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Table 1 Case mix for admissions with chronic obstructive pulmonary disease by subgroup

From: Case mix and outcomes for admissions to UK adult, general critical care units with chronic obstructive pulmonary disease: a secondary analysis of the ICNARC Case Mix Programme Database

  All (n = 3752) I. Pneumonia (n = 775) II. Right VF (n = 147) III. Left VF (n = 142)
Age (years; median [IQR]) 67.8 (60.5–73.6) 68.7 (61.4–74.0) 68.8 (61.7–74.0) 71.9 (67.2–75.1)
Sex (n [%] male) 1942 (51.8) 401 (51.7) 83 (56.5) 81 (57.0)
Past medical history (n [%])     
   Respiratory impairment     
Severe respiratory disease 1236 (35.0) 232 (31.6) 57 (42.2) 33 (25.2)
Home ventilation 70 (2.0) 6 (0.8) 6 (4.4) 2 (1.5)
   Steroid treatment 305 (8.6) 61 (8.3) 7 (5.2) 8 (6.1)
   Comorbidity:     
Liver disease 6 (0.2) 3 (0.4) 0 (0.0) 0 (0.0)
Cardiovascular disease 79 (2.2) 11 (1.5) 8 (5.9) 10 (7.6)
Chronic renal failure 11 (0.3) 1 (0.1) 0 (0.0) 0 (0.0)
Immunosuppression 27 (0.4) 3 (0.1) 1 (0.7) 1 (0.8)
Metastatic cancer 6 (0.5) 1 (0.4) 0 (0.0) 0 (0.0)
   Hospital stay prior to unit admission (days; median [IQR]) 1 (0–3) 1 (0–3) 1 (0–2) 0 (0–2)
   CPR prior to admission (n [%])a 308 (8.3) 45 (5.8) 20 (13.8) 12 (8.5)
   Intubation status (n [%])b     
Definitely intubated 2774 (73.9) 605 (78.1) 104 (13.8) 103 (72.5)
Probably intubated 278 (7.4) 56 (7.2) 13 (8.8) 9 (6.3)
Not intubated 700 (18.7) 114 (14.7) 30 (20.4) 30 (21.2)
Physiologyb     
   Lowest pH (median [IQR]) 7.26 (7.18–7.33) 7.26 (7.18–7.33) 7.25 (7.19–7.33) 7.24 (7.15–7.32)
   PaCO2 (kPa; median [IQR])c 8.7 (6.9–10.7) 8.6 (6.9–10.6) 9.1 (7.2–11.7) 7.6 (6.4–10.4)
   PaO2/FiO2 gradient (kPa; median [IQR])d 22.9 (17.2–29.6) 21.2 (15.3–27.8) 20.9 (17.2–26.2) 23.3 (15.9–29.3)
   Lowest serum albumin (g/l; median [IQR]) 28 (23–33) 26 (21–31) 28 (25–32) 30 (25–34)
   APACHE II     
APS (mean [SD]) 13.4 (5.6) 14.3 (5.5) 13.5 (5.1) 14.6 (6.2)
APS (median [IQR]) 12 (10–16) 13 (10–17) 13 (10–17) 14 (10–18)
Score (mean [SD]) 19.4 (6.4) 20.3 (6.3) 19.9 (5.8) 20.7 (6.8)
Score (median [IQR]) 19 (15–23) 19 (16–23) 19 (16–24) 20 (16–24)
   APACHE III     
APS (mean [SD]) 52.9 (21.5) 55.9 (21.6) 53.4 (20.0) 56.8 (21.5)
APS (median [IQR]) 50 (39–64) 52 (42–68) 53 (41–66) 55 (42–68)
Score (mean [SD]) 65.9 (23.0) 69.3 (23.0) 66.6 (21.8) 71.6 (22.9)
Score (median [IQR]) 63 (50–78) 66 (54–83) 66 (52–80) 69.5 (55–84)
   Organ system failures (n [%])     
0 457 (12.2) 85 (11.0) 19 (12.9) 15 (10.6)
1 Respiratory 1767 (45.2) 362 (45.0) 56 (37.4) 55 (33.8)
1 Other 214 (4.4) 60 (9.3) 5 (4.1) 9 (8.5)
2 1036 (27.6) 215 (27.7) 50 (34.0) 50 (35.2)
3 or more 309 (8.2) 54 (7.0) 17 (11.6) 17 (12.0)
  1. aDuring 24 hours before unit admission. bDuring first 24 hours following unit admission. cTaken from ABG with lowest pH. d Taken from ABG with lowest PaO2. ABG, arterial blood gas; APACHE, Acute Physiology and Chronic Health Evaluation; APS, Acute Physiology Score; CPR, cardiopulmonary resuscitation; FiO2, fractional inspired oxygen; IQR, interquartile range; PaO2, arterial carbon dioxide tension; PaO2, arterial oxygen tension; SD, standard deviation; VF, ventricular failure.