Skip to main content

Table 3 Clusters detected by the automated cluster alert system in the year 2019 with assessment of relevance by infection control physicians (n = 906)

From: Implementation of an automated cluster alert system into the routine work of infection control and hospital epidemiology: experiences from a tertiary care university hospital

Parameter

Property

Relevant alerts

Non-relevant alerts

Significance

  

Number (%)

Number (%)

p-value (two-tailed)

Cluster size (number of isolates)

All

317 (100)

589 (100)

n.a.

2

154 (48.6)

312 (53.0)

0.23

3

86 (27.1)

173 (29.4)

0.53

>3

77 (24.3)

104 (17.7)

0.02

Ward type

All

317 (100)

589 (100)

n.a.

Adult non-ICU

131 (41.3)

377 (64.0)

<0.01

Adult ICU

162 (51.1)

184 (31.2)

<0.01

NEOPED

24 (7.6)

28 (4.8)

0.11

Pathogen(-group)

All

317 (100)

589 (100)

n.a.

Enterococcus spp.

86 (27.1)

206 (35.0)

0.02

Staphylococcus aureus

34 (10.7)

59 (10.0)

0.83

CNS

25 (7.9)

123 (20.9)

<0.01

Escherichia coli

29 (9.1)

100 (17.0)

<0.01

Klebsiella spp.

70 (22.1)

43 (7.3)

<0.01

Pseudomonas aeruginosa

23 (7.3)

33 (5.6)

0.40

Enterobacter spp.

15 (4.7)

11 (1.9)

0.02

Other

35 (11.0)

14 (2.4)

<0.01

Cluster includes at least one clinical isolate

All

317 (100)

589 (100)

n.a.

Yes

290 (91.5)

557 (94.6)

0.10

No

27 (8.5)

32 (5.4)

0.10

Cluster includes at least one multidrug resistant isolate

All

317 (100)

589 (100)

n.a.

Yes

75 (23.7)

137 (23.3)

0.96

No

242 (76.3)

452 (76.7)

0.96

  1. P-values were calculated using two-sided Chi-squared test. Sampling materials were distinguished into clinical (e.g. blood culture, wound swab) and screening (e.g. rectal swab) isolates. Univariable analysis of characteristics. CNS coagulase-negative staphylococci, ICU intensive care unit, n.a. not applicable, NEOPED neonatology and pediatrics