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Table 1 General Characteristics of participants by smoking status

From: Is secondhand smoke associated with stress in smokers and non-smokers?

   (unit = n, %)
  Smoking status p-value
  Smoker Ex-smoker Never-smoker
Secondhand smoke exposure state
 Exposure Workplace & home 422 (7.1) 132 (2.4) 978 (6.0) <.0001
  Workplace 2,875 (42.5) 2,160 (38.4) 3,382 (19.9)  
  Home 424 (5.8) 232 (3.7) 1,836 (10.2)  
 Non-exposure 3,516 (44.5) 4,214 (55.5) 13,557 (63.9)  
Sex
 Male   6,120 (86.8) 5,634 (83.4) 2,668 (18.5) <.0001
 Female   1,117 (13.2) 1,104 (16.6) 17,085 (81.5)  
Marital status
 Married   5,789 (72.2) 6,154 (85.7) 17,183 (79.6) <.0001
 Single   1,448 (27.8) 584 (14.3) 2,570 (20.4)  
Age
 19–29   1,113 (22.6) 524 (13.2) 2,557 (20.8) <.0001
 30–39   1,852 (27.8) 1,026 (18.6) 3,689 (19.6)  
 40–49   1,542 (23.2) 1,135 (22.4) 3,694 (21.7)  
 50–59   1,216 (15.5) 1,214 (19.9) 3,676 (17.5)  
 60–69   858 (6.5) 1,399 (13.8) 3,290 (11.0)  
  ≥ 70   656 (4.4) 1,440 (12.0) 2,847 (9.5)  
Income
 Low   2,134 (30.2) 1,513 (22.3) 4,649 (24.8) <.0001
 Middle-low   1,904 (25.7) 1,700 (25.8) 4,860 (24.8)  
 Middle-high   1,674 (23.5) 1,784 (26.3) 5,055 (25.3)  
 High   1,525 (20.6) 1,741 (25.5) 5,189 (25.1)  
Economic status
  Employed   5,510 (78.5) 4,388 (70.8) 10,207 (54.3) <.0001
  Unemployed   1,727 (21.5) 2,350 (29.2) 9,546 (45.7)  
Educational level
 Elementary school 1,295 (12.2) 1,661 (17.8) 6,138 (23.1) <.0001
 Middle school   841 (10.6) 844 (11.1) 2,048 (9.7)  
 High school   2,933 (45.7) 2,230 (37.8) 6,283 (37.0)  
 University & college 2,168 (31.5) 2,003 (33.4) 5,284 (30.2)  
Perceived health status
 Good   5,824 (82.8) 5,343 (82.5) 15,152 (79.8) <.0001
 Bad   1,413 (17.2) 1,395 (17.5) 4,601 (20.2)  
Year
 2007   543 (8.0) 561 (9.1) 1,511 (8.0) <.0001
 2008   1,457 (18.4) 1,240 (18.0) 3,732 (17.4)  
 2009   1,650 (18.7) 1,406 (18.1) 4,318 (19.0)  
 2010   1,329 (19.0) 1,252 (18.9) 3,570 (18.6)  
 2011   1,208 (18.4) 1,177 (17.8) 3,262 (17.8)  
 2012   1,050 (17.5) 1,102 (18.1) 3,360 (19.1)  
Total   7,237 (26.9) 6,738 (19.9) 19,753 (53.2)  
  1. % weighted percentage