Predictors of having a blood alcohol test following admission to MTC1 for a major trauma injury event
| OR (95% CI) | P value* | aOR (95% CI) | P value* | ||
| Age (years) | 18 to 34 | 1.00 | <0.001 | 1.00 | 0.012 |
| 35 to 64 | 1.07 (0.81 to 1.42) | 1.24 (0.90 to 1.69) | |||
| ≥65 | 0.30 (0.24 to 0.39) | 0.83 (0.58 to 1.19) | |||
| Sex | Male | 1.00 | <0.001 | 1.00 | 0.525 |
| Female | 0.55 (0.45 to 0.67) | 0.95 (0.74 to 1.22) | |||
| IRSAD quintile | 5, least disadvantaged | 1.00 | <0.001 | 1.00 | <0.001 |
| 4 | 2.13 (1.61 to 2.82) | 1.43 (1.05 to 1.95) | |||
| 3 | 3.77 (2.62 to 5.42) | 2.04 (1.38 to 3.01) | |||
| 2 | 2.96 (2.10 to 4.19) | 1.50 (1.03 to 2.20) | |||
| 1, most disadvantaged | 4.02 (2.76 to 5.86) | 2.30 (1.52 to 3.48) | |||
| Preferred language | English | 1.00 | <0.001 | 1.00 | 0.102 |
| Language other than English | 0.35 (0.25 to 0.48) | 0.69 (0.45 to 1.05) | |||
| Pre-existing mental health condition | No | 1.00 | 0.138 | 1.00 | 0.019 |
| Yes | 1.21 (0.94 to 1.57) | 1.39 (1.02 to 1.89) | |||
| Pre-existing substance use condition | No | 1.00 | <0.001 | 1.00 | <0.001 |
| Yes | 2.59 (1.71 to 3.93) | 2.33 (1.47 to 3.70) | |||
| Smoking status | Non-smoker | 1.00 | <0.001 | 1.00 | 0.852 |
| Past smoker | 0.92 (0.69 to 1.24) | 0.98 (0.70 to 1.37) | |||
| Current smoker | 1.97 (1.51 to 2.57) | 1.09 (0.80 to 1.49) | |||
| High alcohol hours | No | 1.00 | 0.458 | 1.00 | 0.738 |
| Yes | 1.13 (0.82 to 1.57) | 0.96 (0.66 to 1.41) | |||
| Cause of injury | Motor vehicle/motorcycle collision (drivers) | 1.00 | <0.001 | 1.00 | <0.001 |
| Motor vehicle/motorcycle collision (passengers) | 1.04 (0.53 to 2.03) | 1.29 (0.67 to 2.50) | |||
| Other transport-related causes | 0.47 (0.32 to 0.71) | 0.62 (0.42 to 0.94) | |||
| Low falls | 0.11 (0.08 to 0.15) | 0.17 (0.12 to 0.25) | |||
| High falls | 0.86 (0.54 to 1.36) | 1.07 (0.68 to 1.70) | |||
| Flames/scalds/contact burns | 0.41 (0.22 to 0.76) | 0.33 (0.18 to 0.61) | |||
| Animal-related | 0.74 (0.28 to 1.92) | 0.67 (0.27 to 1.66) | |||
| Struck by or collided with an object or person | 0.40 (0.24 to 0.66) | 0.33 (0.18 to 0.60) | |||
| Cutting/piercing object | 0.61 (0.33 to 1.14) | 0.47 (0.22 to 1.01) | |||
| Other/unspecified | 0.42 (0.22 to 0.79) | 0.38 (0.20 to 0.73) | |||
| Injury intent | Unintentional | 1.00 | 0.009 | 1.00 | 0.781 |
| Intentional self-harm | 2.12 (1.22 to 3.69) | 1.20 (0.65 to 2.21) | |||
| Interpersonal violence | 1.23 (0.82 to 1.85) | 1.32 (0.70 to 2.47) | |||
| Could not be determined | 1.78 (0.86 to 3.69) | 0.89 (0.43 to 1.85) | |||
| Other/unspecified | – | – | |||
| Injury Severity (ISS) | Minor/moderate (ISS<16) | 1.00 | <0.001 | 1.00 | 0.212 |
| Severe (ISS 16–24) | 1.25 (1.00 to 1.55) | 1.18 (0.91 to 1.53) | |||
| Very severe (ISS>24) | 1.57 (1.24 to 2.00) | 1.25 (0.92 to 1.71) | |||
| GCS | 13–15 | 1.00 | 0.115 | 1.00 | 0.062 |
| 9–12 | 1.56 (1.00 to 2.43) | 1.57 (0.95 to 2.58) | |||
| 3–8 | 1.01 (0.76 to 1.35) | 0.72 (0.50 to 1.03) |
Values in bold font indicate statistically significant results.
*P values were derived using likelihood ratio tests.
aOR, adjusted OR; GCS, Glasgow Coma Scale; IRSAD, Index of Relative Socioeconomic Advantage and Disadvantage; ISS, Injury Severity Score.