MHLU - Health Status Resource

All Causes of Hospitalization

All Causes of Hospitalization

Key Findings: 
  • Age-standardized hospitalization rates were lower in Middlesex-London compared to Ontario and the Peer Group over the whole time period between 2004 and 2009 (Fig. 4.1 and Fig. 4.2).
  • Age-standardized hospitalization rates in Middlesex-London, Ontario and for the Peer Group have decreased over time (Fig. 4.1 and Fig. 4.2).
  • Age-specific hospitalization rates were similar for both males and females under the age of 19. After age 20, hospitalization rates were higher for females between the ages of 20 and 44 due to pregnancy and childbearing. In those 45 years of age and older, rates were highest among males (Fig. 4.3).
  • In 2009, there were 28,910 hospitalizations or 6,685.5 hospitalizations per 100,000 people in 2009 in all residents of Middlesex-London. The number of hospitalizations was relatively consistent between 2003 and 2009 (Fig. 4.4). 
  • There were 11,656 hospitalizations in males and 17,254 hospitalizations in females in 2009 (Fig. 4.4).
  • Hospitalization rates for all causes in Middlesex County were higher than those in the City of London between 2003 and 2009 (Fig 4.5).  
  • Rates in both declined over time, though more dramatically in the County over the time period (Fig 4.5).
Interpretive Notes

Morbidity rate is the term used to describe the prevalence of illness or disease in a population. Morbidity, however, can be challenging to measure directly, so hospitalizations are often used as a proxy measure. Hospitalizations capture many different types of illness, disease and injuries that are occurring in the community but are not a perfect measure of morbidity because they only represent illness that is severe enough to require a hospital admission. This means that illnesses or injuries in the population cannot be accounted for if the person who is ill only goes to a family doctor or does not seek medical attention.

This chapter includes admissions to all acute care hospitals not visits to urgent care, emergency departments or long term care homes.  They include admissions for all individuals who live in the Middlesex-London, regardless of whether they were admitted to a hospital within Middlesex-London. Note that people who live in an area outside of Middlesex-London who are admitted to one of the Middlesex-London hospitals are not counted in this data.  The cause of hospitalizations are based on the most responsible diagnosis, which is the diagnosis associated with the longest duration of treatment during a given hospital stay.  These hospitalizations do not include mental health-related admissions due to limitations in the data source.

Diagnoses are classified using the Canadian modification of the International Statistical Classification of Diseases and Related Health Problems, Tenth Revision (ICD-10-CA).  They are grouped at the ‘chapter’ level in this report.  For more information about what diagnoses are included in each ICD-10 chapter please consult

How this Indicator was Calculated: 
Ontario Public Health Standard: 

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

Chronic Disease Prevention Standard - Requirement #1

Prevention of Injury and Substance Misuse Standard - Requirement #1

Jargon Explained

Peer Group 

Statistics Canada used socio-demographic data from the 2006 Census to create "peer groups" of health regions that have similar characteristics. 

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Age-standardized rate 

Age-standardized rates may be used to compare different geographic areas or time frames to adjust for any differences in the age structure of the populations that could cause a difference in rates. 

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Total number of events (e.g., deaths, births, hospitalizations) divided by the total population for a given time period and geography.

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