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Table 1 Demographic and clinical characteristics of subjects included in study

From: Apolipoprotein B and renal function: across-sectional study from the China health and nutrition survey

Categorical variable

Total

Level 1b

Level 2b

Level 3b

Level 4b

Level 5b

N (ratio)

All

8322

2233

(0.27)

5166

(0.62)

754

(0.09)

139

(0.02)

30

(0.00)

APO_Ba, mg/dL

 95

5085 (61.10)

1692

(75.77)

2954

(57.18)

361

(47.88)

62

(44.60)

16

(53.33)

 95 & < 120

2150 (25.84)

394

(17.65)

1483

(28.71)

227

(30.12)

41

(29.50)

5

(16.67)

  > 120

1087 (13.06)

147

(6.58)

729

(14.11)

166

(22.00)

36

(25.90)

9

(30.00)

Age Groups, years

 18–40

2298 (27.61)

1318

(59.03)

970

(18.78)

8

(1.06)

2

(1.44)

0

(0.00)

 40–65

4682 (56.26)

883

(39.54)

3456

(66.90)

305

(40.45)

30

(21.58)

8

(26.67)

  > 65

1342 (16.13)

32

(1.43)

740

(14.32)

441

(58.49)

107

(76.98)

22

(73.33)

Gender

 Female

4444 (53.40)

1001

(44.83)

2878

(55.71)

456

(60.48)

90

(64.75)

19

(63.33)

 Male

3878 (45.60)

1232

(55.17)

2288

(44.29)

298

(39.52)

49

(35.25)

11

(36.67)

Education, years

  < =6

2187 (26.27)

482

(21.59)

1409

(27.27)

250

(33.16)

35

(25.18)

11

(36.67)

  > 6 & < =12

4139 (49.74)

1115

(49.93)

2540

(49.17)

381

(50.53)

89

(64.03)

14

(46.67)

  > 12 & < =16

1581 (18.90)

495

(22.17)

972

(18.82)

100

(13.26)

10

(7.19)

4

(13.33)

  > 16

415 (4.99)

141

(6.31)

245

(4.74)

23

(3.05)

5

(3.60)

1

(3.33)

Body Mass Index, kg/m2

  < =25

5906 (70.97)

1675

(75.01)

3584

(69.48)

530

(70.29)

94

(67.63)

23

(97.67)

  > 25

2416 (29.03)

558

(24.99)

1582

(30.62)

224

(29.71)

45

(32.37)

7

(2.33)

Region

 Rural

5590 (67.17)

1564

(70.01)

3451

(66.80)

471

(62.47)

84

(60.43)

20

(67.67)

 Urban

2732 (32.83)

669

(29.99)

1715

(33.20)

283

(37.53)

55

(39.57)

10

(33.33)

Hyperuricemia

 No

7042 (84.60)

2031

(90.95)

4408

(85.33)

529

(70.16)

62

(44.60)

12

(40.00)

 Yes

1280 (15.40)

202

(9.05)

758

(14.67)

225

(29.84)

77

(55.40)

18

(60.00)

Diabetes

 No

7528 (90.46)

2162

(96.82)

4679

(90.57)

577

(76.53)

89

(64.03)

21

(70.00)

 Yes

794 (9.54)

71

(3.18)

487

(9.43)

177

(23.47)

50

(35.97)

9

(30.00)

Hypertension

 No

7249 (87.11)

1948

(87.24)

4484

(86.80)

669

(88.73)

119

(85.61)

29

(96.67)

 Yes

1073 (12.89)

285

(12.76)

682

(13.20)

85

(11.27)

20

(14.39)

1

(3.33)

Anemia

 Yes

508 (13.67)

126

(5.64)

272

(5.27)

78

(10.34)

14

(6.72)

18

(60.00)

 No

7814 (86.33)

2107

(94.36)

4894

(94.73)

676

(89.66)

125

(93.28)

12

(40.00)

Smoking

 No

5761 (69.23)

1474

(66.01)

3603

(52.50)

548

(72.68)

111

(79.86)

25

(83.33)

 Yes

2561 (30.77)

759

(33.99)

1563

(47.50)

206

(27.32)

28

(20.14)

5

(16.67)

Alcohol Drinking

 No

5621 (67.54)

1363

(61.04)

3520

(68.14)

586

(77.72)

122

(87.77)

30

(1.00)

 Yes

2701 (32.46)

870

(38.96)

1646

(31.86)

168

(22.28)

17

(12.23)

0

(0.00)

Tea Drinking

 No

5399 (64.88)

1555

(69.64)

3291

(63.70)

449

(59.55)

85

(61.15)

19

(63.33)

 Yes

2923 (35.12)

678

(30.36)

1875

(36.30)

305

(40.45)

54

(38.85)

11

(36.67)

