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Table 2 Descriptive information on selected individual characteristics of the third through sixth graders at the 52 elementary schools in southern Taiwan, 2008 and 2009

From: Household secondhand smoke exposure of elementary schoolchildren in Southern Taiwan and factors associated with their confidence in avoiding exposure: a cross-sectional study

Parameter Wave 1 Wave 2   
  Male Female X 2 , t P Male Female X 2 , t P
Children smoking status (n, %)             
   Never smokers 976 82.7 997 90.6 34.10 < 0.001 889 86.0 996 91.8 18.57 < 0.001
   Former smokers 150 12.7 86 7.8    111 10.7 71 6.5   
   Current smokers 54 4.6 17 1.6    34 3.3 18 1.7   
Family smokes (n, %)             
   No 395 33.3 352 31.8 2.15 0.543 383 36.4 378 34.2 4.98 0.173
   Smoking in front of me             
Never 163 13.8 150 13.6    120 11.4 136 12.3   
Sometimes 346 29.2 354 32.0    273 26.0 328 29.7   
Always 281 23.7 251 22.7    276 26.2 264 23.9   
Household SHS exposure (n, %)             
   None 466 40.8 423 39.3 1.32 0.517 429 42.3 454 42.2 0.25 0.883
   1-3 days/week 254 22.3 261 24.3    221 21.8 244 22.7   
   4+ days/week 421 36.9 391 36.4    363 35.8 378 35.1   
Attitude toward smoking (mean ± SD) 17.06 ± 4.65 16.02 ± 3.92 5.75 < 0.001 16.59 ± 4.65 15.93 ± 4.24 3.42 < 0.001
Knowledge (mean ± SD) 7.42 ± 2.33 7.67 ± 2.02 -2.73 0.006 7.55 ± 2.36 7.71 ± 2.11 -1.65 0.010
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