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Table 4 Multiple linear regression analysis showing the association of smoking and living in PM2.5 areas with AHRR (cg05575921) methylation in the study participants

From: AHRR cg05575921 methylation in relation to smoking and PM2.5 exposure among Taiwanese men and women

Variable β P value
Smoking status (reference: never)
 Former − 0.03918 < 0.0001
 Current − 0.17536 < 0.0001
 P-trend < 0.0001
Area (reference: north)
 North-center − 0.00267 0.6230
 Center − 0.01356 0.0074
 South − 0.01970 < 0.0001
 P-trend < 0.0001
Exercise (reference: no)
 Yes 0.00086 0.8218
Sex (reference: women)
 Men − 0.01867 < 0.0001
Age − 0.00044 0.0139
BMI 0.00058 0.2527
Alcohol drinking (reference: no)
 Former − 0.00500 0.6027
 Current 0.00156 0.8330
Secondhand smoke exposure (reference: no)
 Yes 0.00139 0.8063