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Table 1 Baseline demographic and pre-existing health status factors for burn and uninjured cohorts

From: Long-term mental health outcomes after unintentional burns sustained during childhood: a retrospective cohort study

Characteristics Uninjured N (%) Burn injury N (%) P value
Total 46,548 11,967  
Demographic
 Gender
  Male 29,238 (62.8) 7583 (63.4) 0.090
 Age
  0–4 27,061 (58.1) 6794 (56.8) 0.113
  5–9 6966 (15.0) 1794 (15.0)  
  10–14 6792 (14.6) 1826 (15.3)  
  15–17 5729 (12.3) 1494 (12.5)  
 Aboriginality
  Yes 2136 (4.6) 2196 (18.4) < 0.001
 Social disadvantage quintilesa
  Quintile 1 (most disadvantaged) 5826 (12.5) 2622 (21.9) < 0.001
  Quintile 2 11,740 (25.2) 3903 (32.6)  
  Quintile 3 8394 (18.0) 2393 (20.0)  
  Quintile 4 7860 (16.9) 1461 (12.2)  
  Quintile 5 (least disadvantaged) 12,484 (26.8) 1410 (11.8)  
 Remotenessb
  Major city 31,448 (67.6) 6184 (51.7) < 0.001
  Inner regional 4772 (10.3) 1262 (10.5)  
  Outer regional 5259 (11.3) 1932 (16.1)  
  Remote 2933 (6.3) 1379 (11.7)  
  Very remote 1784 (3.8) 1076 (9.0)  
Health status
 Any comorbidity (CCI ≥ 1)c 526 (1.1) 263 (2.2) < 0.001
 Prior admission for mental health conditiond 29 (0.1) 35 (0.3) < 0.001
 Prior admission for self-harm 14 (0.0) 24 (0.2) < 0.001
 Prior admission for drugs/alcohol 10 (0.0) 12 (0.1) < 0.001
 Congenital abnormality 1114 (2.4) 375 (3.1) < 0.001
  1. aSocio-Economic Index for Areas (SEIFA) socio-economic disadvantage quintiles; missing values 1.0% burn, 0.5% no injury
  2. bAccessibility Remoteness Index of Australia, revised version (ARIA+) remoteness classification; missing values 0.6% burn, 0.8% no injury
  3. cComorbidity based on derived Charlson Comorbidity Index (CCI) using 5-year look-back period
  4. dPrincipal diagnosis record of hospitalisation for mental health condition using 5-year look-back period