Table 2 Demographic details for Australian cohort with cardiothoracic surgery diagnosis and other diagnoses and Scottish cohort

Number of patients

286

347

167

Sex (% male)

72.7^a

61.1

58.2

Age, yr, mean (SD)

64.7^a

55.9 (18.1)

55.6 (17.0)

APACHE II score, mean (SD)

14.8^a

18.4 (8.3)

18.2 (7.2)

LOS ICU, days median (IQR)

1.1 (0.92–2.2)^a

3.0 (1.3–6.1)

3.7 (1.9–7.9)^b

LOS hospital, days, median (IQR)

9.9 (6.9–14.9)^a

12.8 (6.5–22.0)

15.0 (6.0–29.0)