Table 1

Baseline characteristics of randomised and not randomised patients

Patient group
Randomised (n = 60)Not randomised (n = 176)
*Mean (SD).
Demography
Age (y)*75.1 (10.5)78.3 (9.2)
Male sex (%)38.336.9
Time of arrival
0000–0759 (%)38.343.9
0800–1559 (%)31.733.0
1600–2359 (%)30.023.1
Physiology on arrival
Heart rate (bpm)*111 (21)112 (23)
Respiratory rate (bpm)*35 (7)32 (6)
Systolic blood pressure (mm Hg)*166 (39)165 (36)
Diastolic blood pressure (mm Hg)*92 (21)87 (22)
Arterial blood H+ ion concentration (nmol/l)*64.80 (13.89)61.61 (15.01)
Arterial blood pH*7.197 (0.09)7.221 (0.09)
Arterial blood po2 (kPA)*13.23 (7.42)13.07 (7.08)
Arterial blood pco2 (kPA)*8.22 (2.47)8.07 (2.57)
Arterial blood oxygen saturation (%)*89.9 (10.4)91.8 (7.4)
History (number (%) of patients)
Heart failure24 (40)49 (28)
Ischaemic heart disease32 (53)77 (44)
Diabetes mellitus15 (25)46 (26)
Hypertension22 (37)32 (18)
Chronic obstructive pulmonary disease16 (27)39 (22)