MHLU - Health Status Resource

Primary tabs

Glossary: I

A (6) | B (2) | C (6) | D (2) | E (2) | F (2) | G (1) | H (5) | I (10) | K (1) | L (7) | M (3) | N (3) | O (3) | P (10) | R (2) | S (13) | T (4) | U (1) | V (1) | W (3) | Y (1)


A landed immigrant is defined as a person who is not a Canadian citizen by birth, but has been granted the right to live in Canada permanently. Landed immigrants must reside in Canada for a minimum of three years before they can apply for Canadian citizenship. Refugees, students, and those with work permits or Minister’s permits are not landed immigrants.

Immunization of School Pupils Act (ISPA)

Under the Immunization of School Pupils Act (ISPA), Ontario health units are required to collect immunization information on all students attending school within the health unit jurisdiction.  If a student’s immunizations are not up to date against diphtheria, measles, mumps, polio, rubella, or tetanus, the ISPA allows for the student to be suspended from school.  Those who have philosophical or medical reasons to be unimmunized can sign an exemption form.

Immunization Records Information System (IRIS)

IRIS is the information system used by all Ontario health units in Ontario to record immunizations and exemptions for all students attending school within the health unit jurisdiction, as well as children attending licensed day cares.  The database is maintained by the Ministry of Health and Long-Term Care and individual health units.

Impact of Health Problems

This is a crude measure of the impact of long-term physical conditions, mental conditions and health problems on the principal domains of life: home, work, school, and other activities.

Incidence Rate

The rate at which new events occur in the population in the given time period

Income Quintile

When the population is divided into five groups by level of household income these groups are called ‘income quintiles’. The proportion of the population in each quintile is equal. 

Index of Socioeconomic Distress in Maps

The socioeconomic distress index, developed at Human Environments Analysis Laboratory at Western University, takes into account four factors: highest level of completed education, unemployment rate, lone parenthood rate, and low income rate. Greater composite scores correspond to higher levels of socioeconomic distress.

Integrated Public Health Information System (iPHIS)

iPHIS is the information system used for reporting case information for all provincially and nationally reportable communicable diseases. This database is managed by the Ministry of Health and Long-term Care and used in Ontario public health units for communicable disease case and contact follow-up as well as outbreak management. 


IntelliHEALTH is managed by the Ontario Ministry of Health and Long-Term Care and contains health information from numerous data sources. The following data sources were used in this resource:

  • Vital Statistics (deaths) from the Office of the Ontario Registrar General;
  • Inpatient Discharges (hospitalizations, live births, stillbirths) from Canadian Institute for Health Information’s (CIHI) Discharge Abstract Database (DAD)
  • Population Estimates from Statistics Canada, approved by the Ontario Ministry of Finance.


Invasive Infections

An infection is considered invasive when it is found in a normally sterile part of the body, such as blood or cerebrospinal fluid.