Predictors and Outcome of Admission for Invasive Streptococcus pneumoniae Infections at a Canadian Children's Hospital

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Abstract
Rates of admission for invasive Streptococcus pneumoniae infection in children vary considerably between institutions. We performed a retrospective study to investigate factors used in the decision to admit patients with invasive S. pneumoniae infection to Alberta Children's Hospital. Of 254 patients who were initially assessed in the emergency department, 38.2% were admitted to the hospital. Significant risk factors for admission as determined by a logistic regression model included murmur (odds ratio [OR], 18.98; 95% confidence interval [CI], 4.08–88.23), focal infection (OR, 11.41; 95% CI, 5.07–25.67), and older age (OR, 2.72; 95% CI, 1.03–7.17). Higher hemoglobin level (OR, 0.96; 95% CI, 0.93–0.99) and temperature of >38.5°C (OR, 0.39; 95% CI, 0.18–0.85) were associated with a lower risk of admission. Two patients died (case-fatality rate, 0.7%). Despite the low rate of admission for invasive S. pneumoniae infections at our hospital, the mortality rate was comparable with those at institutions with higher rates of admission, thus suggesting that the factors we identified may be useful in deciding whether to admit patients with (or who are at high risk for) invasive S. pneumoniae infections.

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