Table 1

Main prognostic factors for death due to COPD within 3 months of admission in 1342 patients with known outcomes

No of patientsNo of deaths% deadRelative risk95% CI
PEF=peak expiratory flow; Sao2=oxygen saturation; IPPV=invasive positive pressure ventilation; NIPPV=non-invasive positive pressure ventilation; NK=not known.
Background and history:
Age
    <65279196.81.0
    65–92112110.01.50.8 to 2.7
    70–43115016.12.41.4 to 3.9
    75–92764114.92.21.3 to 3.7
    80+2595220.13.01.8 to 4.9
    NK61
Performance status
    Normal activity10421.91.0
    Strenuous activity limited143107.03.60.8 to 16.1
    Limited but self-care4194611.05.71.4 to 23.1
    Limited self-care3587721.511.22.8 to 44.8
    Bed care, no self-care391538.520.04.8 to 83.5
    NK2793412.2
Home circumstances
    Alone no support187179.11.0
    Spouse/close relative7549913.11.40.9 to 2.4
    Alone with support2714817.71.91.2 to 3.3
    Nursing home541324.12.71.4 to 5.1
    Other and NK7679.21.00.4 to 2.3
Assessment and measurements on admission:
Bilateral leg oedema
    Yes3387121.02.41.7 to 3.3
    No552498.91.0
    NK4526414.2
Admission PEF (l/min)
    Not done65310716.42.71.5 to 4.9
    Unrecordable1092220.23.31.7 to 6.5
    ≤150336298.61.40.7 to 2.7
    >150179116.11.0
    NK651523.1
Sao2 (%)
    <861664426.52.31.6 to 3.2
    86–922563614.11.20.8 to 1.8
    >925906811.51.0
    NK3303610.9
pH
    <7.26682841.23.82.7 to 5.4
    7.26–7.341463020.51.91.3 to 2.8
    7.35+8318910.71.0
    NK2973712.5
Initial management (within the first 24 hours):
Repeat of blood gas measurements
    Yes4308419.52.01.5 to 2.7
    No603599.81.0
    NK34514.7
    No record of test on admission2753613.1
IPPV or NIPPV
    Yes391743.63.42.3 to 5.0
    No130316712.81.0