Sleeping Duration, hours/ day

  < =7

2494 (29.97)

519

(23.24)

1660

(32.13)

263

(34.88)

45

(32.37)

7

(23.33)

  > 7 & < =9

4910 (59.00)

1436

(64.31)

3026

(58.58)

368

(48.81)

64

(46.04)

16

(53.33)

  > 9

918 (11.03)

278

(12.45)

480

(9.29)

123

(16.31)

30

(21.58)

7

(23.33)

Albumin, g/dL

  < =35

44 (0.53)

12

(0.54)

17

(0.33)

9

(1.19)

4

(2.88)

2

(6.67)

  > 35 & < =51

7948 (95.51)

2068

(92.61)

4991

(96.61)

731

(96.95)

131

(94.24)

27

(90.00)

  > 51

330 (3.97)

153

(6.85)

158

(3.06)

14

(1.86)

4

(2.88)

1

(3.33)

Triglycerides

 Ideal

5700 (68.49)

1608

(72.01)

3496

(67.67)

488

(64.72)

84

(60.43)

24

(80.00)

 Borderline high

939 (11.28)

207

(9.27)

606

(11.73)

97

(12.86)

28

(20.14)

1

(3.33)

 High

1495 (17.96)

350

(15.67)

954

(18.47)

161

(21.35)

25

(17.99)

5

(16.67)

 Very high

188 (2.26)

68

(3.05)

110

(2.13)

8

(1.06)

2

(1.44)

0

(0.00)

Total Cholesterol

 Desirable

5564 (66.86)

1766

(79.09)

3305

(63.98)

399

(52.92)

76

(54.68)

18

(60.00)

 Borderline high

1976 (23.74)

337

(15.09)

1378

(26.67)

223

(29.58)

30

(21.58)

8

(26.67)

 High

782 (9.40)

130

(5.82)

483

(9.35)

132

(17.51)

33

(23.74)

4

(13.33)

HDLa

 Low

2095 (25.17)

534

(23.91)

1317

(25.49)

198

(26.26)

36

(25.90)

10

(33.33)

 Normal

3533 (42.45)

992

(44.42)

2195

(42.49)

297

(39.39)

55

(39.57)

12

(40.00)

 High

2694 (32.37)

707

(31.66)

1654

(32.02)

277

(36.74)

48

(34.53)

8

(26.67)

LDLa

 Optimal

2992 (35.95)

1132

(50.69)

1642

(31.78)

181

(24.01)

28

(20.14)

9

(30.00)

 Near optimal

2752 (33.07)

685

(30.68)

1771

(34.28)

239

(31.70)

50

(35.97)

7

(23.34)

 Borderline high

1699 (20.42)

300

(13.43)

1170

(22.65)

189

(25.07)

30

(21.58)

10

(33.33)

 High

624 (7.50)

79

(3.54)

425

(8.23)

101

(13.40)

18

(12.95)

1

(3.33)

 Very high

255 (3.06)

37

(0.15)

158

(3.06)

44

(5.84)

13

(9.35)

3

(10.00)

Urea Nitrogen, mg/dL

  < =7.1

7019 (84.34)

2032

(91.00)

4370

(84.59)

554

(73.47)

60

(43.17)

3

(10.00)

  > 7.1

1303 (15.66)

201

(9.00)

796

(15.41)

200

(26.53)

79

(56.83)

27

(90.00)

Continuous variable

Mean (SD)

Screen Time, hours/day

2.19 (1.66)

2

(1.69)

2

(1.65)

2

(1.60)

2

(1.46)

2

(1.89)

Water Drinking, cups/day

3.45 (1.82)

3

(1.81)

3

(1.89)

3

(1.41)

4

(1.73)

3

(1.08)

Fat Intake, g/day

74.97 (41.19)

74

(44.28)

76

(40.96)

72

(34.13)

69

(32.02)

73

(37.08)

Protein Intake, g/day

66.00 (22.96)

69

(24.04)

66

(22.58)

60

(20.97)

54

(17.64)

54

(21.99)

Caloric Intake, kcal/day

885.37 (306.41)

941

(318.17)

881

(298.28)

789

(293.42)

719

(264.65)

731

(292.00)

  1. Level 1: GFR > 90 ml/min/1.73m2;
  2. Level 2: 60 ml/min/1.73m2 < GFR < =90 ml/min/1.73m2;
  3. Level 3: 45 ml/min/1.73m2 < GFR < =60 ml/min/1.73m2;
  4. Level 4: 45 ml/min/1.73m2 < GFR < =30 ml/min/1.73m2;
  5. Level 5: < 30 ml/min/1.73m2
  6. aAPO_B apo-lipoprotein B, HDL high-density lipoprotein, LDL low-density lipoprotein
  7. b Classification follow the K/DOQI Clinical Practice Guidelines for Chronic Kidney Disease,