Table 1 Demographics

Patients n

4361

1112

Age, years (median) [IQR]

64 [52–74]

56 [45–67]

Sex (% male)

57%

50%

APACHE II score (median) [IQR]

15 [1–18]

14 [10–18]

ICU length of stay, days (median) [IQR]

3 [2–6]

3 [2–7]

Hospital length of stay, days (median) [IQR]

15 [9–27]

16 [8–29]

Advanced cardiac support days (median) [IQR]

0 [0–0]

0 [0–0]

Basic cardiac support days (median) [IQR]

3 [2–5]

3 [2–6]

Advanced respiratory support days (median) [IQR]

1 [0–3]

1 [0–3]

Basic respiratory support days (median) [IQR]

1 [0–2]

1 [0–3]

Renal support days (median) [IQR]

0 [0–0]

0 [0–0]

Neurological support days (median) [IQR]

0 [0–0]

0 [0–0]

Liver support days (median) [IQR]

0 [0–0]

0 [0–0]

Dermatological support days (median) [IQR]

0 [0–0]

0 [0–0]

Gastrointestinal support days (median) [IQR]

0 [0–4]

0 [0–5]

Primary reason for ICU admission (ranked by frequency, top 15)

Vascular procedure to major vessel n = 357  8%

Respiratory tract infection n = 101  9%

Respiratory tract infection n = 343  8%

Self-poisoning n = 68  6%

Large bowel tumour n = 301  7%

COPD n = 41  4%

Acute renal failure n = 159  4%

Vascular procedure to major vessel n = 41  4%

Septicaemia and septic shock n = 151  3%

Acute renal failure n = 40  4%

Malignant neoplasm of oesophagus n = 137  3%

Large bowel tumour n = 37  3%

COPD n = 134  3%

Septicaemia and septic shock n = 36  3%

Self-poisoning n = 104 2%

Not recorded n = 35  3%

Not recorded n = 104  2%

Asthma attack in new or known asthmatic n = 28  3%

Bowel perforation n = 89  2%

Status n = 27  2%

Acute pancreatitis n = 79  2%

Bowel perforation n = 25  2%

Asthma attack in new or known asthmatic n = 74  2%

Malignant neoplasm of oesophagus n = 21  2%

Status n = 69  2%

Acute pancreatitis n = 19  2%

Ventricular tachycardia or fibrillation n = 57  1%

Acute myocardial infarction n = 12  1%

Acute myocardial infarction n = 55  1%

Diabetic ketoacidosis n = 12  1%