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Table 2 Univariate analyses of individual patient factors in relation to ultimate hospital mortality

From: Characteristics and outcome for admissions to adult, general critical care units with acute severe asthma: a secondary analysis of the ICNARC Case Mix Programme Database

  Deaths n a % OR (95% CI)
Age (years)     
   0–19 7 230 3.0 1.68 (1.54–1.85) per 10 year increase
   20–29 10 336 3.0  
   30–39 7 348 2.0  
   40–49 28 338 8.3  
   50–59 35 328 10.7  
   60+ 112 461 24.3  
Sex     
   Female 142 1365 10.4 1.00
   Male 57 676 8.4 0.79 (0.57–1.09)
Steroid treatment in previous 6 months     
   No 175 1755 10.0 1.00
   Yes 24 286 8.4 0.83 (0.53–1.29)
CPR within 24 hours before admission     
   No 123 1861 6.6 1.00
   Yes 73 165 44.2 11.21 (7.84–16.03)
Neurological insult in first 24 hours     
   No 122 1829 6.7 1.00
   Yes 77 212 36.3 7.98 (5.09–10.95)
Highest heart rate (beats/min)     
   <124 57 661 8.6 1.08 (1.01–1.15) per 10 beats/min increase
   124–141 63 700 9.0  
   ≥141 73 641 11.4  
Highest respiratory rate (breaths/min)     
   <26 17 492 3.5 1.01 (0.89–1.15) per 5 breaths/min increase
   26–33 15 462 3.2  
   ≥33 22 471 4.6  
Lowest Pao2 (kPa)     
   <9.8 81 585 13.9 0.89 (0.76–1.05) per 5 kPa increase
   9.8–12.4 57 618 9.2  
   ≥12.4 52 614 8.5  
pH from ABG with lowest Pao2     
   <7.32 99 556 17.8 1.62 (1.37–1.91) per pH 0.1 increase
   7.32–7.41 51 656 7.8  
   ≥7.41 40 603 6.6  
Paco2 from ABG with lowest pH (kPa)     
   <5.7 22 573 3.8 1.62 (1.37–1.91) per 5 kPa increase
   5.7–8.2 62 567 10.9  
   ≥8.2 97 586 16.5  
Acute Physiology Score     
   0–8 19 65 2.9 1.18 (1.15–1.21) per 1 point increase
   9–12 48 590 8.1  
   13+ 114 567 20.1  
APACHE II score     
   0–10 10 594 1.7 1.18 (1.15–1.21) per 1 point increase
   11–15 38 593 6.4  
   16+ 133 621 21.4  
  1. aExcluding admissions who were readmissions to intensive care unit (ICU) within the same hospital stay, admissions whose ultimate hospital discharge status was missing, and admissions missing the specific factor. APACHE, Acute Physiology and Chronic Health Evaluation; CI, confidence interval; CPR, cardiopulmonary resuscitation; OR, odds ratio; Paco2, arterial carbon dioxide tension; Pao2, arterial oxygen tension.