom, United States and Canada 10,205 (7.2%) 111 (6.0%)* 10.8
 Non-English-speaking Europe 15,949 (11.2%) 220 (11.8%) 13.6
 North Africa 5564 (3.9%) 78 (4.2%) 13.8
 Asia 6,922 (4.9%) 93 (5.0%) 13.3
 Others 4,222 (3.0%) 77 (4.1%)** 17.9
 Unknown 997 (0.7%) 29 (1.6%)** 28.3
Marital status
 Married 77,810 (54.6%) 1005 (54.1%) 12.8
 Single 62,745 (44.0%) 805 (43.3%) 12.7
 Unknown 1923 (1.3%) 47 (2.5%)** 23.9
Severity of illness/co-morbidity
 Normal 116,031 (81.3%) 969 (52.2%)** 8.3
 Moderate 16,509 (11.6%) 322 (17.3%)** 19.1
 Severe 5700 (4.0%) 213 (11.5%)** 36.0
 Very severe 4406 (3.1%) 353 (19.0%)** 74.2
SEIFA scores
 First quartile (most disadvantaged) 48,634 (34.1%) 590 (31.8%)* 12
 Second quartile 41,195 (28.9%) 568 (30.6%) 13.6
 Third quartile 31,862 (22.3%) 408 (22.0%) 12.6
 Fourth quartile (most advantaged) 19,888 (13.9%) 267 (14.4%) 13.2
 Unknown 1067 (0.7%) 24 (1.3%)** 22
Local health district of facilities
 Metropolitan 91,018 (63.8%) 1336 (71.9%)** 14.5
 Rural 44,902 (31.5%) 420 (22.6%)** 9.3
 Unknown 6726 (4.7%) 101 (5.4%) 14.8
Peer hospital group
 Principal referral 85,108 (59.7%) 1358 (73.1%)** 15.7
 Ungrouped acute 2418 (1.7%) 6 (0.3%)** 2.5
 Major metropolitan and non-metropolitan 44,850 (31.4%) 444 (23.9%)** 9.8
 District groups 1 and 2 10,270 (7.2%) 49 (2.6%)** 4.7
Major surgical procedure
 CABG 8994 (6.3%) 186 (10.0%)** 20.3
 Abdominal surgery 33,506 (23.5%) 649 (35.0%)** 19.0
 EVAR 1458 (1.0%) 20 (1.1%) 13.5
 Total hip replacement 13,632 (9.6%) 45 (2.4%)** 3.3
 Total knee replacement 22,598 (15.8%) 57 (3.1%)** 2.5
 Other 62,458 (43.8%) 900 (48.5%)** 14.2
Length of stay
 Mean ± SD 9.1 ± 9.6 33.4 ± 31.6  
 Median (IQR) 6 (5–10) 24 (14–42)  
  1. Abbreviations: IR Incidence rate of sepsis reported per 1000 admissions, SEIFA Socio-Economic Indexes for Areas, CABG Coronary artery bypass graft, EVAR Endovascular aneurysm repair
  2. aThe two cohorts were compared by t test for continuous values or chi-square test for dichotomous values
  3. *P ≤ 0.05 for difference between cohorts
  4. **P ≤ 0.01 for difference between cohorts