Multivariate analysis | |||
---|---|---|---|
Predictor | OR | 95% CIs | p Value |
Patient characteristics | |||
Age | 1.00 | 0.97 to 1.03 | 0.99 |
Sex (male) | 0.49 | 0.21 to 1.13 | 0.10 |
White ethnicity (reference category) | 1.00 | – | – |
Black or Black British ethnicity | 3.10 | 0.30 to 31.62 | 0.34 |
Asian or Asian British ethnicity | 0.79 | 0.24 to 2.65 | 0.71 |
Mixed ethnicity | 1.17 | 0.11 to 12.41 | 0.90 |
Other ethnicity | 1.68 | 0.27 to 10.66 | 0.58 |
Ethnicity not stated | 2.01 | 0.09 to 43.04 | 0.66 |
Eligibility for prealert* | |||
Paramedic arrives within 5 h (yes) | 2.99 | 1.37 to 6.50 | 0.006 |
No FAST symptoms present (reference category) | 1.00 | – | – |
1 FAST symptom present | 6.14 | 2.06 to 18.30 | 0.001 |
2 FAST symptoms present | 31.36 | 9.91 to 99.24 | <0.001 |
3 FAST symptoms present | 75.84 | 24.68 to 233.03 | <0.001 |
GCS >13 | 0.04 | 0.01 to 0.14 | <0.001 |
Evidence of fit (yes) | 0.23 | 0.01 to 6.40 | 0.39 |
Service factors | |||
Highest grade of EMS staff in attendance (paramedic) | 1.35 | 0.81 to 2.25 | 0.25 |
Hospital site (1 of 2) | 2.22 | 1.00 to 4.90 | 0.05 |
Hospital arrival within working hours (09:00–17:00) (yes) | 0.73 | 0.34 to 1.57 | 0.43 |
Stroke final diagnosis (stroke) | 2.09 | 0.56 to 7.78 | 0.27 |
One patient was excluded from this analysis due to missing data relating to age.
Being FAST positive was a significant predictor of prealert using the likelihood ratio test (p<0.001), but ethnicity was not (p=0.91).
*Blood glucose and evidence of seizure variables were removed from the model due to colinearity.
EMS, emergency medical services; FAST, Face, Arm, Speech Test.