Table 5 The regression coefficient of multivariable linear regression with the outcome on-scene time (in minutes) stratified by age
Outcome: On-scene time (min) | All patients | Children (< 16 years) | Adults (16 ≥ years) | ||||||
|---|---|---|---|---|---|---|---|---|---|
Characteristic | Beta | 95% CI | p | Beta | 95% CI | p | Beta | 95% CI | p |
Helicopter hoist operation (HHO) | |||||||||
No | – | – | – | – | – | – | |||
Yes | 15.1 | 14.7, 15.5 | < 0.001 | 13.0 | 11.7, 14.3 | < 0.001 | 15.1 | 14.6, 15.5 | < 0.001 |
Critical interventions (per measure) | 2.4 | 2.0, 2.9 | < 0.001 | 2.7 | 1.5, 3.9 | < 0.001 | 2.4 | 1.9, 2.9 | < 0.001 |
Airway management (per measure) | 2.4 | 2.3, 2.6 | < 0.001 | 2.8 | 2.4, 3.2 | < 0.001 | 2.4 | 2.2, 2.5 | < 0.001 |
Resuscitation (per measure) | 2.1 | 1.8, 2.5 | < 0.001 | 1.6 | 0.03, 3.2 | 0.046 | 2.2 | 1.8, 2.5 | < 0.001 |
Basic interventions and monitoring (per measure) | 1.9 | 1.7, 2.0 | < 0.001 | 1.5 | 1.2, 1.8 | < 0.001 | 2.0 | 1.8, 2.2 | < 0.001 |
Immobilisation and analgesia (per measure) | 1.5 | 1.4, 1.7 | < 0.001 | 1.1 | 0.72, 1.4 | < 0.001 | 1.7 | 1.5, 1.8 | < 0.001 |
Location | |||||||||
Urban | – | – | – | – | – | – | |||
Remote | 1.2 | 0.93, 1.5 | < 0.001 | − 0.35 | − 0.90, 0.20 | 0.2 | 1.6 | 1.3, 1.9 | < 0.001 |
Time of day | |||||||||
Daytime (07:00–19:00) | – | – | – | – | – | – | |||
Night-time (otherwise) | 1.0 | 0.65, 1.3 | < 0.001 | 1.6 | 0.84, 2.4 | < 0.001 | 0.86 | 0.49, 1.2 | < 0.001 |
Other measures* (per measure) | 0.82 | 0.75, 0.90 | < 0.001 | 0.71 | 0.54, 0.87 | < 0.001 | 0.85 | 0.77, 0.93 | < 0.001 |
Non-trauma (per diagnosis) | 0.67 | 0.49, 0.84 | < 0.001 | 1.2 | 0.71, 1.8 | < 0.001 | 0.68 | 0.49, 0.86 | < 0.001 |
Trauma (per diagnosis) | 0.41 | 0.28, 0.55 | < 0.001 | − 0.13 | − 0.45, 0.20 | 0.4 | 0.47 | 0.32, 0.62 | < 0.001 |
National Advisory Committee for Aeronautics (NACA) score | |||||||||
NACA I–III | – | – | – | – | – | – | |||
NACA IV–VI | 0.36 | 0.05, 0.67 | 0.021 | 0.43 | − 0.13, 1.0 | 0.13 | 0.28 | − 0.07, 0.62 | 0.12 |
Sex | |||||||||
Female | – | – | – | – | – | – | |||
Male | − 0.19 | − 0.42, 0.05 | 0.12 | − 0.39 | − 0.85, 0.07 | 0.094 | − 0.14 | − 0.41, 0.12 | 0.3 |
Age category | |||||||||
Children | – | – | – | – | – | – | |||
Adults | − 0.83 | − 1.2, − 0.49 | < 0.001 | ||||||
Model performance | |||||||||
Number of observations (N) | 45,060 | 5,981 | 39,079 | ||||||
Adjusted R-squared | 0.23 | 0.26 | 0.23 | ||||||