Table 1 Demographics and mortality for hospitalised patients

Number of patients

73,016

71,381

1635 (2.2%)

Age/years (median (IQR))

56.8 (38–76)

56.5 (38–76)

71.0 (61–84)

<0.001

Male n (%)

38,568 (52.8)

37,706 (53.0)

862 (53)

NS

LOS/days (mean, IQR))

7.55 (1–8)

7.0 (1–7)

31.1 (11–41)

<0.001

Mortality at discharge (% of whole population)

2918 (3.9)

2368 (3.3)

550 (33.6)

<0.001

Total mortality at 90 Days

5546 (7.6)

4830 (6.8)

689 (42.1)

<0.001

Total mortality at 1 year

9088 (12.4)

8301 (11.6)

787 (48.1)

<0.001

Number of patients readmitted during follow-up (until censor 30/9/2011) (%)

18,971 (26.0)

18,709 (26.2)

342 (21.0)

<0.001

eGFR 1st measurement (ml/min/1.73m²) (median (IQR))

76.4 (57.2–92.1)

76.5 (57.5–92.2)

73.2 (45–88.5)

<0.001

eGFR minimum (ml/min/1.73m²) (median (IQR))

73.1 (54.3–89.2)

74.1 (55.6–89.8)

33.3 (18.0–41.5)

<0.001

eGFR on 1st measurement <45/ml/min/1.73m² (%)

7281 (10.0)

6872 (9.6)

409 (25.0)

<0.001

eGFR minimum <45/ml/min/1.73m² (%)

4372 (6.0)

4157 (5.8)

215 (13.1)

<0.001

Creatinine on first measurement >177 μmol/L (>2 mg/dL)(%)

2290 (3.1)

2137 (3.0)

153 (9.4)

<0.001

Creatinine minimum >177 μmol/L (>2 mg/dL)(%)

1022 (1.4)

949 (1.3)

73 (4.5)

<0.001

 Diabetes mellitus n (%)

7571 (10.4)

7227 (10.0)

344 (21.0)

<0.001

 Hypertension n (%)

15,503 (21.2)

14,877 (20.8)

626 (38.3)

<0.001

 Ischaemic heart disease n (%)

4001 (5.5)

3832 (5.4)

169 (10.3)

<0.001

 Heart failure n (%)

2460 (3.4)

2183 (3.1)

227 (13.9)

<0.001

 Vascular disease n (%)

762 (1.0)

715 (1.0)

47 (2.9)

<0.001

 Malignancy n (%)

5518 (7.6)

5225 (7.3)

293 (17.9)

<0.001

 Composite of Infection n (%)

4920 (6.7)

4457 (6.2)

463 (28.3)

<0.001

 Liver Disease n (%)

1351 (1.9)

1167 (1.63)

184 (11.3)

<0.001

 Composite of GI blood loss or hypovolemia n (%)

2058 (2.8)

1910 (2.7)

148 (9.1)

<0.001

 CRP measurement

30,688 (42)

29,146 (40)

1542 (94)

<0.001

 Average CRP (in those who had CRP measured)

88

83

174

<0.001