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Table 1 Characteristics of patients in the Irish health system 1

From: Prevalence and variation of Chronic Kidney Disease in the Irish health system: initial findings from the National Kidney Disease Surveillance Programme

Patient characteristics

Entire cohort

2005

2006

2007

2008

2009

2010

2011

Count (n)

206,729

64,674

71,118

75,956

79,300

81,338

85,200

89,679

Demographics

Age X ¯ S D

54.2 (18.2)

54.4 (18.4)

54 (18.4)

53.9 (18.4)

54.1 (18.2)

54.2 (18.2)

54.4 (18.1)

54.4 (18.1)

Sex

% Women

54.1

54.6

54.0

54.3

54.4

54.2

53.6

53.9

% Men

45.9

45.4

46.0

45.7

45.6

45.8

46.4

46.1

County of Residence (%)

Donegal

53.5

52.9

52.3

53.2

53.6

53.9

54.0

54.5

Sligo

29.6

30.5

30.8

29.9

29.6

29.5

29.0

28.4

Leitrim

12.4

12.0

12.2

12.4

12.3

12.3

12.6

12.6

Other County5

4.51

4.60

4.69

4.51

4.42

4.33

4.47

4.56

Location of Supervision (%) 2

Outpatient Department

7.1

5.3

4.5

4

7.8

8.7

8.7

9.5

General Practitioner

67.8

64.3

67.4

68.2

67.7

67.6

69.3

69.4

Emergency Room

15.1

17.3

16.3

16

14.4

14.5

14.1

14

Inpatient Location

5.0

7.5

6.5

6.5

4.7

4.2

3.3

3.1

Outside facility

5.0

5.6

5.2

5.3

5.5

5.0

4.7

4.0

Kidney Function ( X ¯ S D )

Serum creatinine count

1,388,625

171,922

183,565

199,533

205,493

203,938

204,204

219,970

Serum creatinine (μmol/L)

80.1 (28.8)

82.5 (33.4)

81 (31)

79.7 (29.2)

78.6 (28)

80 (27.3)

79.4 (26.6)

80.1 (26.8)

Mean eGFR (ml/min/1.73 m2)3

86.8 (22.7)

84.8 (23.2)

86.4 (23.1)

87.5 (22.9)

88.2 (22.7)

86.7 (22.5)

87.2 (22.3)

86.5 (22.4)

Minimum GFR (ml/min/1.73 m2)3 (ml/min/1.73 m)2

84.2 (23.9)

82.0 (24.5)

83.7 (24.4)

84.8 (24.3)

85.6 (24)

84.0 (23.7)

84.7 (23.4)

84.0 (23.5)

Maximum eGFR (ml/min.73 m2)3

89.2 (22.4)

87.4 (22.9)

88.9 (22.8)

90.0 (22.5)

90.6 (22.3)

89.1 (22.2)

89.4 (22)

88.8 (22.1)

Serum Electrolytes ( X ¯ S D )

Sodium (mmol/L)

140.2 ( 2.8)

140.1 (2.9)

140.3 (2.8)

140.2 (2.8)

140.3 (2.8)

139.9 (2.7)

140.2 (2.7)

140.5 (2.6)

Potassium (mmol/L)

4.5 ( 0.5)

4.4 (0.5)

4.5 (0.5)

4.5 (0.5)

4.5 (0.5)

4.5 (0.5)

4.5 (0.5)

4.5 (0.5)

Urea (mmol/L)

6.2 ( 2.7)

6.1 (2.8)

6.1 (2.7)

6.1 (2.7)

6.3 (2.7)

6.3 (2.7)

6.3 (2.6)

6.1 (2.6)

Calcium (mmol/L)

2.3 ( 0.1)

2.4 (0.1)

2.3 (0.1)

2.3 (0.1)

2.3 (0.1)

2.3 (0.1)

2.3 (0.1)

2.3 (0.1)

Phosphorous (mmol/L)

1.1 ( 0.2)

1.1 (0.2)

1.1 (0.2)

1.2 (0.2)

1.1 (0.2)

1.1 (0.2)

1.1 (0.2)

1.1 (0.2)

Hematology Variables

Haemoglobin (g/dl)

13.8 (1.6)

13.8 (1.6)

13.9 (1.6)

13.9 (1.6)

13.7 (1.6)

13.7 (1.6)

13.7 (1.6)

13.8 (1.6)

Serum ferritin ng/ml

130.9 (286.4)

127.3 (295.1)

124.0 (341.6)

127.8 (236.8)

128.6 (228)

135.8 (396.3)

132.7 (223.2)

137.2 (254.2)

Other Laboratory Variables

Serum uric acid (UA) (μmol/L)

355.7(109.5)

369.4(119.6)

352.7 (111.8)

346.8 (106.5)

352.2 (106.5)

355.7 (108.9)

354.5 (106.5)

362.9 (108.9)

Acute Kidney Injury 4

% with AKI

3.2

3.3

3.5

3.4

3.2

3.1

2.8

3.0

% of AKI in patients with no CKD

2.0

1.9

2.2

2.11

1.99

2.0

1.8

1.9

% of AKI in patients with CKD

12.6

12.0

12.9

13.68

13.41

12.2

12.0

12.1

  1. 1Values are reported as % or mean with standard deviation.
  2. 2Location of Supervision is defined as the type of facility where the first test was carried out.
  3. 3eGFR CKD-EPI: Glomerular filtration rate (ml/min per 1.73 m2) was based on the Chronic Kidney Disease Collaborative (CKD-EPI) [21].
  4. 4The occurrence of acute kidney injury (AKI) was based on the KDIGO Definition [16].
  5. 5The list of counties and their relative contributions were as follows.
  6. Donegal (n = 101,587), Sligo (n = 50,264), Leitrim (n = 22,356), Galway (n = 329), Derry (n = 418), Cavan (n = 1,251), Tyrone (n = 319), Roscommon (n = 2,403), Mayo (n = 5,546), Fermanagh (n = 158), Longford (n = 229), Westmeath (n = 15). Information on home address was unrecorded for 21,854 patients.
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BMC Nephrology

ISSN: 1471-2369

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