Table 4 Multivariate analysis using modified least squares regression.

From: Sites of blood collection and topical antiseptics associated with contaminated cultures: prospective observational study

Parameter

Reference

Risk difference

95% CI

P

PVI

ACHX

12.9

8.8–16.9

 < 0.001

CV Other

Venous

17.3

3.6–31.0

0.013

Femoral

Venous

13.1

8.2–17.9

 < 0.001

Male

Female

2.3

-3.4–8

0.425

Age

per 10 years

1.8

0.3–3.2

0.015

Antiseptics and blood sampling sites

PVI/CV Other

ACHX/Femoral

24.5

9.7–67.8

0.004

PVI/Femoral

ACHX/Femoral

20.3

13.5–27.0

 < 0.001

PVI/Venous

ACHX/Femoral

2.2

−2.6 to 7.1

0.362

ACHX/CV Other

ACHX/Femoral

1.7

−2.6 to 6.0

0.444

ACHX/Venous

ACHX/Femoral

−1.1

−4.6 to 2.3

0.524

Male

Female

2.2

−3.5 to 7.9

0.447

Age

per 10 years

1.7

0.2–3.1

0.028

  1. ACHX, 1.0% alcohol/chlorhexidine gluconate; CI confidence interval, CV Other, blood culture sample from recently inserted central venous, venous and arterial catheters, implanted port; Femoral, femoral artery or vein; PVI, 10% aqueous povidone-iodine; Venous, venipuncture without catheter insertion.
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