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Table 1 Summary of weighted descriptive statistics of analysis variables by sex, NHANES 1999-2012

From: The association of smoking and demographic characteristics on body mass index and obesity among adults in the U.S., 1999–2012

  Men Women
Mean 95% CI Mean 95% CI
Weight in lbs 196.48 [195.19, 197.78] 168.06 [166.76, 169.37]
Height in cm 176.54 [176.32, 176.76] 162.82 [162.62, 163.01]
Body Mass Index (BMI) 28.59 [28.42, 28.77] 28.80 [28.59, 29.02]
Weight categories (%)     
  Underweight 1% [1,1] 2% [2, 2]
  Normal weight 26 [25, 27] 34 [32, 35]
  Overweight 40 [39, 42] 28 [27, 29]
  Obese 33 [32, 34] 36 [35, 38]
Smoking status (%)     
  Never smokers 47% [45, 48] 57% [56, 59]
  Current smokers 28 [27, 30] 23 [22, 24]
Number of cigarettes/day (%)1     
   1-14 cigarettes 46% [44, 49] 52% [49, 55]
   15-24 cigarettes 34 [32, 36] 35 [33, 37]
   25 + cigarettes 19 [17, 22] 13 [11, 15]
  Former smokers 25 [24, 27] 20 [19, 21]
Years since quit smoking (%)2     
   Less than 1 year 9% [8, 10] 9% [7, 11]
   1-4 years 16 [16, 18] 17 [15, 19]
   5-9 years 16 [14, 18] 15 [14, 17]
   10 + years 59 [56, 61] 58 [55, 62]
Age 43.35 [43.02, 43.67] 44.12 [43.82, 44.42]
Race/Ethnicity (%)     
  White 69% [67, 72] 69% [65, 71]
  Black 11 [9, 12] 12 [11, 14]
  Hispanic 14 [12, 16] 13 [11, 15]
  Other 6 [5, 7] 6 [5, 7]
Foreign born (%) 19% [17, 21] 17% [15, 18]
Education (%)     
  < High school 18% [17, 19] 17% [16, 18]
  High school 25 [23, 26] 23 [22, 24]
  > High school 57 [55, 59] 60 [59, 62]
Married (%) 70% [69, 72] 66 [65, 68]
  Missing marital status 2 [1, 3] 1 [1, 2]
Number of kids (%)     
  No children n/a n/a 16% [15, 18]
  1-2 children n/a n/a 46 [44, 46]
  3-4 children n/a n/a 24 [23, 25]
  5 or more children n/a n/a 4 [4, 5]
  Missing n/a n/a 10 [9, 11]
  Observations 11123   10949  
  1. 1the proportions for number of cigarettes per day were derived from current smokers (3,359 men and 2,392 women).
  2. 2 the proportions for years since quit smoking were derived from former smokers (2,791 men and 1,901 women).
  3. n/a – not applicable.