Table 3 Combined model of attributes of patients who did not receive pre-hospital interventions with p ≤ 0.25 after performing backwise logistical regression, including demographic variables with p ≥ 0.25

Age in years

0.012

.004

.001

1.012 (1.005, 1.020)

Sex (male)

0.142

.167

.400

1.153 (.831, 1.600)

Low acuity primary

reference

Low acuity secondary

−.553

.378

.140

.575 (.274, 1.205)

Urgent

1.043

.265

<.001

2.839 (1.690, 4.770)

Acute

2.111

.276

<.001

8.259 (4.810, 14.179)

Chest pain, cardiac

2.059

.370

<.001

7.842 (3.796, 16.198)

Abdominal pain, back pain

.740

.333

.030

2.096 (1.090, 16.198)

Breathing problems

1.430

.345

<.001

4.178 (2.125, 8.214)

Accidents

−1.325

.628

.040

.266 (.078, .910)

Minutes used on transport

.020

.004

<.001

1.020 (1.013, 1.028)