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Table 1 Baseline demographic and pre-existing health status factors for those with a first-burn injury hospitalisation, and age and gender frequency matched non-burn trauma cohort and non-injured cohort, Western Australia, 1980–2012

From: A retrospective cohort study to compare post-injury admissions for infectious diseases in burn patients, non-burn trauma patients and uninjured people

Characteristics No injury N (%) Non-burn trauma N (%) Burn injury N (%) p value
Total 123,399 28,647 30,997  
Demographic
 Aboriginality
  Yes 2993 (2.4) 2628 (9.2) 4481 (14.5) < 0.001
 Social disadvantage quintilesa
  Quintile 1 (most disadvantaged) 14,597 (12.0) 4854 (17.3) 6579 (21.6) < 0.001
  Quintile 2 28,339 (23.4) 9010 (32.1) 9878 (32.4)  
  Quintile 3 22,142 (18.2) 5785 (20.6) 6354 (20.8)  
  Quintile 4 21,671 (17.9) 4202 (15.0) 3833 (12.6)  
  Quintile 5 (least disadvantaged) 34,609 (28.5) 4226 (15.1) 3857 (12.6)  
 Remotenessb
  Major city 88,278 (72.8) 15,763 (56.3) 15,810 (51.7) < 0.001
  Inner regional 11,725 (9.7) 2967 (10.67) 3360 (11.0)  
  Outer regional 11,653 (9.6) 4261 (15.2) 4958 (16.2)  
  Remote 5897 (4.9) 2848 (10.2) 3434 (11.2)  
  Very remote 3697 (3.0) 2178 (7.8) 3011 (9.8)  
Health status
 Any comorbidity (CCI ≥ 1)c 4691 (3.8) 1863 (6.5) 3131 (10.1) < 0.001
 Injury Category
  Low (ICISS ≥ 0.99) 123,399 (100) 19,646 (68.6) 17,917 (57.8) < 0.001
  Medium (0.941 ≤ ICISS < 0.99) 0 7313 (25.5) 10,326 (33.3)  
  High (ICISS < 0.941) 0 1688 (5.9) 2754 (8.9)  
  1. aSocio-Economic Indices for Areas (SEIFA) Socio-Economic Disadvantage Quintiles: missing values 1.6% burn, 2.0% injury, and 1.7% no injury
  2. bAccessibility Remoteness Index of Australia (ARIA+) remoteness classification: missing values 1.4% burn, 2.2% injury, 1.7% no injury
  3. cComorbidity based on derived Charlson Comorbidity Index (CCI) using a 5-year look-back
  4. ICISS International Classification for Injury Severity Score