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Percentages of normal and abnormal observations taken on arrival of the ambulance clinician(s). The numbers on the graph represent the percentage (rounded to whole numbers) of the 132 incidents, which were analysed in detail. Normal values used are: heart rate 60–100 bpm, respiratory rate 14–18 breaths/minute (males); 16–20 breaths/minute (females), systolic blood pressure 100–140 mm Hg, temperature 36.5–37.5°C, blood glucose 3.5–11.1 mmol/L.
