Body Mass Index1 by sex, population aged 18 years and over, Laurentides2 and all of Québec, 1987, 1992-1993, 1998, 2000-2001, 2003 and 2005

1987 1992-1993 1998 2000-20013 20033 20053


% %

Laurentides
Males
Normal weight 51.3 41.6 39.2 41.9 41.0 45.8
   95% C.I.4 44.3 - 58.3 37.0 - 46.2 34.3 - 44.2 37.3 - 46.6 37.3 - 44.7 40.4 - 51.1
Overweight 38.3 48.6 45.3 45.0 43.3 37.6
   95% C.I.4 31.5 - 45.1 44.0 - 53.3 40.3 - 50.4 40.3 - 49.7 39.6 - 47.0 32.4 - 42.9
Obese 9.9 * 8.8 * 14.1 12.0 14.5 15.7
   95% C.I.4 6.1 - 14.9 6.4 - 11.9 10.8 - 18.1 9.1 - 15.4 11.9 - 17.2 12.3 - 19.7
  
Females
Normal weight 62.8 63.0 58.7 59.6 55.6 56.6
   95% C.I. 55.8 - 69.9 58.3 - 67.7 53.6 - 63.9 54.9 - 64.2 51.8 - 59.4 51.7 - 61.6
Overweight 17.7 * 24.7 24.3 25.0 27.3 27.0
   95% C.I. 12.4 - 24.1 20.5 - 28.9 19.8 - 28.8 20.9 - 29.2 23.9 - 30.7 22.6 - 31.4
Obese 10.8 * 7.8 * 12.7 10.9 12.6 12.5
   95% C.I. 6.7 - 16.3 5.4 - 10.9 9.4 - 16.6 8.1 - 14.2 10.1 - 15.1 9.3 - 16.2
  
Total
Normal weight 56.8 51.9 48.7 50.7 48.2 51.1
   95% C.I. 51.8 - 61.8 48.5 - 55.3 45.1 - 52.4 47.4 - 54.1 45.6 - 50.9 47.5 - 54.7
Overweight 28.5 37.1 35.1 35.0 35.4 32.4
   95% C.I. 23.9 - 33.0 33.8 - 40.3 31.6 - 38.5 31.9 - 38.2 32.8 - 38.0 29.1 - 35.7
Obese 10.3 * 8.4 13.4 11.4 13.6 14.1
   95% C.I. 7.5 - 13.9 6.6 - 10.4 10.9 - 15.9 9.3 - 13.6 11.8 - 15.4 11.6 - 16.6
  
Estimated population (k) 224.1 284.4 313.5 350.8 362.0 378.4
  
All of Québec
Males
Normal weight 55.5 46.1 43.5 47.9 43.5 43.0
   95% C.I. 53.8 - 57.1 44.7 - 47.5 42.1 - 44.9 46.4 - 49.3 42.0 - 45.0 41.7 - 44.4
Overweight 35.1 42.5 42.6 37.9 41.1 39.6
   95% C.I. 33.5 - 36.7 41.1 - 43.9 41.1 - 44.0 36.5 - 39.3 39.6 - 42.6 38.3 - 40.8
Obese 7.5 10.0 12.8 13.0 14.3 15.8
   95% C.I. 6.7 - 8.4 9.2 - 10.8 11.8 - 13.7 12.1 - 14.0 13.3 - 15.4 14.7 - 16.9
  
Females
Normal weight 64.6 60.7 57.8 56.9 56.2 55.9
   95% C.I. 62.9 - 66.2 59.3 - 62.1 56.4 - 59.2 55.5 - 58.3 54.7 - 57.7 54.7 - 57.2
Overweight 19.9 23.6 25.6 25.5 25.3 26.3
   95% C.I. 18.6 - 21.2 22.4 - 24.8 24.4 - 26.9 24.2 - 26.7 24.0 - 26.6 25.2 - 27.4
Obese 8.3 10.1 12.0 12.2 13.9 13.1
   95% C.I. 7.4 - 9.2 9.3 - 11.0 11.1 - 13.0 11.3 - 13.1 12.9 - 15.0 12.2 - 14.0
  
Total
Normal weight 60.0 53.4 50.5 52.4 49.8 49.5
   95% C.I. 58.8 - 61.1 52.4 - 54.4 49.5 - 51.6 51.4 - 53.4 48.8 - 50.9 48.6 - 50.4
Overweight 27.6 33.1 34.2 31.6 33.2 32.9
   95% C.I. 26.5 - 28.6 32.1 - 34.0 33.3 - 35.2 30.7 - 32.6 32.2 - 34.2 32.1 - 33.8
Obese 7.9 10.1 12.4 12.6 14.1 14.5
   95% C.I. 7.3 - 8.6 9.5 - 10.7 11.7 - 13.1 11.9 - 13.3 13.4 - 14.9 13.7 - 15.2
  
Estimated population (k) 4,588.6 5,122.5 5,217.6 5,592.8 5,669.9 5,772.3
  

1. The Body Mass Index (BMI) is the ratio of weight (in kilograms) to the square of height (in meters). In this table, a BMI from 18.5 to less than 25.0 is "normal weight," a BMI from 25.0 to less than 30.0 is "overweight" and a BMI greater or equal to 30.0 is "obese." The category of "underweight" (defined as a BMI of less than 18.5) is not presented because of the large number of imprecise estimates at the regional level (coefficients of variation of 15% or more). The estimated populations, however, were calculated for the four BMI categories.
2. Health region.
3. The evolution of data over time should be interpreted with caution: in 2000-2001, 2003 and 2005, information on height and weight was obtained via a questionnaire administered by an interviewer, whereas in the three previous surveys, it was obtained from a self-administered questionnaire. These different modes of collect may have affected data comparability.
4. Given that the data are from surveys, the 95% confidence interval (C.I.) indicates the limits around a sample estimate in which the true population value is expected to fail, 19 out of 20 times. When confidence intervals overlap, the difference is not considered statistically significant.
* Coefficient of variation between 15% and 25%; the estimate should be interpreted with caution.
  
Sources: Santé Québec, 1987 Santé Québec survey, 1992-1993 and 1998 Québec Health and Social Survey,
    Statistics Canada, Canadian Community Health Survey, cycle 1.1 (2000-2001), cycle 2.1 (2003) and cycle 3.1 (2005), Québec data share file.
Compilation: Institut de la statistique du Québec, Direction des statistiques sociales, démographiques et de santé.
 
7 mai 2009
       
Signes conventionnels utilisés dans les tableaux