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. 2025 Feb 3;25:52. doi: 10.1186/s12911-025-02888-x

Table 3.

Factors associated with potential under-triage: mixed effects regression modelling results

Model 1: Odds of potential under-triage, where secondary triage > = care within 24 h selected, and patient subsequently assessed as requiring immediate or very urgent emergency care in ED Model 2: Odds of potential under-triage, where secondary triage > = care within 24 h selected in patients subsequently admitted for inpatient care
OR (95% CI) Joint p -value OR (95% CI) Joint p -value
Sex
Male 1.09 (0.87–1.35) 0.455 0.98 (0.86–1.12) 0.784
Female Ref ref
Main presenting symptom Main presenting symptom
Abdominal pain Ref Abdominal pain ref
High Temperature 1.66 (1.01–2.73) High Temperature 1.25 (0.93–1.68)
Cough 1.51 (0.90–2.53) Cough 1.33 (0.97–1.82)
Breathlessness 0.90 (0.52–1.55) Vomiting 0.95 (0.68–1.35)
Rash 0.90 (0.49–1.67) Rash 1.24 (0.84–1.82)
Chest Pain 0.71 (0.37–1.36) Breathlessness 0.58 (0.40–0.84)
Vomiting 0.99 (0.50–1.98) 0.020 Unwell 1.10 (0.74–1.64) < 0.001
Unwell 1.25 (0.58–2.70) Urinary Symptoms 1.49 (1.00–2.23)
Palpitations 0.57 (0.23–1.41) Diarrhoea 1.81 (1.18–2.76)
Back pain 1.06 (0.43–2.60) Back pain 1.32 (0.87–1.99)
Other 1.41 (0.94–2.11) Other 1.33 (1.10–1.62)
IMD Decile
1 (most deprived) 0.75 (0.47–1.22) 0.78 (0.58–1.03)
2 0.81 (0.48–1.37) 0.81 (0.60–1.10)
3 0.82 (0.48–1.39) 0.78 (0.57–1.07)
4 0.77 (0.44–1.34) 0.88 (0.63–1.23)
5 0.65 (0.35–1.19) 0.968 0.89 (0.63–1.26) 0.601
6 Ref ref
7 0.67 (0.34–1.33) 0.79 (0.54–1.13)
8 0.71 (0.37–1.37) 0.92 (0.65–1.30)
9 0.72 (0.35–1.46) 1.03 (0.71–1.50)
10 (least deprived) 0.85 (0.40–1.77) 0.88 (0.58–1.34)
Age Group
Infancy - under 24 months 1.14 (0.67–1.92) 1.19 (0.88–1.61)
2–4 (young child) 1.48 (0.86–2.55) 1.16 (0.82–1.64)
5–15 (child) 1.19 (0.68–2.08) 1.07 (0.77–1.50)
16–24 (young adult) 1.32 (0.75–2.33) 0.90 (0.65–1.26)
25–34 0.77 (0.44–1.36) 0.87 (0.64–1.19)
35–44 1.27 (0.69–2.33) 0.1419 1.03 (0.73–1.46) 0.0169
45–54 Ref ref
55–64 0.96 (0.53–1.73) 0.79 (0.56–1.10)
65–74 0.85 (0.46–1.55) 0.89 (0.65–1.23)
75–84 0.71 (0.39–1.30) 0.72 (0.53–0.99)
85 and over 0.83 (0.44–1.54) 0.76 (0.55–1.06)
Service
Service 1 3.21 (2.09–4.93) 2.45 (1.76–3.42)
Service 2 7.14 (3.74–13.63) < 0.001 5.61 (3.36–9.36) < 0.001
Service 3 Ref ref
Day of Week
Sunday 0.60 (0.40–0.90) 0.94 (0.73–1.22)
Monday 0.74 (0.46–1.19) 1.44 (1.08–1.93)
Tuesday 1.22 (0.76–1.95) 1.37 (1.02–1.85)
Wednesday Ref 0.008 ref 0.009
Thursday 1.07 (0.68–1.67) 1.27 (0.95–1.70)
Friday 0.68 (0.42–1.10) 1.14 (0.85–1.54)
Saturday 0.63 (0.42–0.95) 1.03 (0.80–1.33)
Call Time Period
24:00–06:00 1.35 (0.89–2.05) 1.71 (1.32–2.21)
06:00–12:00 1.30 (0.91–1.85) 0.018 1.39 (1.13–1.70) < 0.001
12:00–18:00 Ref ref
18:00–24:00 0.86 (0.62–1.21) 1.16 (0.95–1.42)
Call minute category
0–5 min 1.01 (0.67–1.53) 1.66 (1.30–2.11)
5–10 min 1.00 (0.74–1.33) 1.01 (0.85–1.20)
10–15 min Ref 0.208 ref < 0.001
15–20 min 0.96 (0.68–1.35) 0.97 (0.80–1.19)
Over 20 min 0.67 (0.47–0.96) 0.83 (0.67–1.04)
Calls by user category
Under 200 0.97 (0.45–2.10) 1.22 (0.74–2.00)
200–1000 1.20 (0.79–1.82) 0.92 (0.63–1.34)
1000–1800 Ref 0.060 ref 0.107
1800–2500 1.36 (0.84–2.19) 1.25 (0.79–1.98)
2500+ 2.36 (1.33–4.19) 1.73 (1.04–2.88)
Clinician conducting triage 7.72 16.15