1. 5
Prevalence
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This module presents statistics from Chapter 5: Prevalence
Ontario Cancer Statistics Chapter 5: Prevalence

2. Prevalence Overview
As of January 1, 2013, an estimated 362,557 people in Ontario (about 2.7% of the population) are living with a cancer diagnosed within the previous 10 years
Prevalent cases fairly evenly split between the sexes
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In this report, we focused on 10-year prevalence, which is defined as people who are still alive who had a diagnosis of cancer in the previous 10 years
As of the start of 2013, over 360,000 people in Ontario were living with a cancer diagnosed within the previous 10 years. This represents almost 3 percent of the province’s population
Unlike cancer incidence, mortality and survival, prevalent cases were fairly evenly split between males and females
Ontario Cancer Statistics Prevalence

3. Prevalence by Cancer Type
The most prevalent cancers in 2012 were prostate, female breast, colorectal, thyroid, melanoma and lung
Less common cancers are more prevalent in the population than more commonly diagnosed cancers
High incidence + high survival = high prevalence
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The most prevalent cancers among males were prostate and colorectal cancer, while among females it was breast and colorectal cancer
Less commonly diagnosed cancers such as thyroid and liver, are more prevalent in the population than more commonly diagnosed cancers like lung
The high prevalence of cancers such as thyroid and liver are a result of increasing incidence and high survival.
Ontario Cancer Statistics Prevalence

4. Prevalence Over Time
There are currently approx. 100,000 more people in Ontario living with a diagnosis of cancer than there were 20 years ago
Greatest increases: thyroid and liver cancers
Decreases: laryngeal, bladder, oral cavity and pharynx cancers and Hodgkin lymphoma
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Looking at changes in prevalence over time, we can see that the prevalence of cancer in the Ontario population is increasing over time
Between 1993 and 2003 there was an increase of approximately 100,000 people living with a cancer diagnosis
The greatest increases in prevalence have been in thyroid and liver cancers
Decreases in prevalence over time were found for cancers of the larynx, bladder, oral cavity and pharynx as well as Hodgkin lymphoma
Ontario Cancer Statistics Prevalence