Vital signs of the systemic inflammatory response syndrome in adult patients with acute infections presenting in out-of-hours primary care: A cross-sectional study.

For a rapid progression of illness and SpO 2 <94% the association was highly significant ( p < 0.001) with adjusted odds ratio (OR) of 3.75 (95% CI 2.26–6.20) for rapid illness progression and 5.23 (95% CI 2.40–11.4) for peripheral oxygen saturation.

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