Table 1 General characteristics of the study participants.

From: Serum concentration of polychlorinated biphenyls and the risk of type 2 diabetes: a 10-year follow-up historical cohort study

Parameters

Total (n = 181)

Type 2 diabetes mellitus

p-Value

Yes (n = 59)

No (n = 122)

Age, mean (SD), years

54.67 ± 8.90

58.64 ± 8.05

52.75 ± 8.68

< 0.001a

Weight, mean (SD), kg

77.35 ± 13.96

77.06 ± 13.30

77.48 ± 14.32

 

Waist circumference, mean (SD), cm

100.62 ± 9.58

102.08 ± 9.42

99.92 ± 9.62

0.158a

Hip circumference, mean (SD), cm

109.56 ± 11.00

109. 00 ± 9.20

109.82 ± 11.79

0.642

Triglyceride (TG), mean (SD), mg/dl

153.87 ± 79.29

165.76 ± 83.93

148.11 ± 76.63

 

Total Cholesterol (TC), mean (SD), mg/dl

182.36 ± 40.58

173.08 ± 42.63

186.85 ± 38.95

 

HDL Cholesterol, mean (SD), mg/dl

50.13 ± 11.42

49.83 ± 11.46

50.27 ± 11.44

 

LDL Cholesterol, mean (SD), mg/dl

101.46 ± 35.04

90.10 ± 32.40

106.95 ± 35.07

 

Total serum lipid, mean (SD), mg/dl

568.45 ± 140.47

559.30 ± 158.50

572.90 ± 131.30

0.541

Systolic blood pressure, mean (SD), mmHg

126.25 ± 17.64

132.23 ± 18.94

123.35 ± 16.28

 

Diastolic blood pressure, mean (SD), mmHg

80.90 ± 9.46

81.05 ± 8.92

80.83 ± 9.74

 

FBS, mean (SD), mg/dl

105.85 ± 30.70

134.25 ± 38.42

92.12 ± 10.53

 

Sex, No. (%)

   

0.828

 Male

88 (48.60%)

28 (15.50%)

60 (33.10%)

 

 Female

93 (51.40%)

31 (17.10%)

62 (34.30%)

 

Marital status, No. (%)

   

0.222

 Married

165 (91.10%)

54 (29.80%)

111 (61.30%)

 

 Single

7 (3.90%)

1 (0.60%)

6 (3.30%)

 

 Other

9 (5.00%)

4 (2.20%)

5 (2.80%)

 

Education, No. (%)

   

0.211

 Academic

45 (24.90%)

13 (7.20%)

32 (17.70%)

 

 High school

73 (40.30%)

21 (11.60%)

52 (28.70%)

 

 Guidance school

33 (18.20%)

14 (7.70%)

19 (10.50%)

 

 Primary school

22 (12.20%)

7 (3.90%)

15 (8.30%)

 

 Illiterate

8 (4.40%)

4 (2.20%)

4 (2.20%)

 

Tobacco Use, No. (%)

   

0.926

 Never

110 (60.80%)

34 (18.80%)

76 (42. 00%)

 

 Former

25 (13.80%)

12 (6.60%)

13 (7.20%)

 

 Second-hand user

23 (12.70%)

6 (3.30%)

17 (9.40%)

 

 Current

23 (12.70%)

7 (3.90%)

16 (8.80%)

 

BMI, No. (%)

   

0.332

 Under weight (< 18.5)

3 (1.70%)

0 (0.00%)

3 (1.70%)

 

 Normal weight (18.5–24.9)

37 (20.40%)

12 (6.60%)

25 (13.80%)

 

 Over weight (25–29.9)

65 (35.90%)

19 (10.50%)

46 (25.40%)

 

 Obesity (30–39.9)

70 (38.70%)

26 (14.40%)

44 (24.30%)

 

 Severe obesity (≥ 40)

6 (3.30%)

2 (1.10%)

4 (2.20%)

 

Hypertension, No. (%)

   

0.007a

 Yes

87 (48.10%)

37 (20.40%)

50 (27.60%)

 

 No

94 (51.90%)

22 (12.20%)

72 (39.80%)

 

Dyslipidemia, No. (%)

   

0.6

 Yes

121 (66.90%)

41 (22.70%)

80 (44.20%)

 

 No

60 (33.10%)

18 (9.90%)

42 (23.20%)

 

Vitamin D status, No. (%)

   

0.592

 Deficient (< 20 mg/dl)

70 (38.70%)

22 (12.20%)

48 (26.50%)

 

 Insufficient (20–30 mg/dl)

57 (31.50%)

23 (12.70%)

34 (18.80%)

 

 Sufficient (≥ 30 mg/dl)

54 (29.80%)

14 (7.70%)

40 (22.10%)

 

Physical activity (IPAQ), No. (%)

   

0.921

 Low (inactive)

145 (80.10%)

46 (25.40%)

99 (54.70%)

 

 Moderate (minimally active)

30 (16.60%)

12 (6.60%)

18 (9.90%)

 

 High (HEAP active)

6 (3.30%)

1 (0.60%)

5 (2.80%)

 

Family history of being diabetes, No. (%)

   

< 0.001a

 Yes

81 (44.80%)

41 (22.70%)

40 (22.10%)

 

 No

98 (54.10%)

17 (9.40%)

81 (44.80%)

 

 Unknown

2 (1.10%)

1 (0.60%)

1 (0.60%)

 

Having the occupational exposure, No. (%)

8 (4.40%)

2 (1.10%)

6 (3.30%)

0.641

  1. HDL high-density lipoprotein, LDL low-density lipoprotein, SD standard deviation, BMI body mass index, FBS fasting blood sugar, IPAQ international physical activity questionnaire.
  2. ap < 0.2: for selecting covariates by simple logistic regression