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Table 2 General characteristics of participants according to stress

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

  (unit = n, %)
  Stress Total p-value
  High Low
Secondhand smoke exposure state
 Exposure Workplace & home 564 (37.2) 968 (62.8) 1,532 (5.6) <.0001
  Workplace 2,678 (31.2) 5,739 (68.8) 8,417 (29.7)  
  Home 867 (34.8) 1,625 (65.2) 2,492 (7.7)  
 Non-exposure 5,145 (25.3) 16,142 (74.7) 21,287 (57.1)  
Smoking status
 Smoker   2,306 (32.8) 4,931 (67.2) 7,237 (26.9) <.0001
 Ex-smoker   1,552 (24.5) 5,186 (75.5) 6,738 (19.9)  
 Non-smoker   5,396 (27.8) 14,357 (72.2) 19,753 (53.2)  
Sex
 Male   3,501 (25.7) 10,921 (74.3) 14,422 (49.8) <.0001
 Female   5,753 (31.2) 13,553 (68.8) 19,306 (50.2)  
Marital status
 Married   7,720 (27.5) 21,406 (72.5) 29,126 (78.8) <.0001
 Single   1,534 (32.2) 3,068 (67.8) 4,602 (21.2)  
Age
 19–29   1,454 (33.5) 2,740 (66.5) 4,194 (19.8) <.0001
 30–39   2,136 (32.9) 4,431 (67.1) 6,567 (21.6)  
 40–49   1,804 (28.1) 4,567 (71.9) 6,371 (22.2)  
 50–59   1,533 (24.4) 4,573 (75.6) 6,106 (17.5)  
 60–69   1,210 (21.7) 4,337 (78.3) 5,547 (10.4)  
  ≥ 70   1,117 (23.4) 3,826 (76.6) 4,943 (8.6)  
Income
 Low   2,516 (31.0) 5,780 (69.0) 8,296 (25.8) <.0001
 Middle-low   2,375 (28.8) 6,089 (71.2) 8,464 (25.2)  
 Middle-high   2,229 (26.7) 6,284 (73.3) 8,513 (25.0)  
 High   2,134 (27.3) 6,321 (72.7) 8,455 (24.0)  
Economic status
 Employed   5,818 (29.6) 14,287 (70.4) 20,105 (64.1) <.0001
 Unemployed   3,436 (26.4) 10,187 (73.6) 13,623 (35.9)  
Educational level
 Elementary school 2,439 (27.2) 6,655 (72.8) 9,094 (19.1) <.0001
 Middle school   847 (23.9) 2,886 (76.1) 3,733 (10.2)  
 High school   3,054 (27.7) 8,392 (72.3) 11,446 (39.5)  
 University & college 2,914 (31.7) 6,541 (68.3) 9,455 (31.2)  
Perceived health status
 Good   6,189 (24.9) 20,130 (75.1) 26,319 (81.1) <.0001
 Bad   3,065 (43.9) 4,344 (56.1) 7,409 (18.9)  
Year
 2007   684 (27.2) 1,931 (72.8) 2,615 (8.2) <.0001
 2008   1,803 (28.8) 4,626 (71.2) 6,429 (17.8)  
 2009   2,195 (31.0) 5,179 (69.0) 7,374 (18.8)  
 2010   1,674 (28.1) 4,477 (71.9) 6,151 (18.7)  
 2011   1,502 (28.1) 4,145 (71.9) 5,647 (18.0)  
 2012   1,396 (26.9) 4,116 (73.1) 5,512 (18.4)  
Total   9,254 (28.5) 24,474 (71.5) 33,728 (100.0)  
  1. % weighted percentage