Table 2

Relative risk of hospital admission, death and utilisation of diagnostic tools by age and admission route, comparing high acuity/priority cluster to low acuity/priority cluster (n=23 615)

Age groupsAdmission routeAdmission hospitalDeathUtilisation at ED
x-RayLaboratoryECG
RR95% CIRR95% CIRR95% CIRR95% CIRR95% CI
All agesMed†4.77***4.14 to 5.495.50***4.21 to 7.191.20***1.14 to 1.271.77***1.70 to 1.832.98***2.82 to 3.15
Surg‡5.53***4.19 to 7.307.20***3.10 to 16.761.090.98 to 1.224.28***3.34 to 5.484.73***3.45 to 6.50
Combined§4.864.28 to 5.525.584.31 to 7.221.181.12 to 1.24NHNHNHNH
18 to 35Med3.89***2.30 to 6.571.110.94 to 1.301.89***1.71 to 2.103.47***2.90 to 4.14
Surg6.16***3.00 to 12.660.950.76 to 1.184.39***2.73 to 7.046.53***3.02 to 14.1
Combined4.382.86 to 6.731.050.93 to 1.20NHNH3.56***3.00 to 4.23
36 to 50Med4.07***2.85 to 5.236.18*2.41 to 15.881.000.88 to 1.151.88***1.73 to 2.052.88***2.52 to 3.30
Surg4.91***2.68 to 9.011.140.94 to 1.393.78***2.15 to 6.664.16***1.98 to 8.73
Combined4.21***3.09 to 5.761.040.92 to 1.16NHNH2.912.55 to 3.31
51 to 70Med4.84***3.72 to 6.294.09***2.53 to 6.601.201.09 to 1.331.75***1.64 to 1.872.82***2.55 to 3.12
Surg7.16***4.26 to 12.048.350.88 to 79.621.100.88 to 1.384.41***2.59 to 7.495.36***2.79 to 10.3
Combined5.063.98 to 6.434.152.59 to 6.661.19**1.08 to 1.30NHNHNHNH
> 70Med3.77***3.08 to 4.624.26***3.02 to 6.021.17***1.08 to 1.271.45***1.37 to 1.542.40***2.21 to 2.61
Surg5.53***3.57 to 8.557.36*2.84 to 19.051.270.98 to 1.625.01***3.31 to 7.604.88***3.06 to 7.77
Combined3.903.23 to 4.714.403.17 to 6.111.181.09 to 1.28NHNHNHNH
  • *p<0.05;**p<0.001;***p<0.0001.

  • †14 021 valid cases.

  • ‡9594 valid cases.

  • §Combined Mantel–Heanszel relative risk, only presented if the relative risks in the med and surg strata were homogeneous.

  • ¶Not computable due to inexistent deaths high and low acuity/priority cluster; NH, not homogeneous (relative risks from the strata were not homogeneous so the combined relative risk is not presented).

  • ED, emergency department; Med, medical specialties; Surg, surgical specialties.