From: Gender and age differences among current smokers in a general population survey
 | Women | Men | Chi2 |  | P |  | w | ||
---|---|---|---|---|---|---|---|---|---|
 | n ever smokers | % current smokers within ever smokers | n ever smokers | % current smokers within ever smokers |  |  |  |  |  |
Total | 31228 | 64.0 | 47731 | 58.7 | 224.3 | Â | .001 | Â | .05 |
Age | Â | Â | Â | Â | Â | Â | Â | Â | Â |
   10 – 19 | 1396 | 92.9 | 1803 | 95.5 | 9.4 |  | .01 |  | .06 |
   20 – 29 | 4770 | 78.2 | 5784 | 85.6 | 99.2 |  | .001 |  | .10 |
   30 – 39 | 8084 | 69.3 | 9760 | 74.2 | 51.4 |  | .001 |  | .05 |
   40 – 49 | 6988 | 64.8 | 9463 | 64.1 | 0.8 |  | ns |  |  |
   50 – 59 | 4567 | 56.6 | 8149 | 50.7 | 40.9 |  | .001 |  | .06 |
   60 – 69 | 2866 | 48.7 | 7334 | 37.2 | 112.2 |  | .001 |  | .10 |
   70 – 79 | 2049 | 34.4 | 4340 | 22.3 | 103.0 |  | .001 |  | .13 |
   80 – 89 | 468 | 29.7 | 1004 | 19.5 | 18.2 |  | .001 |  | .11 |
   90 or older | 40 | 30.0 | 94 | 20.2 | 1.5 |  | ns |  |  |
Age of onset of smoking | Â | Â | Â | Â | Â | Â | Â | Â | Â |
   10 – 15 | 5543 | 72.2 | 9793 | 64.8 | 90.5 |  | .001 |  | .08 |
   16 | 5219 | 66.0 | 9258 | 62.2 | 20.8 |  | .001 |  | .04 |
   17 – 18 | 7621 | 62.4 | 12796 | 55.6 | 90.5 |  | .001 |  | .07 |
   19 – 20 | 4618 | 60.6 | 6506 | 52.8 | 67.6 |  | .001 |  | .08 |
   21 – 25 | 3023 | 57.0 | 3806 | 54.7 | 3.6 |  | ns |  |  |
   26 – 70 | 2717 | 59.2 | 1911 | 54.3 | 11.2 |  | .001 |  | .05 |
Cigarettes per day | Â | Â | Â | Â | Â | Â | Â | Â | Â |
   less than 5 | 6894 | 52.0 | 5431 | 52.6 | 0.4 |  | ns |  |  |
   5 – 20 | 20083 | 68.4 | 29398 | 61.4 | 256.0 |  | .001 |  | .07 |
   21 – 40 | 2625 | 72.7 | 7567 | 62.6 | 89.0 |  | .001 |  | .09 |
   41 or more | 272 | 50.0 | 1200 | 34.8 | 21.2 |  | .001 |  | .12 |
Disease (last 4 weeks) | Â | Â | Â | Â | Â | Â | Â | Â | Â |
   not diseased | 27042 | 65.4 | 40755 | 60.5 | 163.4 |  | .001 |  | .05 |
diseased for 1 year or less | 2074 | 58.9 | 3163 | 55.6 | 5.7 | Â | .05 | Â | .03 |
diseased for more than 1 year | 1465 | 47.4 | 2748 | 37.6 | 37.3 | Â | .001 | Â | .09 |