Table 5.

Multivariable Models for Predicting Positive Streptococcus pneumoniae and Legionella pneumophila Urinary Antigen Tests

	Multivariable OR (95% CI)
Streptococcus pneumoniae (n = 81)
Male sex	0.69 (0.43–1.09)
Age ≥65	1.04 (0.61–1.77)
Failure of outpatient antibiotics	0.67 (0.36–1.26)
Fever (>38°C)	1.50 (0.93–2.42)
Hyponatremia	1.81 (0.96–3.41)
ICU admission	1.29 (0.75–2.24)
Pneumonia Severity Index risk class ≥IV	1.46 (0.84–2.55)
Empiric broad spectrum antibiotics	1.16 (0.70–1.94)
Legionella pneumophila (n = 32)
Recent travel	2.18 (0.99–4.76)
Fever (>38°C)	3.21 (1.56–6.60)
Hyponatremia	7.44 (3.5–15.67)
Diarrhea	2.88 (1.39–5.95)

Abbreviations: CI, confidence interval; ICU, intensive care unit; OR, odds ratio.