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Table 2 Uni- and multi-variable binary logistic regression analysis to predict ED lengths of stay > 4 h

From: Independent determinants of prolonged emergency department length of stay in a tertiary care centre: a prospective cohort study

 

Univariable analysis OR (95%-CI)

Multivariable analysis Adjusted OR (95% CI)

Age

1.02 (1.02–1.03)

–

Gender (male)

0.99 (0.77–1.29)

–

Arrival by ambulance

1.54 (1.18–2.00)

–

Number of presenting complaints

1.63 (1.42–1.88)

1.19 (1.00–1.41)

Referral status

 Self-referral

Ref

 

 General practitioner

2.12 (1.55–2.90)

–

 Specialist

1.07 (0.73–1.57)

–

Triage category

 Green and blue

Ref

 

 Yellow

3.10 (2.07–4.64)

–

 Red and orange

2.89 (1.88–4.46)

–

Number of comorbiditiesa

1.52 (1.37–1.68)

–

Triage complaint

 Other

Ref

Ref

 Headache

5.88 (2.11–16.39)

3.66 (1.08–12.41)

 Dyspnoea

2.34 (1.46–3.75)

1.48 (0.83–2.65)

 Chest pain

3.18 (1.95–5.18)

2.91 (1.49–5.71)

 Palpitations

1.21 (0.51–2.88)

0.69 (0.24–2.00)

 Abdominal pain

2.22 (1.37–3.60)

1.20 (0.65–2.22)

 Malaise

2.18 (1.46–3.25)

1.37 (0.84–2.24)

 Small traumatic injury

0.47 (0.28–0.79)

0.91 (0.49–1.70)

 Syncope

1.14 (0.48–2.71)

1.03 (0.39–2.77)

Treating physician

 Other specialtiesb

Ref

Ref

 ED physician

1.19 (0.77–1.83)

0.67 (0.38–1.17)

 Internal medicine

3.82 (2.38–6.12)

2.10 (1.21–3.66)

 Cardiology

2.54 (1.45–4.43)

1.36 (0.63–2.89)

 Surgery

1.51 (0.74–3.08)

1.92 (0.80–4.65)

 Neurology

3.37 (1.83–6.18)

2.24 (1.06–4.73)

Diagnostic testing

 Blood testing

10.30 (6.44–16.46)

3.45 (1.95–6.11)

 Urine testing

3.55 (2.67–4.71)

1.79 (1.21–2.63)

 Radiology imaging

4.51 (3.36–6.05)

3.02 (2.13–4.30)

Consultation

4.87 (3.70–6.41)

5.92 (4.08–8.60)

Number of patients in ED at the time of ED registration

 0–5 patients

Ref

Ref

 6–10 patients

1.23 (0.81–1.86)

1.22 (0.76–2.00)

 11–15 patients

1.30 (0.87–1.96)

1.37 (0.85–2.23)

  > 15 patients

1.65 (1.05–2.58)

2.21 (1.30–3.75)

Disposition

 Home

Ref

Ref

 Admission ward

2.80 (2.14–3.67)

2.00 (0.75–1.40)

 Admission ICU/MCU

1.63 (0.79–3.36)

0.26 (0.10–0.66)

  1. Uni- and Multi-variable binary logistic regression analysis was performed with backward entry of all variables. Data are presented as odds ratio (OR (95% CI)). The Hosmer-Lemeshows test had a p-value of 0.905. The area under the curve (c-statistic) was 0.850 (0.827 to 0.873). The VIFs varied between 1.00 and 1.47, never above 3. N = 1434
  2. A “– “indicates that the variable was eliminated from the model, and no independent determinant in the multivariable regression analysis
  3. a The CCI and number of comorbidities were analyzed separately. Both were not associated with ED LOS > 4 h
  4. b Other specialties were pediatrics, ophthalmology, dermatology, otorhinolaryngology, psychiatry and gynecology
  5. Abbreviations: ED emergency department, Ref reference, OR odds ratio, CI confidence interval
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Scandinavian Journal of Trauma, Resuscitation and Emergency Medicine

ISSN: 1757-7241