MHLU - Health Status Resource

Age and Sex Distribution

Age and Sex Distribution

Key Findings: 
  • Compared to the population of Ontario, Middlesex-London had a greater proportion of young adults between the ages of 15 and 29 years (Fig. 1.6).
  • Middlesex-London also has a slightly lower proportion of children under aged 5  to 14 and people between the ages of 35 and 54 compared to Ontario (Fig. 1.6).
  • Maps (Fig. 1.7 to Fig. 1.12) show how the density of people in certain age groups (zero to four, zero to 19, 65 and older) varies in the City of London and the County of Middlesex, according to 2006 Census data.
  • The Total Dependency Ratio was 0.6 indicating there was 0.6 of a youth or senior for every adult 20 to 64 years of age, or three youth or seniors for every five adults between the ages of 20 and 64 (Fig. 1.13).
  • The Youth Dependency Ratio was double the Elderly Dependency Ratio (Fig. 1.13).
  • All Dependency Ratios for Middlesex-London were the same as those for Ontario (Fig. 1.13).
Interpretive Notes

Dependency ratios measure the relative proportion of people who are considered dependent in a population, those who are under age 20 or over age 65, relative to those aged 20 to 64. The higher the dependency ratio, the greater the number of people who may be dependent on others such as family, caregivers or government support. A dependency ratio of 0.5 means that there is one child or senior for every two people between the ages of 20 and 64 years. The dependency ratio assumes that all people 20 to 64 years of age are not dependant and that all people over the age of 65 are dependent, an assumption that does not hold true for all.

How this Indicator was Calculated: 
Ontario Public Health Standard: 

Population Health Assessment and Surveillance Protocol- Section 1, Subsections b-i

Jargon Explained

Youth Dependency Ratio 

Number of children under the age of 20 divided by the number of people aged 20 to 64. 

Elderly Dependency Ratio 

Number of people aged 65 years and older divided by the number of people aged 20 to 64.