Table 3 Univariate and multivariate odds ratios for selected categorical predictor variables for the full model

Cardiac rhythm: VF, VT, asystole, or PEA

29.33 (27.04 to 31.82)

3.90 (3.38 to 4.50)

Mission located in medical facility or nursing home, yes

1.68 (1.52 to 1.85)

1.06 (0.92 to 1.23)

HEMS vehicle, ground unit^a

0.92 (0.87 to 0.96)

0.97 (0.88 to 1.06)

Sex, male

1.19 (1.12 to 1.25)

0.96 (0.88 to 1.04)

Patient category

Trauma

1.83 (1.41 to 2.37)

1.23 (0.88 to 1.71)

Cardiac arrest

46.82 (36.27 to 60.44)

1.60 (1.14 to 2.24)

Neurological^b

2.32 (1.78 to 3.03)

0.57 (0.41 to 0.79)

Psychiatric or intoxication

0.35 (0.25 to 0.49)

0.10 (0.07 to 0.15)

Other

2.27 (1.73 to 2.98)

0.79 (0.56 to 1.12)

Stroke

8.97 (6.89 to 11.69)

1.90 (1.35 to 2.66)

Respiratory failure

3.29 (2.49 to 4.35)

1.08 (0.76 to 1.54)

Chest pain

1.25 (0.90 to 1.75)

0.97 (0.65 to 1.45)

Infection or Gynaecology and obstetrics

1.00 (reference)

1.00 (reference)