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Table 1 Characteristics of included studies

From: Biomarkers for diagnosing serious bacterial infections in older outpatients: a systematic review

Author, year and country

Study Type

Study Setting

Number of participants

Age (Years)

Study Duration

Bacterial Infection(s) investigated

Reference test

Caterino et al. (2015), USA [16]

Diagnostic accuracy study

ED

23

65 years and above

N/A

UTI

Urine culture

Caterino et al. (2004), USA [17]

Diagnostic accuracy study

ED

108

65–100

N/A

Bacteraemia

Blood cultures

Cengiz et al. (2013), Turkey [18]

Diagnostic accuracy study

Geriatrics clinics

110

65–96

N/A

Bacterial Infections

FBC, biochemical parameters, CRP, serum protein electrophoresis, urine examination and Chest X-ray. Further tests (e.g. blood/urine/sputum/wound cultures, abdominal USS, chest and/or abdominal CT, MRI) performed as needed.

Chou et al. (2016), Taiwan [19]

Retrospective observational study of diagnostic accuracy

ED

9862

65 years and above

N/A

Bacteraemia

Blood cultures

Ducharme et al., (2007), Canada [20]

Prospective observational study of diagnostic accuracy

ED

100

65 years and above

N/A

UTI

Urine culture

Dwolatzky et al. (2005), Israel [21]

Prospective observational study of diagnostic accuracy

Medical Centre

80

65–101

N/A

Bacteraemia

Blood cultures

Evans et al. (1991), United Kingdom [22]

Diagnostic accuracy study

Day Hospital

50

65–93

N/A

UTI

Mid-stream urine

Juthani-Mehta et al. (2007), USA [23]

Cohort study

Five nursing homes

101

65 years and above

1 year

UTI

Positive urine culture and greater than 10 white blood cells/mm3 on urinalysis

Lai et al. (2010), Taiwan [24]

Diagnostic accuracy study

ED

262

65 years and above

N/A

Bacteraemia

Clinical infection and a positive blood culture

Potts et al. (1999), USA [25]

Retrospective observational study of diagnostic accuracy

ED

117

80 years and above

N/A

Cholecystitis, appendicitis and abscess

Surgical diagnosis

Wasserman et al. (1989), USA [26]

Diagnostic accuracy study

ED

221

70–99

N/A

Bacterial infections

1) Positive blood culture

2) Positive urine culture and pyuria

3) Positive sputum culture and infiltrate on Chest X-ray

4) Positive culture from a normally sterile site or from an abscess cavity.

  1. Abbreviations: CRP C-reactive protein, CT Computerised tomography, ESR Erythrocyte sedimentation rate, MRI Magnetic Resonance Imaging, N/A Not applicable, USS Ultrasound Scan, UTI Urinary Tract Infection