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Table 1 Baseline characteristics of adults with and without acute kidney injury, stratified by body mass index at study entry. Data presented as n (%) or mean (SD)

From: Body mass index and chronic kidney disease outcomes after acute kidney injury: a prospective matched cohort study

 

No Acute Kidney Injury (n = 769)

Acute Kidney Injury (n = 769)

BMI < 20

BMI 20–24.9

BMI 25–29.9

BMI 30+

BMI < 20

BMI 20–24.9

BMI 25–29.9

BMI 30+

n (%)

21 (2%)

125 (17%)

269 (35%)

354 (46%)

16 (2%)

134 (17%)

223 (30%)

396 (51%)

Age

65.9 (13.5)

65.5 (13.9)

68.4 (12.2)

63.1 (11.9)

61.7 (15.1)

64.3 (16.0)

65.9 (12.7)

62.3 (11.2)

Women

14 (67%)

59 (47%)

84 (31%)

167 (47%)

7 (44%)

46 (34%)

49 (22%)

148 (37%)

Race

 White

19 (90%)

102 (82%)

241 (90%)

291 (82%)

11 (69%)

108 (81%)

181 (81%)

307 (77%)

 Black

2 (10%)

9 (7%)

17 (6%)

50 (14%)

4 (25%)

16 (12%)

27 (12%)

70 (18%)

 Other

0

14 (11%)

11 (4%)

13 (4%)

1 (6%)

10 (7%)

15 (7%)

19 (5%)

BMI (kg/m2)

18.4 (1.1)

23.0 (1.4)

27.5 (1.4)

36.3 (6.0)

18.4 (1.1)

22.8 (1.4)

27.3 (1.5)

37.5 (7.3)

eGFR ml/min/1.73m2

Pre- admission

 

72 (23)

71 (24)

66 (22)

71 (26)

74 (29)

72 (29)

66 (25)

66 (25)

3-month baseline

 

77 (25)

73 (25)

70 (24)

74 (24)

74 (36)

70 (31)

64 (25)

65 (26)

Diabetes

3 (5%)

23 (18%)

84 (31%)

161 (45%)

4 (25%)

43 (32%)

87 (39%)

253 (64%)

CVD

7 (33%)

46 (37%)

127 (47%)

141 (40%)

5 (31%)

61 (46%)

103 (46%)

203 (51%)

CHF

2 (10%)

21 (17%)

46 (17%)

53 (15%)

6 (38%)

29 (22%)

55 (25%)

115 (29%)

Sepsis

0

4 (3%)

9 (3%)

13 (4%)

2 (13%)

27 (20%)

29 (13%)

60 (15%)

ICU

12 (57%)

80 (64%)

176 (65%)

205 (58%)

11 (69%)

104 (78%)

169 (76%)

261 (66%)

Smoker

 never

7 (33%)

47 (38%)

123 (46%)

149 (42%)

4 (25%)

53 (40%)

86 (39%)

165 (41%)

 former

9 (43%)

53 (42%)

117 (43%)

166 (47%)

7 (44%)

50 (37%)

105 (47%)

182 (46%)

 current

5 (2%)

23 (18%)

27 (10%)

35 (10%)

5 (31%)

31 (23%)

29 (13%)

47 (12%)

 unknown

0

2 (2%)

2 (1%)

4 (1%)

0

0

3 (1%)

2 (1%)

AKI stage 1

   

15 (94%)

100 (75%)

174 (78%)

264 (67%)

AKI stage 2

   

0

18 (13%)

25 (11%)

75 (19%)

AKI stage 3

   

1 (6%)

16 (12%)

24 (11%)

57 (14%)

  1. AKI acute kidney injury, BMI body mass index, CHF chronic heart failure, CVD cardiovascular disease, eGFR estimated glomerular filtration rate, ICU treated in intensive care unit