5 Prevalence ZEINAB This module presents statistics from Chapter 5: Prevalence Ontario Cancer Statistics 2016 Chapter 5: Prevalence

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 ZEINAB 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 2016 Prevalence

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 ZEINAB 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 2016 Prevalence

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 ZEINAB 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 2016 Prevalence