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Table 1 Baseline and biochemical characteristics by ALP quintiles (Q1-Q5) in patients with AIS with preserved renal function

From: Relationship between serum alkaline phosphatase and poor 3-month prognosis in acute ischemic stroke patients with preserved renal function: results from Xi’an Stroke Registry Study of China

Variables

Overall

(n = 1922)

ALP Quintiles, U/L

P value

Q1

(n = 364)

Q2

(n = 383)

Q3

(n = 402)

Q4

(n = 387)

Q5

(n = 386)

Age, years

63.1 ± 12.0

63.5 ± 12.6

62.8 ± 12.1

63.0 ± 11.8

62.8 ± 12.5

63.4 ± 11.0

0.879

Sex, n (%)

      

0.002

 man

1198(62.3)

241(66.2)

260(67.9)

241(60)

243(62.8)

213(55.2)

 

 women

724(37.7)

123(33.8)

123(32.1)

161(40)

144(37.2)

173(44.8)

 

Educational level, n (%)

      

0.336

 Elementary or below

888(46.2)

155(42.6)

177(46.2)

200(49.8)

170(43.9)

186(48.2)

 

 Middle school

386(20.1)

75(20.6)

85(22.2)

66(16.4)

81(20.9)

79(20.5)

 

 High school or above

648(33.7)

134(36.8)

121(31.6)

136(33.8)

136(35.1)

121(31.3)

 

Smoking, n (%)

      

0.003

 Never smoking

1057(55.0)

204(56)

204(53.3)

232(57.7)

194(50.1)

223(57.8)

 

 Smoking cessation

375(19.5)

88(24.2)

75(19.6)

72(17.9)

87(22.5)

53(13.7)

 

 Current smoking

490(25.5)

72(19.8)

104(27.2)

98(24.4)

106(27.4)

110(28.5)

 

Drinking, n (%)

473(24.6)

84(23.1)

108(28.2)

96(23.9)

103(26.6)

82(21.2)

0.169

Prior stroke, n (%)

504(26.2)

102(28)

103(26.9)

110(27.4)

95(24.5)

94(24.4)

0.694

NIHSS score on admission, n (%)

3.0(1.0,5.0)

3.0(1.0,5.0)

3.0(1.0,5.0)

3.0(1.0,5.0)

4.0(1.0,5.0)

4.0(1.0,6.0)

0.059

Pneumonia during hospitalization, n (%)

67(3.5)

21(5.8)

7(1.8)

4(1)

21(5.4)

14(3.6)

0.001

BMI, kg/m2

24.0 ± 3.5

24.1 ± 3.9

24.1 ± 3.7

24.0 ± 3.4

23.9 ± 3.0

23.8 ± 3.3

0.824

SBP on admission, mmHg

144.7 ± 21.0

142.9 ± 20.2

143.5 ± 20.5

144.9 ± 20.3

146.0 ± 21.4

145.9 ± 22.5

0.158

DBP on admission, mmHg

85.7 ± 12.2

85.2 ± 11.0

84.0 ± 12.4

86.1 ± 12.0

86.5 ± 12.4

86.5 ± 12.7

0.019

Hypertension, n (%)

1313(68.3)

247(67.9)

244(63.7)

281(69.9)

274(70.8)

267(69.2)

0.24

Diabetes mellitus, n (%)

409(21.3)

68(18.7)

87(22.7)

87(21.6)

72(18.6)

95(24.6)

0.186

Atrial fibrillation, n (%)

106(5.5)

20(5.5)

24(6.3)

16(4)

22(5.7)

24(6.2)

0.623

Laboratory findings

 Total cholesterol, mmol/L

4.4 ± 1.0

4.3 ± 1.0

4.4 ± 1.0

4.4 ± 1.1

4.4 ± 1.0

4.4 ± 1.0

0.252

 Triglycerides, mmol/L

1.7 ± 1.3

1.5 ± 1.1

1.7 ± 1.3

1.7 ± 1.4

1.8 ± 1.4

1.7 ± 1.2

0.177

 HDL-C, mmol/L

1.1 ± 0.3

1.1 ± 0.3

1.1 ± 0.3

1.1 ± 0.3

1.1 ± 0.3

1.1 ± 0.3

0.9

 LDL-C, mmol/L

2.6 ± 0.8

2.5 ± 0.8

2.6 ± 0.8

2.6 ± 0.9

2.6 ± 0.8

2.6 ± 0.9

0.356

 Fasting blood glucose, mmol/L

5.9 ± 2.3

5.5 ± 1.7

5.9 ± 2.3

5.8 ± 2.2

6.0 ± 2.5

6.2 ± 2.7

0.004

 ALT, U/L

19.0(14.0,28.0)

17.2(13.0,26.0)

18.0(14.0,26.0)

19.0(14.0,29.0)

21.0(14.3,30.0)

21.0(15.1,29.8)

 < 0.001

 AST, U/L

21.0(17.0,27.1)

20.0(16.1,27.0)

20.0(17.0,25.0)

22.0(17.0,27.0)

22.0(17.0,30.0)

22.0(18.0,29.4)

 < 0.001

 ALP,U/L

79.3 ± 27.8

48.3 ± 10.0

64.1 ± 3.0

75.4 ± 3.4

88.5 ± 4.4

118.3 ± 30.7

 < 0.001

 Homocysteine, μmol/L

21.6 ± 14.3

19.4 ± 12.7

21.5 ± 14.9

20.7 ± 13.3

23.1 ± 16.5

23.1 ± 13.9

0.015

 Serum creatinine, mg/dL

0.8 ± 0.2

0.8 ± 0.2

0.8 ± 0.2

0.8 ± 0.2

0.8 ± 0.2

0.8 ± 0.2

0.038

 eGFR, mL/min/1.73 m2

80.6 ± 10.6

81.2 ± 10.2

80.7 ± 11.0

80.8 ± 10.9

80.2 ± 10.5

80.1 ± 10.3

0.613

 Blood Urea Nitrogen, mmol/L

4.9 ± 1.6

4.9 ± 1.6

4.9 ± 1.5

4.8 ± 1.5

5.1 ± 1.8

4.9 ± 1.4

0.221

 Uric Acid, μmol/L

285.2 ± 91.1

280.6 ± 92.6

291.4 ± 92.7

285.0 ± 88.9

292.3 ± 94.2

276.7 ± 86.5

0.08

 Leukocyte values, × 109/L

6.9 ± 2.4

6.5 ± 2.2

6.7 ± 2.2

6.7 ± 2.2

7.1 ± 2.6

7.2 ± 2.5

 < 0.001

  1. Abbreviations: NIHSS National Institutes of Health Stroke Scale, HDL-C High density lipoprotein cholesterol, LDL-C Low density lipoprotein cholesterol, ALT Alanine aminotransferase, AST Aspartate aminotransferase, ALP Alkaline phosphatase, eGFR estimated glomerular filtration rate, BMI Body mass index, SBP Systolic blood pressure, DBP Diastolic blood pressure
  2. Q1: < 58.8 U/L, Q2: 58.8–69.5 U/L, Q3: 69.6–81.6 U/L, Q4: 81.7–97.5 U/L, Q5: ≥ 97.6 U/L