Table 5 Mortality of bloodstream infection (BSI) in two time periods in an area of Mid-Norway. Number of deaths and observed and standardized mortality rates are shown
2002–2007 | 2008–2013 | |||||
|---|---|---|---|---|---|---|
Group of BSI | n | Observed mortality ratea (95% CI) | Age and sex standardized mortality rateb | n | Observed mortality ratea (95% CI) | Age and sex standardized mortality rateb |
All BSIs | 158 | 37 (32–44) | 35 | 141 | 32 (17–53) | 29 |
Place of acquisition | ||||||
CA-BSI | 50 | 12 (9–16) | 11.0 | 35 | 7.9 (5.5–11.0) | 7.1 |
HCA-BSI | 77 | 18 (15–23) | 17.0 | 86 | 19 (16–24) | 17.3 |
HA-BSI | 31 | 7 (5–11) | 7.0 | 20 | 4.5 (2.8–7.0) | 4.1 |
Infection focus | ||||||
Urinary tract | 28 | 7 (4–10) | 6.2 | 35 | 7.9 (5.5–11.0) | 7.0 |
Lungs | 47 | 11 (8–15) | 10.4 | 28 | 6.3 (4.2–9.1) | 5.7 |
Biliary tract | 7 | 1.7 (0.7–3.5) | 1.6 | 8 | 1.8 (0.78–3.6) | 1.5 |
Gastrointestinal tract | 11 | 2.6 (1.2–4.7) | 2.4 | 5 | 1.1 (0.37–2.6) | 1.0 |
Skin or soft tissue | 16 | 3.8 (2.2–6.2) | 3.5 | 18 | 4.1 (2.4–6.4) | 3.7 |
Other | 14 | 3.4 (1.8–5.6) | 3.0 | 14 | 3.2 (1.7–5.3) | 2.9 |
Unknown | 35 | 8 (6–12) | 7.8 | 33 | 7.5 (5.1–10.4) | 6.8 |
Microbe group | ||||||
Gram-negative BSI | 64 | 15 (12–20) | 14.4 | 64 | 14 (11–18) | 13.0 |
Gram-positive BSI | 81 | 19 (15–24) | 17.9 | 63 | 14 (11–18) | 12.7 |
Polymicrobial or fungal BSI | 13 | 3.1 (1.7–5.3) | 2.8 | 14 | 3.2 (1.7–5.3) | 2.8 |
Microbes (the four most common)c | ||||||
Escherichia coli | 31 | 7 (5–11) | 7.1 | 28 | 6.3 (4.2–9.1) | 5.7 |
Streptococcus pneumoniae | 22 | 5 (3–8) | 4.8 | 9 | 2.1 (0.9–3.8) | 1.9 |
Staphylococcus aureus | 30 | 7 (5–10) | 6.7 | 30 | 7 (5–10) | 6.1 |
Klebsiella spp. | 8 | 1.7 (0.7–3.5) | 1.6 | 12 | 2.7 (1.4–4.7) | 2.4 |