Table 3 Factors associated with complete vital sign registration during EMS care time in the post-intervention period

Age group

0–2 months

0.3 [0.2;0.4]

 − 0.35 [− 0.40; − 0.30]

0.1 [0.0;0.1]

 − 0.32 [− 0.34; − 0.29]

3–11 months

0.6 [0.5;0.8]

 − 0.18 [− 0.23; − 0.12]

0.2 [0.2;0.3]

 − 0.26 [− 0.29; − 0.24]

1–2 years

0.6 [0.6;0.7]

 − 0.18 [− 0.22; − 0.14]

0.3 [0.3;0.4]

 − 0.23 [− 0.25; − 0.21]

3–7 years

0.9 [0.8;1.0]

 − 0.04 [− 0.09; 0.00]

0.6 [0.5;0.6]

 − 0.15 [− 0.18; − 0.13]

8–17 years (= ref)

1

–

1

–

Missing data, n (%)

0 (0.0%)

0 (0.0%)

Sex

Female

1.0 [1.0;1.1]

0.01 [− 0.02; 0.04]

1.1 [1.0;1.1]

0.01 [− 0.01; 0.03]

Male (= ref)

1

–

1

–

Missing data, n (%)

35 (0.9%)

65 (0.8%)

EMS care time^a

0–15 min

0.6 [0.4;0.8]

 − 0.21 [− 0.29; − 0.13]

0.5 [0.4;0.7]

 − 0.13 [− 0.18; − 0.08]

 > 15 min (= ref)

1

–

1

–

Missing data, n (%)

370 (11.9%)

751 (11.1%)

Treat-and-release situations

Yes

0.5 [0.4;0.5]

 − 0.24 [− 0.28; − 0.20]

0.6 [0.5;0.7]

 − 0.11 [− 0.13; − 0.08]

No (= ref)

1

–

1

Missing data, n (%)

0 (0.0%)

0 (0.0%)

COVID-19

Months with school lockdown in place > 50% of the time^b

1.0 [0.9;1.1]

 − 0.01 [− 0.06;0.03]

0.8 [0.7;0.9]

 − 0.04 [− 0.07; − 0.02]

Months without lockdown (= ref)

1

–

1

–

Missing data, n (%)

0 (0.0%)

0 (0.0%)

Implementation of ZOLL® monitors during the post-intervention period^c

2 months following implementation date

1.0 [0.8;1.2]

0.01 [− 0.06;0.08]

NA

NA

2 months before implementation date (= ref)

1

–

Missing data, n (%)

0 (0.0%)

Glasgow Coma Score (first observation)

Green = normal LOC

1.0 [0.9;1.2]

0.02 [− 0.04; 0.08]

0.7 [0.7;0.8]

 − 0.10 [− 0.14; − 0.05]

Yellow/orange/red = altered LOC (= ref)

1

–

1

–

Missing data, n (%)

571 (15.4%)

1513 (19.3%)

Triage score (first)

Green = ‘Not urgent’

0.8 [0.7;0.9]

 − 0.11 [− 0.14; − 0.07]

0.8 [0.7;0.9]

 − 0.07 [− 0.09; − 0.05]

Yellow/orange/red = ‘Less urgent’/’Urgent’/’Life-threatening’ (= ref)

1

–

1

–

Missing data, n (%)

925 (24.9%)

1758 (22.4%)

Prehospital physician at the scene

Yes, HEMS or MECU physician

0.8 [0.7;0.9]

 − 0.08 [− 0.11; − 0.04]

0.7 [0.7;0.8]

 − 0.08 [− 0.10; − 0.06]

No (= ref)

1

–

1

–

Missing data, n (%)

0 (0.0%)

0 (0.0%)

Accidents^d

Trauma

1.2 [1.1;1.3]

0.06 [0.02;0.10]

1.1 [1.0;1.3]

0.03 [0.01;0.06]

Minor injuries

1.4 [1.2;1.6]

0.15 [0.07;0.23]

1.6 [1.4;1.9]

0.14 [0.08;0.20]

Not accident (= ref)

1

–

1

–

Missing data, n (%)

137 (3.7%)

136 (1.7%)

Critical intervention(s)^e

 ≥ 1 intervention(s) performed

1.6 [1.4;1.7]

0.22 [0.17;0.27]

2.2 [2.0;2.4]

0.25 [0.22;0.28]

None (= ref)

1

–

1

–

Missing data, n (%)

0 (0.0%)

0 (0.0%)