Table 2. Baseline demographic and pre-existing health status factors for those aged 15 to 45 years at first burn injury hospitalisation and frequency matched non-injury cohort, Western Australia, 1980–2012.
| Characteristics | No Injury N (%) | Burn injury N (%) | p-value |
|---|---|---|---|
| Total | 56,822 | 14,555 | |
| Demographic | |||
| Aboriginal | |||
| Yes | 767 (1.3) | 1,764 (12.1) | <0.001 |
| Social disadvantage quintiles* | |||
| Quintile 1. (Most disadvantaged) | 5,977 (10.5) | 2,918 (20.5) | <0.001 |
| Quintile 2. | 12,729 (22.5) | 4,683 (32.9) | |
| Quintile 3. | 10,473 (18.5) | 3,089 (21.7) | |
| Quintile 4. | 10,454 (18.4) | 1,793 (12.6) | |
| Quintile 5. (Least disadvantaged) | 17,030 (30.1) | 1,748 (12.3) | |
| Remoteness** | |||
| Major city | 42,989 (75.9) | 7,031 (49.2) | <0.001 |
| Inner regional | 4,700 (8.3) | 1,577 (11.0) | |
| Outer regional | 4,867 (8.6) | 2,407 (16.9) | |
| Remote | 2,491 (4.4) | 1,732 (12.1) | |
| Very remote | 1,614 (2.8) | 1,532(10.7) | |
| Health status | |||
| Any comorbidity (CCI>=1)† | 729 (1.3) | 803 (5.5) | <0.001 |
| Prior admission for disease of | 829 (1.5) | 564 (3.9) | <0.001 |
| circulatory system‡ | |||
*SEIFA socio-economic disadvantage quintiles; 2.2% missing values for burn and 0.3% for uninjured.
**ARIA+ remoteness classification; 1.9% missing values for burn and 0.3% for uninjured.
†Comorbidity based on derived Charlson Comorbidity Index (CCI) using 5-year look-back.
‡Principal diagnosis record of hospitalisation for circulatory disease (ICD9 390–459; ICD10 I00-I99, G45) using 5-year look-back period.