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Table 1 Population characteristics grouped according to smoking status

From: Cigarette smoking worsens systemic inflammation in persons with metabolic syndrome

Variable

All participants (N = 5503)

Non-Smokers (±SD) (N = 5,005)

Smokers (±SD) (N = 498)

p- value

Mean age (years)

43.48 ± 9.53

43.45 ± 9.48

43.76 ± 9.98

0.453

Male sex (%)

78.79

78.69

79.83

0.526

Mean waist circumference (cm)

91.59 ± 12.02

91.51 ± 12.02

92.40 ± 12.04

0.089

BMI (Kg/ m 2 )

26.32 ± 3.99

26.30 ± 4.00

26.58 ± 3.72

0.100

Metabolic syndrome (%)

20.09

19.54

25.91

<0.001

Mean Uric acid (mg/ dL)

5.80 ± 1.40

5.80 ± 1.40

5.90 ± 1.38

0.171

Mean HDL-c (mg/ dL)

48.27 ± 13.06

48.48 ± 13.09

46.20 ± 12.58

<0.001

Mean triglyceride (mg/ dL)

136.65 ± 86.69

133.87 ± 81.48

164.90 ± 122.51

<0.001

Mean LDL-c (mg/ dL)

130.74 ± 33.25

130.65 ± 33.09

131.82 ± 34.83

0.423

Mean total cholesterol (mg/ dL)

205.94 ± 37.12

205.60 ± 36.81

209.69 ± 39.92

0.012

On statins (%)

8.65

8.49

10.26

0.150

With hepatic steatosis (%)

36.18

35.57

42.38

0.001

Mean fasting glucose (%)

89.30 ± 10.26

89.27 ± 10.34

89.49 ± 10.63

0.624

Mean SBP (mmHg) ±  SD

118.8 ± 12.7

118.7 ± 12.8

119.8 ± 12.5

0.065

Mean DBP (mmHg) ±  SD

76.9 ± 8.1

76.9 ± 8.1

77.3 ± 8.1

0.295

Hypertension (%)

21.24

12.61

13.22

0.394

On anti- hypertensive medications (%)

12.27

12.24

12.7

0.749

Median hs-CRP (IQR) (mg/L)

1.2 (0.6-2.40)

1.20 (0.60-2.40)

1.40 (0.70-3.00)

<0.001

% Elevated hs- CRP (>3.0 mg/L)

19.24

18.60

26.10

<0.001

  1. SD: standard deviation; BMI: body mass index; HDL-c: high density lipoprotein cholesterol; LDL-c: low density lipoprotein cholesterol; and hs-CRP: high sensitivity C-reactive protein.