Table 1 Baseline characteristics of study cohort according to different BMI.

From: Relationship between body mass index and renal function deterioration among the Taiwanese chronic kidney disease population

Characteristic

BMI < 18.5

18.5 ≤ BMI <24

24 ≤ BMI <27

27 ≤ BMI

P value*

n = 130

n = 1548

n = 1201

n = 1143

Age, mean (SD), y

59.69 ± 18.55

62.92 ± 14.62

64.57 ± 13.24

60.83 ± 13.29

<0.0001

  20–44

29 (22.31)

179 (11.56)

92 (7.66)

145 (12.69)

<0.0001

  45–64

39 (30.00)

617 (39.86)

473 (39.38)

517 (45.23)

 

  65–74

27 (20.77)

388 (25.06)

343 (28.56)

323 (28.26)

 

  ≥75

35 (26.92)

364 (23.51)

293 (24.40)

158 (13.82)

 

Male sex

50 (38.46)

843 (54.46)

753 (62.70)

645 (56.43)

<0.0001

Comorbid conditions before the date index

  DM

21 (16.15)

558 (36.05)

568 (47.29)

597 (52.23)

<0.0001

  CAD

3 (2.31)

37 (2.39)

42 (3.50)

35 (3.06)

0.3608

  Stroke

14 (10.77)

264 (17.05)

226 (18.82)

194 (16.97)

0.1147

  Cancer

24 (18.46)

151 (9.75)

110 (9.16)

94 (8.22)

0.0021

  Hypertension

58 (44.62)

1109 (71.64)

982 (81.77)

985 (86.18)

<0.0001

  TB

6 (4.62)

29 (1.87)

18 (1.50)

15 (1.31)

0.0411

  COPD

32 (24.62)

321 (20.74)

288 (23.98)

271 (23.71)

0.1410

Charlson comorbidity index

    

0.0006

  ≤3

75 (57.69)

894 (57.75)

601 (50.04)

600 (52.49)

 

  4–5

37 (28.46)

368 (23.77)

341 (28.39)

285 (24.93)

 

  >5

18 (13.85)

286 (18.48)

259 (21.57)

258 (22.57)

 

  Mean (SD)

3.38 ± 2.50

3.53 ± 2.39

3.81 ± 2.46

3.73 ± 2.41

0.0086

ACEI used within 1 year before the index date

18 (13.85)

245 (15.83)

204 (16.99)

195 (17.06)

0.6507

ARB used within 1 year before the index date

49 (37.69)

778 (50.26)

689 (57.37)

736 (64.39)

<0.0001

fibrate used within 1 year before the index date

0 (0.00)

94(5.60)

115 (9.58)

138(12.07)

<0.0001

OHAs used within 1 year before the index date

17 (13.08)

443 (28.62)

484 (40.30)

543 (47.51)

<0.0001

Statin drug used within 1 year before the index date

20 (15.38)

430 (27.78)

380 (31.64)

423 (37.01)

<0.0001

NSAIDs used within 1 year before the index date

41 (31.54)

582 (37.60)

583 (48.54)

570 (49.87)

<0.0001

Initial stage

    

0.3179

  1–3A

60 (46.15)

752 (48.58)

604 (50.29)

592 (51.79)

 

  3B–5

70 (53.85)

796 (51.42)

597 (49.71)

551 (48.21)

 

Smoking

19 (14.62)

341 (22.03)

335 (27.89)

328 (28.70)

<0.0001

Alcohol consumption

8 (6.15)

140 (9.04)

119 (9.91)

150 (13.12)

0.0018

Betel nut chewing

4 (3.08)

69 (4.46)

67 (5.58)

91 (7.96)

0.0007

AC sugar

103.88 ± 34.33

110.28 ± 37.56

118.17 ± 48.87

122.35 ± 48.15

<0.0001

Cholesterol

180.73 ± 41.87

182.68 ± 43.48

184.04 ± 46.67

186.92 ± 47.79

0.1281

TG

96.35 ± 57.58

119.96 ± 71.46

146.93 ± 96.24

168.91 ± 125.71

<0.0001

Na

137.01 ± 14.01

139.62 ± 5.16

139.26 ± 6.09

141.22 ± 46.39

0.3487

K

4.82 ± 3.88

4.44 ± 0.62

4.54 ± 4.48

4.67 ± 5.31

0.5480

Ca

8.86 ± 0.74

8.98 ± 2.63

8.97 ± 0.74

9.03 ± 0.68

0.7959

P

4.17 ± 0.99

4.02 ± 1.07

3.93 ± 0.96

4.04 ± 1.53

0.2067

UA

6.71 ± 2.17

6.74 ± 2.64

7.04 ± 1.88

7.25 ± 2.69

<0.0001

Hb

11.22 ± 3.29

11.75 ± 2.53

12.31 ± 2.41

12.55 ± 2.36

<0.0001

Hct

32.69 ± 7.35

34.77 ± 6.57

36.45 ± 6.21

37.75 ± 16.11

<0.0001

Albumin

4.03 ± 0.43

4.52 ± 14.58

4.09 ± 0.50

4.15 ± 1.63

0.7929

UPCR

1180.51 ± 6016.47

3346.00 ± 90781.26

1119.61 ± 3347.45

1179.61 ± 2543.57

0.6952

eGFR

48.29 ± 38.58

50.89 ± 37.03

51.14 ± 33.75

53.07 ± 35.24

0.2775

  1. *Categorical variables: chi-squared test; continuous variables: ANOVA.
  2. DM, diabetes mellitus; CAD, coronary artery disease; CKD; chronic kidney disease; OHA, oral hypoglycemic agents; TG, total glycerides; UA, urine albumin; Hb, hemoglobin; Hct, hematocrit; UPCR, urine protein-to-creatinine ratio; eGFR, estimated glomerular filtration rate.
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