Table 1 Baseline characteristics of study participants by smoking status among men

From: Cigarette smoking and thyroid cancer risk: a cohort study

Characteristics

 

Smoking status

P for trend

Overall

Never smoker

Ex-smoker

Current smoker

Number

56,060

17,005

16,392

22,663

<0.001

Age (years)a

40.4 (7.7)

39.8 (8.1)

42.2 (8.0)

39.7 (6.8)

<0.001

BMI (kg/m2)

24.5 (2.8)

24.2 (2.8)

24.6 (2.7)

24.6 (2.9)

<0.001

Obesity (%)

40.0

36.7

41.1

41.6

<0.001

Alcohol intake (%)b

19.7

10.3

19.3

27.0

<0.001

Vigorous exercise (%)c

20.4

21.2

27.0

15.1

<0.001

High education level (%)d

97.9

97.1

96.8

99.3

0.212

Diabetes (%)

4.7

3.6

5.4

5.0

<0.001

Hypertension (%)

20.4

19.6

24.2

18.4

<0.001

Systolic BP (mmHg)a

118.5 (12.9)

118.7 (13.0)

119.5 (13.1)

117.6 (12.6)

<0.001

Diastolic BP (mmHg)a

76.8 (8.8)

76.7 (8.8)

77.5 (8.8)

76.4 (8.8)

<0.001

Glucose (mg/dL)a

97.8 (15.9)

97.1 (15.0)

98.6 (15.4)

97.7 (17.0)

0.001

Total cholesterol (mg/dL)a

195.2 (33.0)

193.1 (32.3)

196.5 (33.1)

195.8 (33.4)

<0.001

LDL-C (mg/dL)a

115.7 (29.1)

114.7 (28.4)

116.0 (29.0)

116.3 (29.7)

<0.001

HDL-C (mg/dL)a

49.4 (10.5)

49.8 (10.5)

50.1 (10.6)

48.7 (10.3)

<0.001

Triglycerides (mg/dL)e

124 (88–177)

111 (80–157)

121 (87–172)

137 (97–195)

<0.001

HOMA-IRe

1.93 (1.47–2.55)

1.92 (1.47–2.53)

1.97 (1.51–2.58)

1.91 (1.44–2.55)

0.054

hsCRP (mg/L)e

0.6 (0.3–1.1)

0.5 (0.3–1.0)

0.5 (0.3–1.1)

0.6 (0.3–1.2)

<0.001

  1. Data are presented as the mean (standard deviation), median (interquartile range), or percentage.
  2. BMI body mass index, BP blood pressure, LDL-C low-density lipoprotein-cholesterol, HDL-C high-density lipoprotein-cholesterol, HOMA-IR homeostasis model assessment of insulin resistance, hsCRP high sensitivity C-reactive protein.
  3. aMean (standard deviation)
  4. b≥20 g of ethanol per day
  5. c≥3 times per week
  6. d≥college graduate.
  7. eMedian (interquartile range)
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