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Table 1 General characteristics of study participants (2008–2015)

From: Methylation at cg05575921 of a smoking-related gene (AHRR) in non-smoking Taiwanese adults residing in areas with different PM2.5 concentrations

Variable

Men

Women

 

All participants

n = 279

n = 429

P value

n = 708

cg05575921 (β value)

0.84260 ± 0.03740

0.82650 ± 0.03920

< .001

0.83626 ± 0.03892

Area

  

0.833

 

 Northern

92 (32.97%)

152 (35.43%)

 

244 (34.46%)

 North-Central

46 (16.49%)

75 (17.48%)

 

121 (17.09%)

 Central

54 (19.35%)

80 (18.65%)

 

134 (18.93%)

 Southern

87 (31.18%)

122 (28.44%)

 

209 (29.52%)

Age (years)

49.42 ± 11.76

49.49 ± 10.97

0.926

49.46 ± 11.28

Alcohol Drinking

  

< .001

 

 No

251 (89.96%)

423 (98.60%)

 

674 (95.20%)

 Former

7 (2.51%)

3 (0.70%)

 

10 (1.41%)

 Current

21 (7.53%)

3 (0.70%)

 

24 (3.39%)

Exercise

    

 No

157 (56.27%)

240 (55.94%)

0.931

397 (56.07%)

 Yes

122 (43.73%)

189 (44.06)

 

311 (43.93%)

BMI (kg/m2)

23.52 ± 3.57

24.95 ± 3.44

< .001

24.08 ± 3.59

SHS

  

0.598

 

 No

251 (89.96%)

391 (91.14%)

 

642 (90.68%)

 Yes

28 (10.04%)

38 (8.86%)

 

66 (9.32%)

  1. Continuous variables are presented as mean ± SD while categorical variables are presented as numbers (%)
  2. SD standard deviation, SHS second-hand smoke