Table 2 Characteristics of the study population by blood lead level quartiles.

From: Blood lead level and its association with body mass index and obesity in China - Results from SPECT-China study

 

Quartile 1

Quartile 2

Quartile 3

Quartile 4

P for trend

Men

 N

561

560

556

558

 

Blood lead level, μg/L

≤29.00

29.01–44.00

44.01–62.16

≥62.17

 

Age, yr

52 (39–61)

52 (42–61)

55 (44–63)

58 (47–65)

<0.001

HDL, mmol/L

1.31(1.12–1.51)

1.32 (1.13–1.54)

1.32 (1.13–1.57)

1.37 (1.17–1.61)

<0.001

LDL, mmol/L

2.91 (2.46–3.39)

2.82 (2.38–3.28)

2.86 (2.43–3.35)

2.93 (2.45–3.35)

0.624

Body mass index, kg/m2

24.5 (22.3–26.6)

24.4 (22.0–26.6)

24.3 (21.9–26.6)

23.9 (21.9–26.6)

0.171

Triglycerides, mmol/L

1.43 (0.99–2.17)

1.43 (1.02–2.08)

1.42 (1.00–2.11)

1.37 (1.01–1.97)

0.575

Weight, %

Overweight

38.1

37.5

37.1

34.1

0.132

Obesity

5.7

4.5

5.6

4.7

0.456

 Diabetes, %

14.6

12.0

13.8

15.1

0.618

 Dyslipidemia, %

36.2

34.8

36.0

29.7

<0.05

 Hypertension, %

41.0

42.1

49.5

52.2

<0.001

 Current smoker, %

43.8

43.8

50.4

55.2

<0.001

 Rural/urban residence, %

36.0/64.0

43.6/56.4

61.3/38.7

72.4/27.6

<0.001

 Low/high economic status, %

31.2/68.8

35.0/65.0

26.3/73.7

17.7/82.3

<0.001

Women

 N

831

831

831

830

 

Blood lead level, μg/L

≤25.13

25.14–37.79

37.80–54.35

≥54.36

 

Age, yr

51 (40–60)

51 (41–61)

53 (43–62)

57 (47–65)

<0.001

HDL, mmol/L

1.48 (1.29–1.68)

1.51 (1.31–1.72)

1.50 (1.31–1.71)

1.50 (1.30–1.76)

<0.05

LDL, mmol/L

2.81 (2.35–3.33)

2.80 (2.36–3.27)

2.88 (2.41–3.38)

2.94 (2.50–3.37)

<0.01

Body mass index, kg/m2

23.3 (21.1–25.7)

23.1 (21.1–25.5)

23.7 (21.5–25.9)

24.1 (21.6–26.7)

<0.001

Triglycerides, mmol/L

1.15 (0.83–1.68)

1.17 (0.86–1.63)

1.24 (0.89–1.76)

1.23 (0.94–1.75)

<0.01

Weight, %

Overweight

26.7

23.8

29.4

31.8

<0.001

Obesity

4.2

5.1

5.4

7.7

<0.001

 Diabetes, %

8.2

9.4

8.9

13.3

<0.01

 Dyslipidemia, %

22.7

21.8

24.9

24.6

0.190

 Hypertension, %

32.3

33.7

39.6

43.7

<0.001

 Current smoker, %

3.1

2.2

2.0

2.3

0.278

 Rural/urban residence, %

46.2/53.8

49.7/50.3

58.4/41.6

76.0/24.0

<0.001

 Low/high economic status, %

33.5/66.5

35.9/64.1

30.8/69.2

19.3/60.7

<0.001

  1. HDL, high-density lipoprotein; LDL, low-density lipoprotein.
  2. Data are summarized as median (interquartile range) for continuous variables, or as number with proportion for categorical variables.
  3. Overweight and obese adults were defined based upon BMI measures of 25–29.9 kg/m2 and ≥30 kg/m2, respectively. Dyslipidemia was defined as total cholesterol ≥6.22 mmol/L, triglycerides ≥2.26 mmol/L, LDL-C ≥ 4.14 mmol/L or HDL-C < 1.04 mmol/L, or self-reported previous diagnosis of hyperlipidemia by physicians.
Back to article page