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Table 1 Ranking of mean number of items and mean costs per patient plus outcomes

From: Inter-hospital variation in the utilization of diagnostics and their proportionality in the management of adult community-acquired pneumonia

Resource use

Hospital 1 (n = 201)

Hospital 2 (n = 50)

Hospital 3 (n = 40)

Clinical chemistry testing

Creatinine

2.90; 3 [0–22]

Creatinine

4.62; 5 [0–13]

Glucose

5.83; 2 [0–55]

Potassium

2.73; 2 [0–48]

CRP

3.62; 3 [0–8]

Creatinine

4.95; 4 [0–12]

Sodium

2.72; 2 [0–54]

Glucose

3.48; 2 [0–29]

CRP

4.90; 5 [0–11]

CRP

2.21; 2 [0–13]

Hemoglobin

3.46; 3 [0–13]

Sodium

4.35; 4 [0–13]

Leucocytes

1.92; 2 [0–16]

Sodium

3.32; 3 [0–12]

Potassium

4.35; 4 [0–11]

 Mean costs (SE)

€25 (1.5)

€37 (2.9)

€49 (4.5)

Radiological exams

CXR

1.49; 1 [1–8]

CXR

1.40; 1 [0–6]

CXR

1.33; 1 [0–4]

Chest CT

0.11; 0 [0–1]

Echocardiography

0.24; 0 [0–3]

Chest CT

0.13; 0 [0–1]

Abdominal sonography

0.07; 0 [0–1]

Chest CT

0.16; 0 [0–1]

Abdominal sonography

0.13; 0 [0–1]

Echocardiography

0.02; 0 [0–2]

Abdominal sonography

0.04; 0 [0–1]

Echocardiography

0.08; 0 [0–1]

 Mean costs (SE)

€89 (7.5)

€118 (20)

€87 (17)

Microbiological testing

PCR – hybridization*

10.06; 9 [0–37]

AMR detection

3.66; 0 [0–57]

PCR – hybridization*

5.33; 6 [0–15]

Antigen detection

2.22; 2 [0–6]

Antigen detection

2.52; 2 [0–5]

Serologic antibody detection 4.25 5 [0–7]

AMR detection

1.9; 0 [0–32]

Blood culturing

2.40; 2 [0–6]

Blood culturing

2.2; 2 [0–6]

Agar culturing

1.66; 1 [0–9]

Agar culturing

2.18; 2 [0–10]

AMR detection

1.93; 0 [0–44]

Gram staining

1.41; 1 [0–8]

Gram staining

1.6; 1 [0–5]

Antigen detection

1.58; 2 [0–4]

 Mean costs (SE)

€726 (34)

€195 (17)

€476 (44)

Overall mean costs (SE)

€841 (37)

€350 (31)

€612 (46)

Outcomes

Hospital 1

Hospital 2

Hospital 3

 Microbiological diagnostic yield, n (%)$

91 (45)

15 (30)

15 (38)

 Antibiotic de-escalation, n (%)#

57 (30)

21 (48)

13 (33)

 Secondary ICU admissions, n (%)

10 (5)

3 (6)

1 (3)

  1. A maximum of 5 items per category per hospital are listed. Items are only listed if the mean number per patient was ≥0.1 in at least one hospital. Overall mean costs per patient per hospital per category are shown. *counted on pathogen level. Data are presented as mean; median [minimum-maximum], unless stated otherwise
  2. Abbreviations: AMR antimicrobial resistance, CRP C-reactive protein, CT Computed Tomography, CXR Chest X-ray, ICU Intensive Care unit, PCR Polymerase Chain Reaction, SE Standard Error
  3. $p = 0.050 for difference between hospital 1 and hospital 2
  4. #p = 0.018 for difference between hospital 1 and hospital 2