Table 2 Number, rate and incidence of bloodstream infections and contaminants for each period

ICU patients

7273

3697

3576

ICU patients with BC collection

4491

2639

1852

Cumulative ICU days

35,460

19,292

16,177

BC sets

17,466

14,735

2731

Bottles of BC

41,251

30,444

10,807

BC sets/patients

3.9 ± 7.2

5.6 ± 9

1.5 ± 1.1

 <0 .001

BC sets per 1000 patient-days

411

764

169

 < 0.001

Bottles of BC/patients

9 ± 15

12 ± 19

6 ± 5

 < 0.001

Bottles of BC per 1000 patient-days

971

1578

668

 <0 .001

Positive BC (pathogens and BCC)

959

643

316

 <0 .001

BCC

 Number

366

295

71

–

 Rate by BC sets, % (95% CI)

2.1 (1.9–2.3)

2.0 (1.8–2.2)

2.6 (2.1–3.2)

0.06

 Rate by patient

8.1 (7.4–9)

11.2 (10–12.5)

3.8 (3–4.8)

 <0 .001

 Per 1000 patient-days

10.3 (9.3–11.3)

15.3 (13.6–17.1)

4.4 (3.4–5.5)

 < 0.001

 Rate among positive BC

38.2 (35.2–41.4)

45.9 (42.1–50)

22.5 (18.1–27.6)

 < 0.001

 Rate by bottle of BC

1.1

1.1

0.9

0.1

BSI

 Number

593

348

245

–

 Rate by BC sets, % (95% CI)

3.4 (3.1–3.7)

2.4 (2.1–2.6)

9 (7.9–10.1)

 <0 .001

 Rate by ICU stay

13.2 (12.2–14.2)

13.2 (11.9–14.6)

13.2 (11.7–14.9)

 > 0.99

 Per 1000 patient-days

16.7 (15.5–18)

18 (16.1–20.1)

15.1 (13.3–17.1)

0.1

 Rate among positive BC

61.8 (58.7–64.9)

54.1 (50.2–58)

77.5 (72.2–81.7)

 <0 .001

 Rate by bottle of BC

4.3

3.6

2.2

 < 0.001