Table 1 Basic characteristics according to TTR-BMI.

From: Long-term time in target range for body mass index (BMI) and diabetes incidence: insights from CHARLS

Variable

TTR1 N = 3041

TTR2 N = 847

TTR3 N = 853

TTR4 N = 1921

P value

BMI, kg/m²

25.74 ± 3.94

22.38 ± 2.86

21.28 ± 2.93

20.73 ± 1.12

<0.001

Age, years

57.87 ± 8.55

59.18 ± 9.42

60.48 ± 8.96

59.82 ± 8.80

<0.001

Female, n (%)

1805 (59.4)

467 (55.1)

415 (48.7)

832 (43.3)

<0.001

Marital status, n (%)

    

<0.001

 Married or partnered

2647 (87.0)

696 (82.2)

694 (81.4)

1592 (82.9)

 

 Other marital status

394 (13.0)

151 (17.8)

159 (18.6)

329 (17.1)

 

Education, n (%)

    

0.005

 Below high school

2731 (89.8)

782 (92.3)

781 (91.6)

1786 (93.0)

 

 High or vocational school

283 (9.3)

61 (7.2)

63 (7.4)

120 (6.2)

 

 College or above

27 (0.9)

4 (0.5)

9 (1.1)

15 (0.8)

 

Ever smoking, n (%)

986 (32.4)

346 (40.9)

366 (42.9)

928 (48.3)

<0.001

Ever drinking, n (%)

1063 (35.0)

316 (37.3)

331 (38.8)

852 (44.4)

<0.001

Hypertension, n (%)

932 (30.6)

173 (20.4)

164 (19.2)

273 (14.2)

<0.001

Dyslipidemia, n (%)

334 (11.0)

50 (5.9)

36 (4.2)

71 (7.4)

<0.001

Cancer or malignant, n (%)

26 (0.9)

6 (0.7)

5 (0.6)

10 (0.5)

0.556

Chronic lung disease, n (%)

273 (9.0)

84 (9.9)

100 (11.7)

188 (9.8)

0.118

Liver disease, n (%)

97 (3.2)

26 (3.1)

30 (3.5)

67 (3.5)

0.898

Kidney disease, n (%)

165 (5.4)

62 (7.3)

48 (5.6)

95 (4.9)

0.090

Digestive disease, n (%)

656 (21.6)

193 (22.8)

201 (23.6)

472 (24.6)

0.098

Arthritis or rheumatism, n (%)

1059 (34.8)

280 (33.1)

290 (34.0)

619 (32.2)

0.286

Asthma, n (%)

143 (4.7)

45 (5.3)

46 (5.4)

78 (4.1)

0.336

Memory-related disease, n (%)

41 (1.3)

8 (0.9)

18 (2.1)

21 (1.1)

0.123

Psychosomatic disease, n (%)

33 (1.1)

15 (1.8)

12 (1.4)

25 (1.3)

0.448

Physical exercise, n (%)

461 (15.2)

151 (17.8)

151 (17.7)

359 (18.7)

0.008

SBP, mmHg

132.29 ± 21.04

129.55 ± 21.34

127.73 ± 20.89

126.69 ± 20.97

<0.001

DBP, mmHg

77.97 ± 12.25

74.47 ± 11.45

73.12 ± 11.61

72.84 ± 11.81

<0.001

HR, bmp

72.90 ± 10.08

71.42 ± 10.26

71.31 ± 10.50

70.97 ± 10.39

<0.001

BUN, mg/dl

15.51 ± 4.41

15.84 ± 4.57

15.80 ± 4.50

15.94 ± 4.55

0.007

Glucose, mg/dl

105.69 ± 19.70

105.02 ± 19.68

102.25 ± 18.89

102.11 ± 19.74

<0.001

Creatinine, mg/dl

0.77 ± 0.18

0.77 ± 0.19

0.78 ± 0.19

0.79 ± 0.18

0.117

TC, mg/dl

195.49 ± 36.93

191.16 ± 36.69

190.91 ± 36.52

189.71 ± 35.59

<0.001

HDL, mg/dl

48.36 ± 14.30

53.37 ± 15.19

54.32 ± 15.54

55.82 ± 15.53

<0.001

LDL, mg/dl

118.89 ± 34.25

113.93 ± 32.92

115.27 ± 32.48

113.65 ± 32.17

<0.001

UA, mg/dl

4.49 ± 1.25

4.41 ± 1.21

4.37 ± 1.24

4.35 ± 1.20

0.001

eGFR, mL/min/1.73m2

108.28 ± 29.57

109.28 ± 32.29

109.38 ± 32.05

109.98 ± 37.71

0.343

HbA1c, %

5.16 ± 0.44

5.12 ± 0.45

5.09 ± 0.42

5.08 ± 0.45

<0.001

hsCRP, mg/L

1.44 (0.70-3.41)

1.21 (0.60-3.86)

1.07 (0.54-3.58)

1.00 (0.49-3.01)

<0.001

New-onset DM, %

413 (13.6)

73 (8.6)

58 (6.8)

111 (5.8)

<0.001

  1. TTR time in target range, DM diabetes mellitus, BMI body mass index, SBP systolic blood pressure, DBP diastolic blood pressure, HR heart rate, BUN blood urea nitrogen, TC total cholesterol, HDL high-density cholesterol, LDL low-density cholesterol, UA uric acid, HbA1c glycated hemoglobin A1c, hsCRP high sensitivity C-reactive protein, eGFR estimated glomerular filtration rate.