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Volume 25, Number 5—May 2019

CME ACTIVITY - Research

Age-Dependent Increase in Incidence of Staphylococcus aureus Bacteremia, Denmark, 2008–2015

Louise Thorlacius-UssingComments to Author , Haakon Sandholdt, Anders Rhod Larsen, Andreas Petersen, and Thomas Benfield
Author affiliations: Hvidovre Hospital, University of Copenhagen, Copenhagen, Denmark (L. Thorlacius-Ussing, H. Sandholdt, T. Benfield); Statens Serum Institut, Copenhagen (A. Larsen, A. Petersen)

Main Article

Table 2

Incidence rate and incidence rate ratio of Staphylococcus aureus bacteremia stratified by sex and age, Denmark, 2008–2015*

Characteristic IR, SAB/100.000 PY (95% CI) IRR (95% CI)† p value
Sex
F 18.62 (18.06–19.19) Referent NA
M
31.35 (30.61–32.10)
2.00 (1.92–2.08)
<0.001
Age, y
<1 57.96 (51.28–65.12) 17.37 (14.28–21.13) <0.001
1–9 3.35 (2.84–3.91) Referent NA
10–19 3.75 (3.26–4.30) 1.12 (0.91–1.38) 0.281
20–29 3.84 (3.33–4.41) 1.15 (0.91–1.38) 0.199
30–39 6.50 (5.85–7.19) 1.96 (1.63–2.34) <0.001
40–49 12.21 (11.37–13.09) 3.66 (3.09–4.34) <0.001
50–59 22.92 (21.70–24.18) 6.88 (5.84–8.12) <0.001
60–69 46.14 (44.35–47.99) 13.93 (11.86–16.36) <0.001
70–79 81.26 (78.15–84.47) 24.93 (21.23–29.28) <0.001
80–89 145.17 (139.05–151.45) 40.02 (33.35–48.03) <0.001
>90
197.03 (180.80–214.32)
49.97 (39.19–63.72)
<0.001
Period, per-year increment NA 1.04 (1.03–1.05) <0.001

*IR, incidence rate; IRR, incidence rate ratio; NA, not applicable; PY, person-years; SAB, Staphylococcus aureus bacteremia.
†Adjusted for sex, age, and period.

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