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Table 2 IE prevalence for steps in the flowchart

From: Proposal for the use of echocardiography in bloodstream infections due to different streptococcal species

  Number of BSIs Number of IE cases IE prevalence with [95% CI]
Low-risk species, baseline 3230 41 1.3% [0.9–1.7%]
 < 3 positive BC bottles 1500 7 0.5% [0.2–1.0%]
 ≥ 3 positive BC bottles without risk factors 1585 24 1.5% [1.0–2.2%]
 ≥ 3 positive BC bottles with a risk factor 145 10 6.9% [3.4–12.3%]
Moderate-risk species, baseline 2106 136 6.5% [5.4–7.6%]
 < 3 positive BC bottles without risk factors 1163 18 1.5% [0.9–2.4%]
 < 3 positive BC bottles with a risk factor 126 11 8.7% [4.4–15.1%]
 ≥ 3 positive BC bottles without risk factors 685 66 9.6% [7.5–12.1%]
 ≥ 3 positive BC bottles with a risk factor 132 41 31.1% [23.3–39.7%]
High-risk species, baseline 556 95 17.1% [14.0–20.5%]
 < 3 positive BC bottles without risk factors 356 13 3.6% [1.9–6.0%]
 < 3 positive BC bottles with a risk factor 43 6 14.0% [5.3–27.9%]
 ≥ 3 positive BC bottles 157 76 48.4% [40.4–56.5%]
Very high-risk species, baseline 501 179 35.7% [31.5–40.1%]
  1. BC Blood culture, BSI Bloodstream infection, CI Confidence interval, IE Infective endocarditis
  2. Risk factors: native valve disease, prosthetic valve, previous IE or cardiac device