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Table 1 Baseline characteristics in patients by sex and in the total population studied

From: Acute kidney injury is more common in men than women after accounting for socioeconomic status, ethnicity, alcohol intake and smoking history

Parameter

Total population

Male

Female

P

N

3534

1878

1656

-

Age (years)

60.7 ± 18.8

61.1 ± 17.8

60.3 ± 20.0

0.18

Ethnicity

 White (n, %)

3016 (85.3)

1589 (84.6)

1427 (86.2)

0.49

 Black (n, %)

103 (2.9)

55 (2.9)

48 (2.9)

 Asian (n, %)

338 (9.6)

188 (10.0)

150 (9.1)

 Other (n, %)

77 (2.2)

46 (2.4)

31 (1.9)

Index of multiple deprivation

 1

1571 (44.5%)

815 (43.4%)

756 (45.7%)

0.15

 2

703 (19.9%)

366 (19.5%)

337 (20.4%)

 3

662 (18.7%)

363 (19.3%)

299 (18.1%)

 4–5

268 (7.6%)

157 (8.4%)

111 (6.7%)

Height (m)

1.65 ± 0.12

1.71 ± 0.10

1.57 ± 0.10

< 0.001

Weight (kg)

77.29 ± 20.74

81.77 ± 19.28

72.18 ± 21.16

< 0.001

BMI (kg/m2)

27.16 [8.50]

27.05 [7.50]

27.39 [9.90]

0.03

Diabetes (n, %)

677 (19.2)

389 (20.7)

288 (17.4)

0.01

Hypertension (n, %)

1327 (37.5)

751 (40.0)

576 (34.8)

0.001

Coronary Heart Disease (n, %)

430 (12.2)

300 (16.0)

130 (7.9)

< 0.001

Stroke (n, %)

127 (3.6)

63 (3.4)

64 (3.9)

0.42

Peripheral Vascular Disease (n, %)

168 (4.8)

120 (6.4)

48 (2.9)

< 0.001

Heart Failure (n, %)

318 (9.0)

188 (10.0)

130 (7.9)

0.02

Renal Disease (n, %)

160 (4.5)

92 (4.9)

68 (4.1)

0.25

Liver Disease (n, %)

39 (1.1)

24 (1.3)

15 (0.9)

0.29

Pulmonary Disease (n, %)

860 (24.3)

380 (20.2)

480 (29.0)

< 0.001

Malignancy (n, %)

440 (12.5)

295 (15.7)

145 (8.8)

< 0.001

Charlson Comorbidity Index

1.14 ± 1.50

1.22 ± 1.59

1.05 ± 1.37

0.021

Smoking

 Current

921 (26.1%)

520 (27.7%)

401 (24.2%)

< 0.001

 Ex-smoker

1286 (36.4%)

777 (41.4%)

509 (30.7%)

Alcohol

 Moderate consumption (n, %)

779 (22.0)

547 (29.1)

232 (14.0)

< 0.001

 Higher consumption (n, %)

430 (12.2)

312 (16.6)

118 (7.1)

Antihypertensive drugs (n, %)

1642 (46.5)

914 (48.7)

728 (44.0)

0.002

 ACEI (n, %)

698 (19.8)

428 (22.8)

270 (16.3)

< 0.001

 ARB (n, %)

285 (8.1)

152 (8.1)

133 (8.0)

0.90

 CCB (n, %)

595 (16.8)

344 (18.3)

251 (15.2)

0.02

 Diuretics (n, %)

710 (20.1)

341 (18.2)

369 (22.3)

0.002

 Beta-blockers (n, %)

569 (16.1)

353 (18.8)

216 (13.0)

< 0.001

 Alpha1-blockers (n, %)

194 (5.5)

149 (7.9)

45 (2.7)

< 0.001

Statins (n, %)

430 (12.2)

249 (13.3)

181 (10.9)

0.06

Non-steroidal anti-inflammatory drugs (n, %)

109 (3.1)

54 (2.9)

55 (3.3)

0.47

Proton-pump inhibitors or histamine H2-receptor antagonists (n, %)

943 (26.7)

488 (26.0)

455 (27.5)

0.57

Haloperidol (n, %)

78 (2.2)

35 (1.9)

43 (2.6)

0.18

e-GFR (ml/min/1.73m2)

86.71 [36.59]

86.20 [35.94]

87.39 [37.32]

0.08

Creatinine (μmol/l)

74.00 [31.00]

83.00 [33.00]

64.50 [24.00]

< 0.001

Urea (mmol/l)

6.90 [4.20]

7.10 [4.00]

6.50 [4.40]

< 0.001

Sodium (mmol/l)

138.00 [4.00]

138.00 [4.00]

138.00 [4.00]

0.12

Potassium (mmol/l)

4.20 [0.60]

4.30 [0.60]

4.20 [0.60]

< 0.001

Haemoglobin (g/l)

125.00 [30.00]

129.00 [31.00]

120.00 [28.00]

< 0.001

Anaemia (n, %)

1730 (49.0)

937 (49.9)

793 (47.9)

0.267

  1. ACEI, angiotensin converting enzyme inhibitors; ARB, angiotensin receptor blockers, BMI, body mass index; CCB, calcium channel blockers; IMD, index of multiple deprivation
  2. Normally distributed variables are presented as mean ± standard deviation, non-normally distributed variables as median (interquartile range) and categorical variables as absolute frequency (proportion)