Table 3

 Independent risk factors for adverse outcomes following discharge

Independent risk factors for outcomesAdjusted hazard ratio(95% CI)p value
*Recurrent life threatening event defined as recurrent acute hypercapnic respiratory failure requiring assisted ventilation or death.
    Katz score 0–41.75 (1.10 to 2.76)0.018
    >21 days in hospital in previous year1.74 (1.11 to 2.74)0.016
Recurrent life threatening event*
    On long term oxygen before index admission2.07 (1.30 to 3.30)0.002
    APACHE II score (per 5 point increase)1.34 (1.09 to 1.66)0.006
    Body mass index (per 1 kg/m2 increase)0.93 (0.87 to 0.99)0.041
    MRC dyspnoea score 4–53.07 (1.75 to 5.41)<0.001