Table 2

Details of outbreaks.

Outbreak characteristics

Number of outbreaks

Duration of outbreaks (months)

p

Cases

(number)

p

Fatality rate

(%)

p

Median value

(range)

Median value (range)

Median value (range)

Location

EU

16

11 (1–145)

0.3849^a

5 (1–86)

0.4815^a

0

(0–100)

0.4705^a

USA

17

5 (2–40)

9 (1–38)

0

(0–16.7)

Clinical condition

Neoplasia

4

10 (3–25)

0.5059^a

6 (2–11)

0.4391^a

40.9

(0–100)

0.0215^a

Other

29

5(1–145)

8 (1–86)

0

(0–40.0)

Transmission pathways

Multi-vials

10

3.5 (1–14)

6.5 (2–29)

0

(0–81.8)

Capillary blood sampling.

9

9 (2–16)

11 (3–27)

0

(0–40.0)

Standard^†

3

24 (4–40)

31 (14–38)

0(-)

Transvenous biopsy

3

124 (54–145)

0.0303^b

63 (20–86)

0.0012^b

0(-)

0.6384^b

Blood product

2

13.5 (2–25)

3 (1–5)

0(-)

Undefined

6

4.5 (2–17)

2.5 (1–6)

0

(0–100)

Setting

Dialysis

10

3.5 (2–17)

4 (1–14)

0 (-)

Others

23

9 (1–145)

0.0248^a

11 (1–86)

0.0240^a

0

(0–100)

0.1165^a

Total

33

6 (1–145)

-

7 (1–86)

-

0(0–100)

-

^aMann-Whitney U test.

^bKruskal-Wallis one-way analysis of variance by ranks.

† Multiple deficiencies in standard precautions; standard precautions as defined by the Centers for Disease Control and Prevention [10].

Lanini et al. BMC Medicine 2009 7:15   doi:10.1186/1741-7015-7-15